Group 28 - Gate 2 - Product Dissection - 2012
The purpose of this gate is elaborate on the dissection of this process of this product and the analyze a few of component interaction within the paintball marker. An inventory of all the component/parts and the steps taken to separate each one individually will be documented. Furthermore, a detailed discussion of how these systems with each other will be discussed at a sub-system level.
Preliminary Project Review
Cause for Corrective Action
Group 28 approached Gate 2 with enthusiasm and a well thought out plan to spread out the workload leave time for revision, in order to prevent what happened in Gate 1 and the Product Proposal. An outline/timeline was created to offer a visual representation of the estimated workload, but this may seem to be a reminder of deadlines more than anything, currently. The main purpose of Gate 2 was to demonstrate the ability dissect the product in an orderly manner and document that dissection process effectively. The week following the deadline of Gate 1, Group 28 held meeting during every scheduled time with at least 3 group members always present for these meeting. The missing group member usually had a time conflict with an important appointment, had difficulty managing his time, or had a communication breakdown among the rest of the group members. While missing meetings was heavily frowned upon, group members showed concern for missing progress updates or any information vital to completing assignments or projects. Also, Emphasis among all group members was put on attending group meeting to demonstrate the desire to increase progress on Gate 2. The meeting consisted of going over the anticipated schedule for Gate 2 and planning for any group assignments in the MAE 277 class. Our first meeting planned the most appropriate time for the Lead Disassembler and Data Compiler to dissect the product, and the tasks that would follow that dissection. The dissection was achieved with documentation that looked adequate prior to writing up the wiki. Unfortunately, other academic aspects and time mismanagement delayed the meeting that followed the dissection for about a week. The first meeting after the dissection, the lead disassembler and data complier provided feedback that the dissection was one small step from being complete, since an extra was necessary to accomplish the last step. With a reminder of the deadline, this last step for dissection was scheduled to be done as possible. nevertheless, the final week before the deadline was filled with additional dissection in order to satisfy the Gate requirements and a hurried typing of the wiki; once again mismanagement of time and an inability to abide to a schedule left Group 28 rushing to get Gate 2’s dissection documentation and technical report finished.
Overall, the proposed plans to complete Gate 2 were not followed properly, thus Group 28 encountered some ruts along the way. These problems need to be addressed at the next meeting in order to prevent this from occurring to on Gate 3, otherwise the quality of Group 28’s work will continue to decline. The poor performance on Gate 1(as well as actually re-doing it) will need to be re-iterated in order to grasp what Group 28 is doing wrong and reevaluate how to approach the project’s Work.
Difficulty of Disassembly
The difficulty of the entire disassembly had numerous steps that required different tools and procedures to properly separate each sub components without causing damage.
Prior to outlining this process, we will provide a way to interpret the varying levels of difficulty through the use of a simple rating system.
Rating Scale:Difficulty of Procedure
|Rating Symbol||Degree of Difficulty||Practical Example|
|+||Very Easy - Any task rated here can be accomplished almost immediately and with little effort. No physical exertion or advanced coordination is necessary. The product has no chance of being damaged.||Pressing a button.|
|++||Normal - Any task rated here will involve a relatively simple procedure using coordination of the hand or use of simple tool(screwdriver, pliers, forceps, etc.). The ability to use a tool proper or decent hand coordination is necessary. If the procedure is not done properly or if too much force is applied, the product may be damaged.||Unscrewing a screw with a screw driver.|
|+++||Moderate - Any task here will involve a procedure that requires prior knowledge on how to properly approach the certain scenario. Whether by or with multiple tools, the procedure will require aptitude and higher levels of coordination to disassemble the product in a timely manner. Improper usage of tools or excessive force may result in minor to major damage of some components.||Removing a support bar of a frame with the use of vice grips, a crescent wrench and physical strength.|
Tools used During Dissection
The Following tools were used during the dissection:
- Phillips head Screwdriver (small & medium sized)
- 1/8” Allen Wrench
- 11mm Wrench
- Physical Interaction with Hands
Outline of Disassembly
The following table outlines the disassembly of the Tippmann 98 Custom Paintball Marker. The tools used, difficulty, image, and what action required for step will be mentioned in the table to allow someone to easily replicate the disassembly.
Product Dissection Evaluation
The dissection was carried out relatively well with the knowledge of Group 28's member who was most proficient with paintball markers. However, since so many small components were inside the casing they were prone to falling and being jostled if the marker was mishandled. After we noticed that screws and small parts were compiling during the dissection, we made sure to designate a separate area to clearly separate all the small for one another and prevent them from moving anywhere. Most steps to take apart the marker required only a simple Phillips head screwdriver or Allen Wrench and then only hands to easily remove the parts. Thus, the entire process was relatively easy until the screws that held the power tube and valve body to the marker casing. These screws were secured with an adhesive Loctite which did not allow for a normal removal; a great deal of force to be applies in order to loosen the screws. At first we had not recognized the red adhesive with those certain screws, but after removing the casing, we speculated that the manufacturers applied adhesive to these screws in particular to prevent the valve body from moving.
The Tippmann 98 Custom paintball marker’s disassembly was easy for the most part and did not require great ingenuity to outline the necessary procedures for disassembly. This is most likely due to one of this product’s key feature: customizability. The Tippmann 98 custom is widely recognized for being a very standard model paintball marker that allows owners to customize and provide routine maintenance easily for the marker. With this is mind, dissecting the product for analysis is not much different than if an actual user wished to clean the marker. However, our analysis wishes to evaluate each individual part and the subsystems composed of those parts, while also acknowledging the particular arrangement and interaction of these components. While this marker represents a very user-friendly product, the manufacturer has clearly set a limitation disassembly at the valve body/power tube by making it exceedingly difficult to remove it from the maker casing; while the power tube and valve body can separate from the casing, the valve body is welded shut, so disassembly would not be an easily reversible process.