Group 24 Gate 1
Outlined in this section is the work proposal and the management proposal. The work proposal pertains to the dissection of the product in a physical sense. The management proposal includes information that outline our groups responsibilities, meeting plan, and plan for group conflicts.
For us to reverse engineer the black and decker reciprocating saw, we will need to set a time each week when all five members of our group are free. We will need to put at least three hours a week aside to working on this project together. Once we agree on a time of the week to work, we will then need to acquire the tools necessary to dissect the reciprocating saw. Upon further inspection, we have determined that we will only require some basic hand tools to take the saw apart and then back together. We believe that we will only require different sized screwdrivers and different types of screwdriver bits such as Philips, flat head, and Torx drive bit. We already possess all the tools necessary for the dissection of our project. For us to be successful in the dissection and reassembly of the reciprocating saw, it is extremely important that we do not lose any of the parts. To prevent that from happening, one member of our group will be responsible for making a catalog of all the different parts and putting them in zip lock bags or other containers for storage. Another member of our group will be responsible for making a list of all the steps that we take in the disassembly of the saw as well as taking pictures of the procedure as we go. This is also very important because we will need this information to help us put the reciprocating saw back together.
Strengths & Weaknesses
|Connor Devine||Works well with hands and tools. Technical background.||Trouble putting ideas down on paper. Minimal CAD experience.|
|Jordana Fish||Experience with CAD, mostly in only 2 dimensions. Organized and works well with others.||Spelling and Grammar. Not much mechanical hands on experience.|
|Matt Juskiewicz||Experience in CAD as well as hands on tasks.||Never used Wiki before.|
|Daniel Perez||Experience in the work field, familiar with CAD.||Busy work Schedule.|
|Rick Schlehr||Some Mechanical hands on experience. Some experience with CAD||No previous use with wiki|
- Remove the screws that hold the outer casing part and then separate the casing.
- Remove the trigger and the wiring.
- Remove the motor and reciprocating mechanism from the casing.
- Remove the metal plates to get to the reciprocating mechanism.
- Take apart the motor from the reciprocating mechanism
- Dissect and evaluate the different components of the saw
- Carefully reassemble the reciprocating saw
This is a description of how our group will manage ourselves throughout the duration of the project. This includes who is in charge of certain aspects of the project, a description of each group member, and a basic outline of how everything during the project will be handled.
Upon getting our group we all exchanged emails and figured out when the best times to get together during the week would be. It turned out that we were all free on Thursdays from 5pm-8pm; therefore, we decided that would be our weekly meeting time. Any other additional meetings have and will be decided either in class, via email/the group google doc, or at the weekly meeting. Our meetings will mostly be held in Greiner since it has many quiet areas to work in and three of the five of us live there, giving us access to any additional materials if and when they might be needed. Any additional meetings between members of the group will be discussed during group meetings where everyone is present or through email/the group google doc. When dissection and reconstruction occur all group members will be present and those meetings will be held in the dissection lab.
At our last meeting we divided up the following roles:
|Connor Devine||Project Manager||Keeps the group updated on tasks, assignments, and deadlines. Assigns different tasks to each individual group members. Also is in charge of organization of the entire project as well as the group wiki firstname.lastname@example.org|
|Jordana Fish||Communication Liaison||Contacts all group members with the various different information from the other members of the group. Contacts any other necessary people. Also helps out with the wiki email@example.com|
|Matt Juskiewicz||Recorder||Takes the necessary minutes at all meetings. Also documents the dissection and reconstruction processes with written notes and firstname.lastname@example.org|
|Daniel Perez||Technical Researcher||Looks up any additional information for the group to ensure that everything stated on the wiki and done during the dissection and reconstruction processes. Also is in charge of updating the email@example.com|
|Rick Schlehr||Technical Lead||Leads the group in the dissection and reconstruction process; what each member should do, any safety measures, making sure dissection and reconstruction are completed fully and firstname.lastname@example.org|
Any and all conflicts that cannot be resolved with a quick group email will be discussed at the next upcoming meeting where all group members are present. If no compromise or solution can be agreed on the next step would be to email or schedule a meeting with the professor for further help with the situation.
