Difference between revisions of "Product Explanation: Gate 4"

From GICL Wiki
Jump to: navigation, search
(Cause for Corrective Action)
(Design Revisions)
 
(11 intermediate revisions by one user not shown)
Line 42: Line 42:
  
 
{| border="3"  
 
{| border="3"  
|+ '''Table 2: Reassembly Process'''  
+
|+ '''Table 2: Scan Reassembly Process'''  
 
! width="50"|Step # !! width="150"|Parts !! width="450"| Procedure !! width="65"|Difficulty !! width="300"|Images
 
! width="50"|Step # !! width="150"|Parts !! width="450"| Procedure !! width="65"|Difficulty !! width="300"|Images
 
|-
 
|-
Line 145: Line 145:
 
| align="center"|1
 
| align="center"|1
 
| [[File:IR19.JPG|150px]][[File:IR20.JPG|150px]]
 
| [[File:IR19.JPG|150px]][[File:IR20.JPG|150px]]
 +
|}
  
 +
 +
 +
{| border="3"
 +
|+ '''Table 3: Fax Reassembly Process'''
 +
! width="50"|Step # !! width="150"|Parts !! width="450"| Procedure !! width="65"|Difficulty !! width="300"|Images
 
|-
 
|-
 
| align="center"|12
 
| align="center"|12
Line 324: Line 330:
 
| align="center"|2
 
| align="center"|2
 
| [[File:IR56.JPG|150px]][[File:IR57.JPG|150px]]
 
| [[File:IR56.JPG|150px]][[File:IR57.JPG|150px]]
 +
|}
  
 +
 +
 +
{| border="3"
 +
|+ '''Table 4: Printer Reassembly Process'''
 +
! width="50"|Step # !! width="150"|Parts !! width="450"| Procedure !! width="65"|Difficulty !! width="300"|Images
 
|-
 
|-
 
| align="center"|31
 
| align="center"|31
Line 730: Line 742:
  
 
==Design Revisions==
 
==Design Revisions==
<gallery widths=200px heights=150px perrow=3 caption="Figure 2 - Design Revisions">
+
[[File:Inkypaint.jpg|thumb|200px|Figure 2: Print Preview]]
File:Inkypaint.jpg|HP officejet with enhanced display
+
File:Inkyproc29.jpg|Replace doors on the carriage
+
File:Inkytray.gif|Double input trays
+
</gallery>
+
 
===Print Preview===
 
===Print Preview===
It is commonly known that when one decides to print something, it does not always go as expected. For some cases, this can be avoided by the “print preview” command on the computer program. However, other unanticipated prints occur from a misinterpretation of the transfer of information from the computer to the printer. In this situation, the preview on the computer displays a different image than what will eventually be printed. A solution of this problem can come from altering our control panel to display the actual image that the printer is about to export. For the HP Officejet 7310, the display screen will require an increase in resolution and image quality to maintain its adequate aesthetics. This revision will enhance the societal aspects of the product by creating an easier to use, visually appealing system. A case can also be made for environmental and economic factors, as a decrease in mistakes directly corresponds to a decrease in paper waste. This design revision allows for a more modern-looking, environmentally-friendly, and cost-efficient product that has the potential to both improve sales and benefit the consumer.
+
It is commonly known that when one decides to print something, it does not always go as expected. For some cases, this can be avoided by the “print preview” command on the computer program. However, other unanticipated prints occur from a misinterpretation of the transfer of information from the computer to the printer. In this situation, the preview on the computer displays a different image than what will eventually be printed. A solution of this problem can come from altering our control panel to display the actual image that the printer is about to export.
  
===Carriage Doors===
+
For the HP Officejet 7310, the display screen will require an increase in resolution and image quality to give the user a clear and true depiction of the page about to be printed. For this reason a new screen will be required which will cost more than the current configuration. As this printer is made and designed for small businesses however, the comparatively low increase in cost to the overall price of the printer won’t be a huge consideration.  
Printer ink has never been cheap, and for a print heavy household cartridges seem to deplete with alarming frequency. Companies, including HP, have developed extra large cartridges to accommodate those who use a lot of ink. These special cartridges usually have a longer nose, extending past the carriage and into the printer cavity. In the case of the HP Officejet 7310 however, the two doors that enclose standard ink cartridges won’t allow for a larger cartridge to be placed. A revision we would make would be to eliminate the door system and install a more snap based system as seen with other printers. This will allow the extra large cartridges to be installed. This revision is societal in that the ink cartridges will need to be changed less often, as well as making the carriage more compatible for other cartridges. There is also an economic side. For the company building the printer, a snap method will eliminate the door parts, lowering manufacturing cost. For the consumer, the unit price of the larger ink cartridges is less than the standard cartridges, reducing expenses. Environmentally, using the larger cartridges decreases the amount of waste produced when the ink runs out.
+
  
