Group 20 - Black and Decker Jig Saw-Gate 1
In the following report, several organizational aspects will be covered. The team organization will be discussed; what role each member will play, and what their specific responsibilities entail. In addition, there will be an outline for the remainder of the project, in order to be prepared for the upcoming deadlines. Finally, a list of profiles will be discussed, giving greater detail to the Black and Decker Jig Saw.
Points of Contact
- Matt Klotzbach, Project manager: firstname.lastname@example.org
- Michelle Moore, Communication Liaison: email@example.com
Every week the team will meet immediately after class on Mondays in the Capen Cafe. At these meetings the members will voice their opinions on the current status of the project and discuss if everyone is contributing equally. In addition, the team will review upcoming tasks, future deadlines, and delegate responsibilities. Additional meetings will be added as needed to complete the tasks. These meetings will last around an hour, depending on the amount of information we need to discuss and how many issues we have to resolve. If we do have issues we will be discussing them as a group and coming up with a result collectively. If we have any major issues we cannot resolve as a group Matt Klotzbach the project manager will personally handle them and contact the instructors if it is necessary for a third party to handle the situation.
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- Table 1-1: Group member information
The Head Technician will oversee the dissection and reassembly of the Jig Saw. He will ensure that all tools are used correctly and all safety measures are followed.
Other than our Head Technician, everyone will have the role of Technician's Assistant. This means that every member will have a hand in using the necessary tools in order to disassemble and reassemble the Jig Saw.
Curator of Parts
The curator of parts will be responsible for the location of all parts removed from the Jig Saw. He will be cataloging each part to prevent misplacing components.
Project/ Operations Manager
The Project Manager will organize additional meetings and solve internal problems within the team. He will be responsible for overseeing the progress of the group and reporting to the professors.
Assistant Operations Manager
The Assistant Operations Manager will be in charge of the operation within the group if the manager cannot be present.
The head Photographer will be in charge of taking pictures for the group. He is required attend the disassembly and reassembly meetings to photograph each step.
This individual will share the responsibilities of the Head Photographer.
The Communication Liaison will be responsible for the technical communication for the group. She will collect the documents from the other members and compile it in a technical report.
The Wiki specialist will oversee the presentation of the Wiki, ensuring that it is accurate and up to date.
Computer Modeling and Drawing Specialist
The Computer Modeling and Drawing Specialists will work together to recreate parts with a CAD system or a technical drawing.
Over the course of the Semester, the group will work diligently to disassemble and reassemble the jig saw with ample documentation of every step. To disassemble, the team will collectively meet twice a week in the lab. We will make every effort to all attend so that information and knowledge are not lost in communication. The procedure will be as follows:
- The Head Technician and Technical Assistants will remove a part
- The Head Photographer and/or Assistant Photographer will document the placement of the component
- The Curator of Parts will assign the component a number and seal it in a plastic bag, writing the number and part on the outside of the bag
- The Communication’s Liaison will record the information from the Curator of Parts as well as the tools and procedures used to remove the part
This procedure will be used throughout the entire disassembly process. Adjustments may be made depending on its success. In addition, this process will facilitate the reassembly as the team will have created step by step instructions that include the tools used and picture support. The above procedure will be duplicated once the team is ready for reassembly, with the only noticeable change being to replace a part, rather than remove it.
- Philips head screw driver
- Flat Head screw driver
- C Clamp
Our product is a jigsaw developed and built for homeowners in 2005 by Black and Decker, a brand name tool manufacturer. This product was intended to be sold for use by hobbyists and do it yourselfers, for home construction and small occasional projects not for commercial everyday use. It was developed for homeowners to purchase at a reasonable price. It was to impact the market by producing a product that was new, equally powerful and cheaper than most saws on the market.
This particular jigsaw considered many things during the development of this product. The price of this product was a major concern when Black and Decker designed it. The price of this product new in 2005 was around $30; this takes the economy into consideration. Black and Decker put a 4.5 amp motor inside of this jigsaw they also made it corded, and made everything that they could out of plastic. All of these were economic concerns. The 4.5 amp motor that they put in this jigsaw provides adequate power to do the job at hand, but it could be bigger and more powerful, the motor is smaller and more compact all around aiding in the lower cost of the product which directly effect the consumer. They decided to make it corded instead of making it cordless and battery operated. Making it battery operated would have made it portable and more maneuverable on the job but it would have increased the cost of the overall product, and if a battery charger was not included with the product it would force the consumer to purchase an additional product also making it more expensive and less desirable for its intended market, which not only considers the economic effect but also the social aspect. Making it corded instead of cordless factors in the environment as well. Making everything they possibly could out of plastic instead of using a more durable better material makes it not only lighter but cheaper which again aids in the making this product as cheap as possible for the consumer.
