HP Deskjet 600c

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Figure 1: Fully dissected product


This inkjet printer is manufactured by Hewlett Packard, and is used to transpose displayed digital data onto a physical medium.

How It "Ticks"

The computer sends a data stream to the printer through a serial, or usb cable. The control unit inside the printer deciphers the data and instructs the mechanical components to act accordingly.

pplied to the shaft. Assuming the grinder is being used constantly the bearing would last 1.83 years before failure. If the grinder was being used six hours every day, 365 days a year then the bearing would last 7.33 years. If the grinder was being used six hours a day, five days a week, the bearing would last 10.26 years.

For the force requirement on the gears to rotate the grind wheel at 10,000 RPM, the power consumption of the grinder was looked up. From the power consumption the torque was calculated to be 0.315 Nm, which equates to about 2.61 lbs of force on the workpeice from the grind wheel. This calculates to 12.4626 N of force at the gears to rotate the grind wheel at 10,000 RPM.

To calculate the stress in the gears, a stress equation was used from the Fundamentals of Machine Compoents Design by Robert C. Juvinall. The velocity factor was caluated with the assumption that the gears were precision shaved and ground. The overload factor was calculated with the assumption that the source of power is uniform and the driven machinery is assumed to have moderate shock. Both gears were overhung, which gave a mounting factor of 1.25. The calculated stress in the smaller gear was 613.601 PSI and the stress in the larger gear was 442.438 PSI.


The table belows lists the Bill of Materials for the disposable camera:

Table 3.1: Disposable Camera Bill of Materials
Part # Part Name # Category Function Material Picture
1 Bottom Disk Holder Support Element Attaches to bottom disk holder to lock grinding disk in place Metal
2 Screws Support Elements Attach various components to one another Metal
3 Top disk holder Support Element Attaches to disk holder to lock grinding disk in place Metal
4 Washer Support Elements Attacjes grinding shield to the grinder Metal
5 Handle Structural Components Provides grip and stability for the grinder Plastic with metal screw on end
6 Griding Shield Structural Components Protects operator from any parts that may get grinded off from work material Metal with greese lubricant
7 Transmission Transmission Transfers energy from horizontal plane into vertical plane for grinding wheel Metal with grease lubricant
8 Internal Motor Assembly Output Converts the electrical energy into the horizontal mechanical energy Metal, plastic, and ball bearings
Camera Spindle.JPG
9 Outer Motor Assembly Input Creates the electromagnetic field that provides the power for the tool Metal, wires and plastic
10 Transmission Casing Structural Components Attaches the transmission to the motor and allows the shaft and transmission to run smoothly Metal Composite with grease lubricant
11 Washer Support elements Attaches the motor to the gears. Metal
12 Hypoid Gear Motion Conversion Elements Transfers power from shaft to transmission. Metal
13 Drill handle and electrical circuits Input and support elements Provides the electrical power to the motor and turns the grinder on and off. Plastic and Electrical Circuits

<embed src="http://www.youtube.com/v/Ocex8YbNa_o" type="application/x-shockwave-flash" width="425" height="350"></embed>

Right-click here and select "Save Link As" to download the video (.avi)