 +
This revision will enhance certain societal aspects of the product. The screen will make the printer easier to use by making instructions and images easier to see, and will also make the product a more visually appealing system. A case can also be made for environmental and economic factors. By having a more accurate, accessible, and reliable print preview, people will be able to cancel incorrect print jobs. This decrease in mistakes directly corresponds to a decrease in paper waste. Economically, adding these features makes for a more modern-looking, environmentally-friendly, and cost-efficient product.  These factors benefit the consumer, and as a result have the potential to improve sales.
 +
 +
[[File:inkysnap.jpg|left|thumb|200px|Figure 3: An XL cartridge being snapped into place]]
 +
===Ink Securing System===
 +
Printer ink has never been cheap, and for a print heavy household cartridges seem to deplete with alarming frequency. Companies, including HP, have developed extra large cartridges to accommodate those who use a lot of ink. These special cartridges usually have a longer nose, extending past the carriage and into the printer cavity. In the case of the HP Officejet 7310 however, the current system of securing the standard ink cartridges has two doors that won’t allow for a larger cartridge to be placed.
 +
 +
A revision we would make would be to eliminate the door system and install a more snap based system as seen with other, even HP, printers. For this snap system all the user would have to do is slide the cartridge into place and push up. To take the cartridge out, simply push down and slide out. This will allow the extra large cartridges to be installed. Seeing as HP already has this system in place on some of its other printers, it wouldn’t take too much effort to simply transfer the design to the 7310. The carriage is largely independent of other parts, only coming in contact with the shaft it rides on, and changing it wouldn’t affect any other systems. 
 +
 +
This revision is societal in that the ink cartridges will need to be changed less often, as well as making the carriage more compatible for other cartridges. There is also an economic side. For the company building the printer, a snap method will eliminate the door parts, lowering manufacturing cost. For the consumer, the unit price of the larger ink cartridges is less than the standard cartridges, reducing expenses. Environmentally, using the larger cartridges decreases the amount of waste produced when the ink runs out.
 +
 +
[[File:Inkytray.gif|thumb|200px|Figure 4: Double input trays]]
 
===Additional Input Tray===
 
===Additional Input Tray===
Most consumers utilize their printers for multiple functions. Some examples include printing photos, different sizes, colors, and various materials of paper. For a person using the HP Officejet 7310, in order to use different papers they must first switch the paper within the single tray. To make life easier for the consumer, a revision would be to add a second input tray. This will allow two different types of paper to be stored at the printer at the same time. The user would only have to select the paper from the computer instead of having to manually switch it. This would be very beneficial for businesses who frequently switch from blank paper to letterheads. This option would make the printer slightly less economic, as adding a second tray increases material cost. Considering that this printer is intended for corporations, the slight increases in price is worth the societal benefits of higher performance and efficiency.
+
Most consumers utilize their printers for multiple functions. Some examples include printing photos, different sizes, colors, and various materials of paper. For a person using the HP Officejet 7310, in order to use different papers they must first switch the paper within the single tray.  
 +
 
 +
To make life easier for the consumer, a revision would be to add a second input tray. This will allow two different types of paper to be stored at the printer at the same time. The user would only have to select the paper from the computer instead of having to manually switch it. This would be very beneficial for businesses who frequently switch from blank paper to letterheads. Unfortunately the current model would not support a second tray. Some structural supports would have to be redesigned, as well as the outer casing. An additional roller shaft would also be needed to get the paper started, as well as another motor to power this shaft independently from the others.
 +
 
 +
This option would make the printer less economic. Adding a second tray increases material cost, as well as the new rollers and motor. Also the manufacturing cost will increase seeing as HP would have to change molds and processes in order to accommodate for the new design changes. Considering however that this printer is intended for corporations, the increases in price would be worth the societal benefits of higher performance and greater efficiency.
  
 
=Main Page=
 
=Main Page=
 
*[http://gicl.cs.drexel.edu/wiki/Group_28_-_HP_Officejet_7310_All-in-One_printer Group 28 - HP Officejet 7310 All-in-One printer]
 
*[http://gicl.cs.drexel.edu/wiki/Group_28_-_HP_Officejet_7310_All-in-One_printer Group 28 - HP Officejet 7310 All-in-One printer]

Latest revision as of 11:53, 18 December 2011

Figure 1: "Inky," our HP Officejet 7310, back together in one piece.