Being a corded jigsaw they would have to consider what type of plug they put on it. Plugs in other countries are different than the ones here in the United States, which takes the global concern into consideration. This product was designed for a specific region also for a specific culture. This was designed for a group of people that use electricity to do everyday jobs unlike the Amish, also for regions of the world that have sufficient electricity wherever it is being used. This product was designed for North America and specifically The United States and Canada. These are all concerns that were considered during the development of this product
The Black & Decker JS510G is designed to cut various materials including wood, plastic and metal. The blade is detachable and can be changed to accommodate different materials. The configuration of the saw allows it to be very agile and make irregular cuts which are typically not possible on a band saw or table saw.
Home vs. Professional Use
The Black & Decker JS510G is considered to be an entry-level saw for use around the home. It’s relatively low price allows it to be affordable by most. While it is ideal for light to moderate use around the home, it lacks the power and durability required for professional use. Some users have reported difficulty cutting through harder woods such as mahogany and maple.
This jigsaw excels at cutting most relatively thin materials. Its portability and maneuverability allow it to make cuts in difficult to reach areas.
The main types of energies that are used by the jigsaw are electrical and mechanical. Electricity is imported to the system by means of an electrical cable. This is used to power a motor. The motor produces rotational energy. This is converted to linear motion, known by the observations of the blade. Presumably the motor is connected to a gear train which would increase the torque. Eventually the gears are connected to a cam that would cause linear motion. This linear motion will directly connect to the saw blade.
The handheld electric jigsaw is moderately complex in design. There are four main components. These are the cord, the motor, the gear, and the shaft assembly. The cord carries the electricity from the outlet to the motor. The motor then turns that electrical energy into rotational mechanical energy. The motor is connected to a gear which causes the shaft assembly to move the blade up and down.
The individual components themselves are not very complex since there are not many parts involved. The cord is a set of intertwined wires with plastic insulation. This insulation protects the operator from possible electric shock. The motor is a coil of wire, a magnet, a casing and a small gear. The gear is a solid piece of steel with cogs around it. The shaft assembly is a shaft, some washer-like pieces, and the blade-holder.
The component interactions are simple as well. Electrical energy is changed to mechanical energy which moves the rest of the parts.
There are many different materials that are visible on the outside of a jigsaw. They are the plastic casing, the base, the steel blade, the plastic safety, and the plastic trigger/switch. Based on the complexity profile, we can speculate inside lies a few gears, some springs, and many springs, all of which are metal. All the metal used in steel. The plastic used in the casing appears to be Polypropylene. This is a moderately durable type of plastic that can withstand most impacts and scratches that it might endure during use.
User Interaction Profile
The jigsaw is operated by first plugging it in to a power outlet. The saw is applied to the material being cut and the trigger is pulled. There is no variable speed function of the saw, meaning that when a light to medium amount of pressure is applied the blade fully engages. It is relatively easy to maintain pressure on the trigger without fatigue. The guide on the bottom as well as the blade assembly is quickly disassembled meaning that maintenance and blade changes can be done very easily.
How Intuitive are the Interfaces? The user interface is very intuitive. As one would guess, depressing the trigger engages the blade. Maintaining blade speed only requires the trigger be fully depressed.
Ease of Use:
The saw is very easy to use. All that is required is a power source and the trigger to be depressed. It also features a tool-free system to change the blades. Extra blades can be stored right in the saw.
The only maintenance required is to occasionally change the blades as they wear out. It is also beneficial to change the type of blade according to the material that is being cut to avoid premature dulling of the blade.
Product alternative Profile
The jigsaw is well suited for small projects that require straight or curved cuts. The objects that are to be cut must not be thicker than the saw blade is long. There exist products that can be used instead of the jigsaw that are also produced by Black & Decker. Other such products include but are not limited to circular saws, reciprocating saws, and table saws. Each one of these alternatives to the jigsaw has advantages and disadvantages.
Circular saws in general are faster than jigsaws. The saw is only rotating in one direction so it is relatively stable to hold and use compared to the jigsaw or reciprocating saw. The circular saw’s main disadvantage is that meant to be used linearly, it does not maneuver corners.
Contrarily, a recripical saw can round corners to some extent but has a larger turning radius compared to a jigsaw. Also the vibration is slightly more than that of the jigsaw. The vibration is notable mostly with extensive use of both tools. The reciprocating saw is more powerful than the jigsaw. But with the excess power, there is excessive size. The reciprocating saw is very bulky and heavy with respect to the jigsaw.
The table saw is largest of these alternative products. Not being easily moved is definitely a hindrance but it is very powerful. It can make some projects simpler. But this stationary circular saw has the same disadvantages as the portable circular saw. It can only cut in straight lines but it is easier to use then the portable circular saw.
The most economical Black & Decker saw type, by means of averages, would be the circular saw. Estimating an average of $63 it is not extremely a better buy considering the average Black & Decker jigsaw was $76