Cordless drill
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Cordless Drill
Group II
Ming Huo
Scott Miller
Vishesh Nandedkar
Mark Rockwell
Product Dissection
Before doing anything else, we dissected our drill to take a look at each part up close and understand how the drill works from a technical standpoint.
The cordless drill, pre-dissection is pictured above.
Parts List
Function/Purpose:
The purpose of the cordless drill is to spin “bits”. “Bits” are the tools that go in the end of the drill and they come in many different shapes, to accommodate driving, drilling, mixing or cutting. Things that can be driven include screws with Philips heads, flat Heads or hex shaped heads. For drilling, drill bits come in many sizes, from small fractions of an inch up to about an inch in diameter. The material of the drill bits varies as well, depending on the surface being drilled in to. There are also attachments for mixing, such as egg beaters or whisks. For cutting, one could even insert small cutting wheels, though in general, the main intended use for cordless drills, are drilling and driving. The cordless drill is meant to be portable and small enough to get in tight places, making it suited for the home or automobile. It has no harmful exhaust so it may be used indoors or outdoors. We are not sure if it may be used under water, but assume it is not ever meant to be. Aside from making holes, it is also used to bind materials together with screws, or can be used to drill weaker objects such as stripped screws or broken locks. It is often used for installation of hardware, or removal of covers or anything really which is secured in place with screws. It can even be used to unscrew completely stripped screws, by tightening the chuck around the screw head and putting the drill in reverse.
Inputs/Outputs:
- INPUTS: Axial force
- INPUTS: Trigger Pull
- INPUTS: Electricity (battery)
- INPUTS: Countertorque (resist what motor implements)
- OUTPUTS: Rotational motion
- OUTPUTS: torque
Use and Basic operation:
(scenario where putting screw in wall)
- Charge Battery
- Remove battery from charger
- Slide battery into drill
- Select bit/tool
- Loosen Chuck
- insert bit and tighten chuck
- select "cut-off" torque
- engage drive or gear
- Place head of screw on bit.
- Hold head of screw to bit (with hand).
- Place Tip of screw to desired object
- Partially squeeze trigger to provide low rotation-speed at first. All this while pushing axially.
- once screw's thread catch the wood, pull trigger to increase torque/omega.
- consistantly adjust to make sure bit is in line with screw.
- Let go of trigger when screw at desired location.
Different Users / Use Scenarios
- weak wrist/grip
- shaky hands
- can't push hard enough
- tightening Chuck
- Actual drilling into material
- Dead battery
- Improper/Hard surface
- Screw stripping
- Screw alignment
- Wrong bits.
- Aligning bit correctly within chuck
- Poor eyesight
- Poor hand-eye cooridnation
- Over-torquing (too soft a surface)
- Poor lighting
- no hands
- tight areas/corners (awkward shape)
- Hard time hearing maybe can't hear what's happening
- screw stripping
- overtorqueing
- not strong enought to switch between F/N/R