Contents

Project Management: Critical Project Review

Cause for Corrective Action

With our project nearing its completion, our group can safely say we have no unresolved challenges remaining. A large part of this success is due to how well our group works together and its strong leadership. By having good clarity and drive, we don’t get caught up on the little things and always have the end goal in sight. This allows for challenges to be handled much more efficiently, and to keep our work from going off on tangents.

One of our most recent challenges however was deciding how to document gate four. We were faced with the option to take general pictures and film most of our steps, or to take more specific “before and after” pictures. Our group decided on the later. We felt that the reward that came with filming every step was not worth the effort it would take. Vigilantly filming and editing would have been far more troublesome than taking simple pictures. Besides that, with pictures we can always get the angle we want, where as with film it may be more difficult to see what is happening.

Another challenge we overcame was the poor quality of report on the last two gates. Mostly all of the points lost came from a lack of following direction. Since receiving our grades however, any confusion concerning the direction has been cleared up, and we were able to go back and work more in depth on parts we may have missed the first time around. For the initial submission of this report, we were sure to read and follow the direction as close to the letter as we could. Before on the previous gates we were wary of over documentation, but since then we have learned the more information the better. This over documentation ties back in with our picture taking. Compared to previous gates, this gate has nearly double the amount of pictures.

Product Archaeology

Ease of Reassembly

In order to assign a level of difficulty to each step of our reassembly, we created this scale.

Table 1: Difficulty Scale
Difficulty # Description
1
  • These simple tasks require very little force. It is easy to see what to do for these kinds of steps and usually only two parts are involved in the process.
2
  • For these kinds of steps it may be necessary to screw components into place, requiring the use of a screwdriver. These steps may also require some tricky adjustments of the parts to get them into the proper location.
3
  • More than two parts are usually involved in these steps. Often there are intermediate stages where parts must be held until another part is placed over top. Once both parts are placed they can then be screwed down at the same time. A step requiring a greater deal of force is also considered a 3.
4
  • These complex tasks don’t usually require a great deal of force, but take place in a tight environment. There are often many parts involved, and it isn’t all that easy to see what each part does and where it goes. For these tasks the use of multiple people may be necessary.
5
  • These steps not only take place in a small environment, but require a great deal of force as well. Multiple people are necessary for these tasks, as there will be a number of stages that must be completed simultaneously. Visibility will be low, making it very difficult to see what is being done.

Product Reassembly

To complete this reassembly we did everything by hand, along with the use of a screwdriver. Originally however, this product was assembled through a much more automated process. The use of machines and robots not only cuts down on the time it takes to assemble, but also eliminates human error. Despite the differences between human and automated assembly, the order in which the components are put together stays mostly the same. Many of the parts cannot be added until one part is laid down, and many others cannot be added if another part is laid down before it. The sequence in which the parts are assembled is crucial.

During our disassembly we started at the top and worked our way down. For the reassembly we are doing exactly the opposite, starting at the bottom and building up. This much said the assembly and disassembly are very similar. However, where the assembly and disassembly differ the most is in the thinking required. For disassembly we simply tore the product down. This made it difficult to recognize the function of many parts as by the time we reached a crucial piece, the components it affected were already removed. During reassembly however, we need to think about what part goes where; it’s not as simple as tearing them off. In doing so we better realize the functions of various components we may have overlooked.

