Group 24 - Tippmann 98 Custom - Gate 4
The purpose of this stage of the project was to show the process of reassembling the tippmann 98 custom marker. After going through this page a person with no knowledge of the marker should be able to properly reassemble it following the step-by-step guide given. Also design revisions were proposed in order to improve the workings of the marker.
Cause for Corrective Action
The way this group has been working together is phenomenal. After the previous gate we are very pleased with our work. We put in many hours in order to perfect our work and make it easy to follow. We were told that our work on the wiki page was getting disorganized so we made it a goal to make this not happen again. So in the previous gate we made the section titles obvious so if the reader was looking for something specific it would not be difficult to find.
The group is continuing to meet at the given time of 5 after each class on Monday. We also have had some un-planned meetings during the week but with the good communication between each member this has not been a problem.
As the final weeks approach school we are going to continue to meet on Mondays and try to complete our fifth gate before finals begin. To achieve this we are going to work together on revising the gates so they can be finalized in a reasonable amount of time.
Below is a difficulty scale that was used for each individual step. The difficulty was based on tools needed, time for completion, and force used:
1-Minimum: This step required little to no force to complete the task at hand. It would take a short amount a time and only one person was needed. The components being assembled could be easily be put together with your hands with little to no confusion.
2-Adequate: This step used a moderate amount of knowledge to be assembled. A tool could be used or multiple hands were needed. More time was needed in this step, but it wouldn’t require more than one person.
3-Maximum: This step required directions or pictures in order to be completed. The components being assembled needed precise position and order. This step needed the most time and more care was given in order to prevent any further problems it could present.
Challenges During Reassembly
During the reassemble process the group encountered only a few challenges. The first problem we ran into was how to describe the reassembly process in words so we could place them in the table above. It was very simple for us to do with our hands and to describe it verbally but when we were typing up the table we struggled making it clear to the user. What was most difficult was describing the section of the marker where the parts needed to be placed. We decided to input pictures containing arrows on them in order to make our descriptions more clear. The last problem we had was putting the front sight onto the marker. The small spring that is located under it was hard to hold in the correct position. We learned that there is a specific order in which you have to put the spring and front sight on. You had to first position the spring in the marker and then put the sight on top.
Looking at the Tippmann 98 Custom paintball marker I can make assumptions as to how it was assembled. First off, all of the individual parts of the marker had to be manufactured individually, by the processes stated in Gate 3. Then they were probably brought to an assembly line, where people inserted the majority of the parts into the right side of the housing. They used workers instead of machinery because there are unique paths that need to be taken to insert the parts and connect them together. Therefore it is faster for a human to do this part of the assembly. They also used the right side of the housing because the bolts that hold the two sides of housing together are on the left side, so that side would be most likely to be added later. After most of the parts are put together, a machine probably puts the casing on top and screws in all of the bolts which hold the two sides of the housing together. This can be done by a machine because all that is needed is up and down motion, along with drilling. It would also be more efficient at screwing in the bolts than a human would be, and it would reduce the cost of labor. To complete the assembly, a person screws in the gas line to the expansion chamber and tank adapter, and then screws in those parts to the gun. After the marker is complete, they are probably put into their box and packaged in crates by a machine, to be shipped out to the retailers.
Assembly vs. Disassembly
Putting the Marker back together was remarkably similar to the process of taking it apart, except for the fact that it was all done in reverse order and in the reverse direction. While the physical processes were in reverse order, it did seem that a lot more attention was required when putting pieces together versus taking them apart. During the disassemble process the marker, once opened; only required minor attention to detail. Whereas it only took minimal effort to pull and unscrew the marker into pieces, it took a little more care and knowledge of function to put the marker back into order. For example when working with the trigger system, during disassemble all you had to do was lift the parts out of the marker. But when placing it back into the marker you would have to look at pictures in order to know which pins you have to connect the sear spring too. Certain placements during reassemble were critical to the function of the marker, but were, for instance, less critical when being removed.
One design revision to the marker that we thought
would improve the marker would be a visible velocity adjuster. The
current velocity adjuster is not easy to change quickly, and is hard
for the user to visualize the changes it makes. The way it works is by
turning a screw either counterclockwise for higher velocity of the
shot, or clockwise for lower velocity using an allen key. The problem
with this is it is nearly impossible to understand how much a user
must turn it to get a certain numerical value for feet per second and
it is not easy to change in the field of play.A better way of doing
this would be to have a knob located where the screw is now and have a
visible digital screen. By having a knob on the outside of the casing
the user can change it using their fingers at any time during a use.
It also would display an exact number for the speed the paintball is
being fired at. The location of the screen is shown in figure two and
it would be powered by light-emitting diode (LED). This small display
would not be too bright so the marker won’t to stick out in the dark.
Societally this would be a huge factor for the marker; it would make
it much easier to use because there would have to be no estimation of
the velocity. Also with a visible screen it could add a better look to
the marker which means the marker will sell more. An environmental
impact would be that the user will have more precise shots now, so
fewer shots will be taken. Therefore not a lot of carbon dioxide will
be released into the environment.
A possible revision to the design of the Tippmann 98 custom paintball marker would be the incorporation of a bipod/adjustable handle. The main purpose would be to allow for the user to adjust the handle into the most comfortable position for them. Also, having a bipod that could slide out of the handle would allow a person to stabilize the marker on a surface. The handle/bipod would attach to the expansion chamber and could be extended out by releasing a lock. The main factors that would be addressed with this revision would be global and economic. In rural areas paintball is played in the woods often with homemade bunkers made out of wood or other scrap materials. The bipod would directly benefit those individuals and areas where “woods ball” is often played. The availability of an adjustable handle would allow the company to advertise the versatility of the marker to any sized consumer. Most of the time there isn’t much of a difference between similarly priced markers. Therefore, little things such as added comfort would put the marker above the rest. Also, an environmental factor would be that the increased stability would lead to better accuracy which would cut down on the number of missed shots that stay on the ground.
One component that we would like to change would be the
energy used to power the marker. Right now carbon dioxide is used and
we would like to change that to a battery pack. We feel that the
carbon dioxide is harming the environment and costing the user too
much. After a few hours of play you have to fill up your tank again
which is costing you money every time. Also once a shot is fired,
excess carbon dioxide is released into the air which is a waste. So by
installing a rechargeable battery it will reduce all of those harmful
productions. The battery would call for a change in the bolt system
because the energy powering it is changed. The changes would be that
the power tube now needs to made into an electric signal. So when the
trigger is pulled a circuit is completed and then the bolt would be
released. The rest of the bolt would just stay the same. This initial
change would cost a lot of money but the long term advantages will
make it worth it. The looks of the overall marker would change but
this could be in advantage to society. Consumers will like the change
of design because the carbon dioxide tank won’t be at the bottom of
the marker any more, making it look more like a real gun. It should be
known that since all of the electrical components are inside of the
marker that the rain or conditions of play would not affect the
overall output of the maker. Also this will change the weight of the
marker because the heavy carbon dioxide tank is removed from the back
of the marker. This makes it easier to maneuver because it is lighter
and also there is nothing hanging of the back so it can be held with
one hand and you wouldn’t have to worry about the tank hitting
anything since it will not be there.