In this section, our group will familiarize ourselves with the reciprocating saw by completing a thorough analysis without actually dissecting the product. By doing this, we hope to collect enough valuable information to successfully dissect our product.
This specific reciprocating saw by Black and Decker was developed in 2005 according to the product’s manual. Economic concerns at the time of development include the current and projected costs of materials. This concern also corresponds to global concerns of decreasing material reserves left on Earth. While a construction material may be economically feasible now, that same material may be harder to produce, driving up prices in the future. Relatively cheap but dependable metals and plastics were utilized to keep the manufacturing costs down while still producing a dependable reciprocating saw. This product was intended to be sold primarily in North America. The intended impact on the consumer and the society in which it is used was to become the industry standard in dependable, quality performing reciprocating saw. This saw was meant to be your first and only choice when it came to dependable cutting power was needed.
The intended uses of this product include the sawing of materials. This product was intended for both household and professional use. This product performs the jobs of sawing wood and nail embedded wood, light to heavy gauge metals, copper, aluminium, brass, cast iron and steel; drywall, plaster, plastics, rubber composites, fiberglass, and pruning. To achieve different objectives, the saw's blade may need to be swapped out or the speed control adjusted. The saw may need to be held in a different position also.
Types of energy used by this product are mainly electrical and human power. Energy is imported into the system by use of an electrical cord. The cord is plugged in to an outlet to provide electricity to operate the saw. The different types of energy transformed and modified are electrical and mechanical. Electrical energy is turned into mechanical energy via a motor. The mechanical energy is converted from rotational to linear motion in order to drive the saw blade.
Our group has decided from observation that there are 11 components that make up the saw. Individual components complexity ranges from a simple trigger switch for the trigger control to the semi-complex blade receptacle. Component interactions relatively simple based on observation.
Materials that are clearly visible are: plastic, aluminum, steel, and rubber. Material that is not visible but is presumed present is the copper used in the electric motor.
User Interaction Profile
In order to test how a user would interface with our product, we created a procedure by which each member of our group, as well as a few non-technical participants, had to complete. Basically, we had each person hold the reciprocating saw, pull the trigger, and test out the variable speed options. Since we do not have a blade, this is as far as our testing went. After completion, the feedback was that our product was easy to use, given the fact that the only necessary action was to pull the trigger. The product does get slightly more difficult to hold steady and keep stable as the speed at which the reciprocating mechanism moves increases. Other than that, the overall consensus was that the product was self-explanatory in terms of how it is to be used. Maintenance on this product is very minimal with the only part needing to be replaced after time being the blade itself. It is not battery operated so changing batteries will never be a concern. Overall, this product is very easy to use and requires little to no maintenance along its lifespan.
Product Alternative Profile
The reciprocating saw is a unique tool because of its short stroke that allows the user to cut around spaces with minimal working room. Some alternatives may include a hand saw or a jigsaw. These two tools may seem to be functionally similar but they have their differences that make the reciprocating saw the prime choice for certain jobs. Some advantages of using these alternatives is that they are more economically friendly. Secondly, they may be more convenient in terms of not having to plug them into an outlet to draw electrical power (hand saw) or they may be lighter and easier to use. On the other hand, some disadvantages include not being able to reach tight spaces due to a longer stroke as opposed to the short stroke you get from a reciprocating saw. Situations in which you may want to use an alternative may include working on a project where there are not tight spaces and a hand saw can be used to do the same job as a more expensive reciprocating saw. Cost and stroke length are the two biggest factors when comparing the product and its alternatives. Depending on the make and model, reciprocating saws and jigsaws can vary in price but will always be more expensive than a simple hand saw. The reciprocating saw gives the user a short stroke for reaching tight spaces whereas a jigsaw and hand saw require a long stroke to be used properly, therefore rendering themselves useless in tight areas.