Table 2: Scan Reassembly Process
Step # Parts Procedure Difficulty Images
1
  • Scan cavity
  • Scan shaft with motor
To begin the reassembly, we will first reconstruct the scanner. Find the colored wires in the scan cavity. Locate the motor attached the scan shaft. On the motor is a small circuit board, connect the wire with the circuit board by gently pushing it into place. 1 IR1.JPGIR2.JPG
2
  • Scan cavity
  • Scan shaft
Now that the wire is connected to the motor, rest the shaft within the scan cavity along the slot. To fix the shaft in place, push down until you hear and feel it snap into position. 2 IR3.JPGIR4.JPG
3
  • Scan cavity
  • Scan head
There are three information ribbons on the scan cavity. Two of them are leading outside. Locate the third ribbon, the one still inside the cavity. Take this ribbon and curl it around the bracket on the scan head. This will keep the ribbon from interfering with the head’s motion, so make sure it is secure. Plug the ribbon into its slot on the scan head circuit board. 2 IR5.JPGIR6.JPG
4
  • Scan head
  • Scan shaft
With the ribbon securely attached to the scan head, we can now attach the scan head to the shaft. Line up the scan head with the motor and shaft. Push down until you feel and hear it snap into place. 2 IR7.JPG
5
  • Control panel holder
  • Scan cavity
  • Information ribbon
The interior of the scanner is now complete. To begin work on the exterior, take the control panel holder and locate the slot on its side. Take the two remaining ribbons from the scan cavity and run them through this slot. Now snap the control panel holder into its place on the scan cavity. 1 IR8.JPGIR9.JPG
6
  • Control panel
  • Control panel holder
  • Info ribbon
Next take the control panel and locate the smaller circuit board on its backside. Connect the two ribbons to their respective ports on this circuit board. 1 IR10.JPGIR11.JPG
7
  • Scan glass
  • Scan cavity
  • Black exterior screws (x8)
Place the scan glass on top of the scan cavity, making sure to line up the screw holes. Using a hex head screwdriver, attach the glass to the cavity using 8 black exterior screws. 2 IR12.JPGIR13.JPG
8
  • Control panel
  • Control panel holder
With the scan glass attached, the circuit board can now be attached to the control panel holder. Make sure the ribbons are inside the holder and not sticking out. Push the control panel into place on the holder until you hear and feel it snap into position. 1 IR14.JPGIR15.JPG
9
  • Scan relfector
  • Scan top (fax tray)
Next reattach the scan reflector to the fax tray using glue. Push the hinges on the fax tray into place on the scan cavity until you hear and feel a snap. 1 IR16.JPGIR17.JPG
10
  • Fax tray
  • Tray edge
With the scanner now finished, we will begin reassembly of the fax. Snap the tray edge into place on the fax tray. 1 IR18.JPG
11
  • Fax tray
  • Tray trim
Snap both sides of the tray trim into place on the fax tray. The HP logo should be on the same side as the control panel. 1 IR19.JPGIR20.JPG


Table 3: Fax Reassembly Process
Step # Parts Procedure Difficulty Images
12
  • Tooth strip (x2)
  • Paper guide (x2)
  • Fax in tray
Next we will reassemble the fax in tray. Taking the clear tray, turn it upside down. On the underside, take a grey paper guide and push its leads up through the tray. Then take the black tooth strip and attach this to the paper guide’s leads. Do this for both sides 3 IR21.JPGIR22.JPG
13
  • Fax in tray
  • Central gear
  • Screw (x1)
With the paper guides and tooth strips attached, now place the black central gear between the two tooth strips, making sure the teeth line up. Both tooth strips and their associated paper guides should now move dependently with the other side. Affix the gear to the fax in tray by screwing it into place using a hex head screwdriver. 2 IR23.JPGIR24.JPG
14
  • Fax rollers
  • Fax roller shaft
The fax rollers must now be placed within their housing on the fax roller shaft. The grey roller is away from the shaft while the tan roller fits inside. Push the rollers into the housing until they snap into place 2 IR26.JPGIR27.JPG
15
  • White shaft lock
  • Fax roller shaft
  • Fax mechanism
In order to attach the paper roller to the fax mechanism, first slide a white lock onto the shaft. Slide the lock all the way to the end and send the shaft through its hole in the fax. The gear end of the shaft should stay on the same side as the single white gear on the fax. Do not lock into place yet. 1 IR28.JPGIR29.JPG
16
  • Fax roller shaft
  • Rubber rollers (x2)
Next slide the two rubber rollers onto the shaft. Make sure that each roller is about a third of the shaft length away from the sides. 3 IR30.JPG
17
  • Fax roller shaft
  • White shaft lock
Once the rollers are on, slide the shaft through the opposite hole in the fax. Take a lock and put it on the shaft. Turn the lock to keep the shaft from sliding out. 1 IR31.JPGIR32.JPG
18
  • Fax mechanism
  • White top hat gear
  • White crescent gear
Now turn the fax mechanism on its side, looking at the side with the two white gears. Take one of the tall top hat gears and place it on the black peg in the lower left of the fax. Next take a crescent moon gear and place it on the same peg as the top hat gear. The moon gear should be gear side down, with the longer end pointing out and to the left. 1 IR33.JPGIR34.JPG
19
  • Fax mechanism
  • Fat white gear
Next take the fat white gear and place it on the other black peg so that it sits within the crescent of the moon gear. Be careful not to tip the fax mechanism as these gears will fall off. 1 IR35.JPGIR36.JPG
20
  • Fax mechanism
  • White top hat gear
  • Black double gear
Now a place another top hat gear in the upper right corner of the fax on a black peg. Place the black double gear upon this, with the gear face down. 1 IR37.JPGIR39.JPG
21
  • Grey gear plate
  • Black top hat gears (x3)
Setting aside the fax mechanism, take the grey gear plate and place a black top hat gear brim down on the middle peg. Take a second hat gear, and place it brim down on the left peg so that it meshes with the first gear. Take a third hat gear and place it on the remaining peg. 1 IR41.JPGIR42.JPG
22
  • Gear plate
  • White triple gear
Next take the white triple gear and place it on the middle peg, angled so that the hat gear which isn’t meshed sits within its crescent. 1 IR43.JPGIR44.JPG
23
  • Fax roller
  • Fax mechanism
Take the fax roller and place its shaft in the slots on the fax mechanism. Turn the stopper on the end of the shaft to lock it in place. The end without the stopper should be pointed toward the gear side of the fax mechanism. 2 IR45.JPG
24
  • Grey gear plate
  • Fax mechanism
Now take the grey gear plate and mesh it together with the gears on the side of the fax mechanism. The shaft of the fax roller should run through a hole on the gear plate. 2 IR46.JPGIR47.JPG
25
  • Fax motor
  • Silver screws (x5)
Next take the motor and line up the holes on its plate with the holes on the gear plate. Using 5 silver screws, attach the motor, gear plate, and fax mechanism to each other. 2 IR48.JPGIR49.JPG
26
  • Fax motor circuit board
  • Fax mechanism wire
Take the wire connected to the fax mechanism and gently push it into place on the motor circuit board. 1 IR52.JPGIR53.JPG
27
  • Fax mechanism
  • Spring
On the opposite side of the fax mechanism, the one without the gears, take the spring and attach it to the mechanism by each of its moorings near the bottom and top. 1 IR50.JPG
28
  • Fax mechanism
  • Fax in tray
With the scan mechanism and gears cleaned up and put together, we can now attach the tray we previously completed; simply slid the notches on the tray into the slots on the mechanism. 1 IR51.JPG
29
  • Fax door
  • Door latch
  • Bar hinge
It is now time to connect the fax mechanism to the top of the scanner and larger fax tray. First the fax door must be attached. Snap the black latch into place on the underside of the door. Then line up the fax door with its moorings on the scan top, and slide the metal bar through to secure it. 2 IR54.JPGIR55.JPG
30
  • Fax mechanism
  • Scan top
  • Fax door
  • Black exterior screw (x1)
Place the fax mechanism on the scan top. Line up the hole on the left edge with the hole in the fax door and scan top. Screw into place. Close door. The fax is now complete. 2 IR56.JPGIR57.JPG


Table 4: Printer Reassembly Process
Step # Parts Procedure Difficulty Images
31
  • Bottom paper guide
  • Peg spring
  • Pad
To begin the reassembly of the printer portion, first take the bottom paper guide and drop the peg spring in its hole on the right side. Then take the cream colored pad and click it into place over the spring. 1 IR58.JPGIR59.JPG
32
  • Bottom paper guide
  • Plastic rod
Next place the plastic rod underneath the paper guide with its flaps sliding into the grooves on the guide. 1 IR60.JPG
33
  • Bottom paper guide
  • Base
Take the crooked end of the plastic rod and send it through its hole on the left side of the base. Snap the bottom paper guide into place. 2 IR61.JPGIR62.JPG
34
  • Grey flap
  • Tray
Setting the base aside, take the tray and attach the large grey flap by snapping it into place. 2 IR63.JPGIR64.JPG
35
  • Base
  • Silver rectangle
Place the small metal rectangle into its grooves on the base. This piece will not snap in, it will just lay there for now. 1 IR65.JPG
36
  • Tray
  • Base
Now take the tray with the flap attached and slide it into position on the base. There are many grooves and snaps that need to line up in order to attach it. 2 IR66.JPGIR67.JPG
37
  • Felt carpets (x2)
  • Base
Next place the two felt carpets on the base on the left and right sides. 1 IR68.JPGIR76.JPG
38
  • Metal gear plate
  • Base
We will now begin to build up the left side. Slide the grey metal gear plate into its slots along the base. The gears and circuit board should be to the outside of the printer. 2 IR69.JPGIR70.JPG
39
  • Small roller
  • Metal gear plate
  • Base
With the side up, we can now place the small roller into its three grooves, and turn its stoppers so it stays in place. 2 IR71.JPG
40
  • Large roller
  • Compression spring
  • Base
The large roller can now be set in place as well. Make sure the small white gear box meshes with the larger gear. There is a spring attached to this gear box that must also attach to the base. First line up the spring on the base, and then slide the shaft into position. Finally turn the stoppers to lock it down. 4 IR77.JPGIR78.JPG
41
  • Metal gear plate
  • Plate cover
Place the black cover over top of the gears and film. It will snap into place. 1 IR73.JPG
42
  • Circuit board
  • Right side support
  • Screws (x3)
Turning to the right side of the printer, attach the major circuit board to the right side support with 3 silver screws. 2 IR74.JPGIR75.JPG
43
  • Right side support
  • Base
Now slide the right side support into the slots on the base. 1 IR79.JPG
44
  • Multicolored wires with circuit board
  • Screws (x2)
Reconnect the small circuit board to the printer with a single screw. By attaching this board we reconnect the large bundle of multicolored wire to the printer as well. Also attach the right side support to the printer base with another screw. 2 IR80.JPGIR81.JPG
45
  • Ink garage
  • Corner bracket
  • Screw (x1)
Next place the large plastic ink garage onto the base. This will just sit here for now. Also screw the small corner bracket to the base. Be sure the hook latched onto the right side support. 2 IR82.JPGIR83.JPG
46
  • Base
  • Right angle screw holes (x2)
In order to place the shaft on the printer, we must first attach the right angle screw holes. Place the screw holes into their slots at a 90 degree angle at first, and then rotate up to lock them into place. 1 IR87.JPGIR88.JPG
47
  • Shaft
  • Right angle screw holes (x2)
  • Ink garage
  • Long silver screws (x2)
  • Black screw (x1)
Take the shaft and lay it across the screw holes. There are 3 screws that will need to be used. Two long silver screws will be needed for each of the screw holes and one black screw attaches the shaft to the large black plastic ink garage. 2 IR89.JPGIR90.JPG
48
  • Small motor
  • Belt tension guide
  • Screws (x2)
  • Small belt
There are two motors, one big and one small. Place the small motor through its hole on the left side support. Screw the right side of the motor to the support. Don’t screw the left side. Next take the belt from the white gear, and slide it over the motors shaft. Now take the belt tension guide and place it over top of the motor, so that the belt is between the two rollers. The guide’s screw hole should line up with the motor’s left hole through the support. Screw them together. 3 IR93.JPGIR94.JPG
49
  • Spring
There is a bracket on the base on the left side. Attach the spring to it, and to the hook near the top of the printer. 1 IR95.JPG
50
  • Horizontal support
  • Info strip bracket
  • Large motor
  • Screws (x2)
Before we can place the horizontal support on the base, first we must attach the small information strip bracket and carriage motor. Take the bracket and slip it into the notch on the left side of the horizontal support. The screw holes should line up. Next take the larger motor and push it through from the back. Screw the motor and bracket to the support. The left screw should go through all three parts, and the right just through the support and motor. 3 IR85.JPGIR86.JPG
51
  • Horizontal support
  • Base
  • Screws (x3)
With all the small parts in place on the left side, we can now attach the horizontal support to the base. Place the horizontal support on the base. You may need to wiggle it around a little bit before it falls into its slots. Once it is in its slots, screw it to the base. 2 IR91.JPGIR92.JPG
52
  • Horizontal support
  • Belt
  • Info strip
Next take the belt and wrap it around the right side wheel of the horizontal support. Pull it across to the left and place it over the wheel there. There is a spring attached to the right wheel that will allow the belt to stretch that far. Now take the information strip. There are two ends, one with a vertical slit and the other with a slanted slit. The vertical slit end slips onto the bracket on the left side. The slanted goes on the right. If there isn’t enough tension, bend the left side bracket back before putting the strip on. 2 IR96.JPGIR97.JPG
53
  • Belt runner
  • Carriage
To place the carriage on the shaft and belt, first we must attach the belt runner. The belt runner normally would latch on to the belt so that it could push the carriage back and forward. In our case the runner is broken, so we simply snapped it into place on the shaft. Next take the carriage and snap it into place on the shaft. The belt runner should fit snuggly between the carriage’s two shaft snaps. 2 IR98.JPGIR99.JPG
54
  • Circuit board
  • Multicolored wires
  • Carriage ribbon
Now we will begin placement of the wires. First attach the multicolored wire box to the circuit board at the top. Next attach the carriage ribbon to the circuit board. Once the carriage ribbon is attached, weave it behind and through its slot on the horizontal support. 1 IR100.JPG
55
  • Multicolored wires
  • Small motor
  • Large motor
From the multicolored wires, plug the two ends into their respective ports on the large and small motors. 1 IR101.JPGIR102.JPG
56
  • Multicolored wires
  • Horizontal support
Also from the multicolored wires, plug the ends into the two ports on the horizontal support and the left front corner circuit board. 1 IR103.JPGIR104.JPG
57
  • Carriage ribbon
  • Carriage
  • Ribbon holder
  • Horizontal support
  • Screw (x1)
To attach the carriage ribbon to the carriage, first run the two ribbons through the slots on the carriage’s left side. Then plug them into the carriage. To keep the ribbon from getting in the way, run the ribbon across the horizontal support and secure it by screwing the ribbon holder to the support, and overtop of the ribbon. (See pictures for step 58) 3 IR106.JPG
58
  • Paper guide
  • Spike roller
  • Screws (x2)
Next take the black paper guide and slide it over the small rollers and underneath the large rollers. The front end should rest on the small roller shaft. The rest of the paper guide should snap into place. Next screw the spike roller into place on the base and overtop of the small roller. 3 IR105.JPGIR107.JPG
59
  • Wheel rollers
Turn the printer around so you are facing its back. Take the wheel roller shaft with the rollers still attached and slide it into the slots. Make sure the slots slip into the grooves on the shaft locks. Once in place turn the locks to keep the shaft from coming out. 2 IR108.JPGIR109.JPG
60
  • Rear plate
  • Screws (x2)
Next take the rear plate and lay it across the vertical sides of the base. The two screw holes that connect the plate to the base should line up. Screw into place. 2 IR110.JPGIR111.JPG
61
  • Black paper guides (x4)
With the rear plate attached we can insert the four black paper guides into place. From the front of the printer slide the guides underneath the shaft and horizontal support so that their peg comes up through the slots in the rear plate. Don’t worry if they aren’t straight yet. 4 IR112.JPGIR113.JPG
62
  • Springs (x4)
  • Black paper guides
  • Rear plate
Next take four springs, placing one end of each spring on the peg of the rear plate and the other end on the peg of the paper guide. The paper guides should now be straight and pressing against the large rollers. 2 IR114.JPGIR115.JPG
63
  • Rear shelf
  • Rear plate
  • Screws (x2)
Now take the rear shelf and insert it into the rear plate. Once it is in place, two screws secure it to the plate. 2 IR116.JPGIR117.JPG
64
  • Multicolored wires
  • Rear shelf
Run the multicolored wire across the rear shelf. This will keep them out of the way. 1 IR118.JPG
65
  • Left side casing
Now it is time to begin attaching the outer casing. Starting on the left side, first slide the plastic pegs on the casing into the notches on the base. This is the easiest way to make sure everything lines up. 2 IR119.JPGIR120.JPG
66
  • Right side casing
Do the same on the right side. There are two holes in the front of the printer that each side hooks around. Do not screw these in yet. 2 IR121.JPGIR122.JPG
67
  • Printer back
Next take the printer back and hook it into place. Make sure not to overlook the hooks that connect to the base. These should be hooked first before attaching the back to the sides. 2 IR123.JPGIR124.JPG
68
  • Print cover
Now it is time to attach the print cover. Before setting the cover down, take the colored wires from the cover and place them in the circuit board. Then set the cover down. Before screwing everything down, make sure all the sides are flush with each other and the cover. It is very easy for snaps to come undone until the cover is screwed down. 3 IR126.JPGIR125.JPG
69
  • Screws (x8)
  • Print cover
Screw the cover into place. Don’t overlook the holes in front and along the hinge. These holes are hard to see, but it is very important that their screws are tight and secure. 2 IR127.JPGIR128.JPG
70
  • Scan/fax
  • Circuit board
Now it is time to attach the scan/fax to the printer. Begin by holding the scan/fax over the printer, and attaching the information ribbons to the circuit board. The slots which these ribbons go to are located at the top of the board, and the sides do not interfere. 2 IR130.JPGIR129.JPG
71
  • Scan/fax
  • Springs (x2)
  • Sliders (x2)
  • Printer
To affix the scan/fax to the printer, first connect the hinges on each. There are two sliders, one on each side of the scan/fax. There are also two springs, one on each side of the printer. There are also two tracks in the printer that each slider must slide in. With the scan/fax still connected by the hinges to the printer, push the end of the spring into its slot on the slider. Do this on both sides. Then slowly lower the scan/fax. The springs will be providing a good deal of tension, and may slip off. Keep lowering the scan/fax until you hear and feel the sliders snap into place on their tracks. The door should now be able to open and close freely. 5 IR132.JPGIR131.JPG
72
  • Removable tray
Finally attach the removable tray by placing it into its spot above the in tray. 1 IR133.JPGIR134.JPG
  • HP Officejet 7310 All-in-One
The HP Officejet 7310 All-in-One is now successfully rebuilt. IR135.JPGIR136.JPG

Design Revisions

Figure 2: Print Preview

Print Preview

It is commonly known that when one decides to print something, it does not always go as expected. For some cases, this can be avoided by the “print preview” command on the computer program. However, other unanticipated prints occur from a misinterpretation of the transfer of information from the computer to the printer. In this situation, the preview on the computer displays a different image than what will eventually be printed. A solution of this problem can come from altering our control panel to display the actual image that the printer is about to export.

For the HP Officejet 7310, the display screen will require an increase in resolution and image quality to give the user a clear and true depiction of the page about to be printed. For this reason a new screen will be required which will cost more than the current configuration. As this printer is made and designed for small businesses however, the comparatively low increase in cost to the overall price of the printer won’t be a huge consideration.

This revision will enhance certain societal aspects of the product. The screen will make the printer easier to use by making instructions and images easier to see, and will also make the product a more visually appealing system. A case can also be made for environmental and economic factors. By having a more accurate, accessible, and reliable print preview, people will be able to cancel incorrect print jobs. This decrease in mistakes directly corresponds to a decrease in paper waste. Economically, adding these features makes for a more modern-looking, environmentally-friendly, and cost-efficient product. These factors benefit the consumer, and as a result have the potential to improve sales.

Figure 3: An XL cartridge being snapped into place

Ink Securing System

Printer ink has never been cheap, and for a print heavy household cartridges seem to deplete with alarming frequency. Companies, including HP, have developed extra large cartridges to accommodate those who use a lot of ink. These special cartridges usually have a longer nose, extending past the carriage and into the printer cavity. In the case of the HP Officejet 7310 however, the current system of securing the standard ink cartridges has two doors that won’t allow for a larger cartridge to be placed.

A revision we would make would be to eliminate the door system and install a more snap based system as seen with other, even HP, printers. For this snap system all the user would have to do is slide the cartridge into place and push up. To take the cartridge out, simply push down and slide out. This will allow the extra large cartridges to be installed. Seeing as HP already has this system in place on some of its other printers, it wouldn’t take too much effort to simply transfer the design to the 7310. The carriage is largely independent of other parts, only coming in contact with the shaft it rides on, and changing it wouldn’t affect any other systems.

This revision is societal in that the ink cartridges will need to be changed less often, as well as making the carriage more compatible for other cartridges. There is also an economic side. For the company building the printer, a snap method will eliminate the door parts, lowering manufacturing cost. For the consumer, the unit price of the larger ink cartridges is less than the standard cartridges, reducing expenses. Environmentally, using the larger cartridges decreases the amount of waste produced when the ink runs out.

Figure 4: Double input trays

Additional Input Tray

Most consumers utilize their printers for multiple functions. Some examples include printing photos, different sizes, colors, and various materials of paper. For a person using the HP Officejet 7310, in order to use different papers they must first switch the paper within the single tray.

To make life easier for the consumer, a revision would be to add a second input tray. This will allow two different types of paper to be stored at the printer at the same time. The user would only have to select the paper from the computer instead of having to manually switch it. This would be very beneficial for businesses who frequently switch from blank paper to letterheads. Unfortunately the current model would not support a second tray. Some structural supports would have to be redesigned, as well as the outer casing. An additional roller shaft would also be needed to get the paper started, as well as another motor to power this shaft independently from the others.

This option would make the printer less economic. Adding a second tray increases material cost, as well as the new rollers and motor. Also the manufacturing cost will increase seeing as HP would have to change molds and processes in order to accommodate for the new design changes. Considering however that this printer is intended for corporations, the increases in price would be worth the societal benefits of higher performance and greater efficiency.

Main Page