Card shuffler 3
From DDL Wiki
(→Design for Assembly [DFA]) |
(→List of Parts) |
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=List of Parts= | =List of Parts= | ||
+ | '''Parts list table | ||
+ | {| class="wikitable" border="1" | ||
+ | |- | ||
+ | ! Part Number | ||
+ | ! Name | ||
+ | ! Quantity | ||
+ | ! Mass (g) | ||
+ | ! Subassembly | ||
+ | ! Function | ||
+ | ! Material | ||
+ | ! Manufacturing Process/ Purchased Component | ||
+ | |- | ||
+ | | 1 || Battery cover || 2 || 7 || Base || hides and holds the battery || plastic || injection molded | ||
+ | |- | ||
+ | | 2 || Retaining shield || 1 || 31 || Card catcher || holdes cards in the card catcher || plastic || injection molded | ||
+ | |- | ||
+ | | 3 || Screws (plastic top) || 4 || <1 || Top || holds the top assembly in place || steel || Catalog Purchase | ||
+ | |- | ||
+ | | 4 || Clear plastic top || 1 || 24 || Top || To view card catcher from above || plastic || injection molded | ||
+ | |- | ||
+ | | 5 || Sticker || 1 || <1 || Top || Aestetic || NaN || NaN | ||
+ | |- | ||
+ | | 6 || Shiny metal bracket || 2 || 5 || Top || Allows single card flow || Aluminum || NaN | ||
+ | |- | ||
+ | | 7 || Triangle card angler || 1 || 7 || Top || angles cards downward || Plastic || NaN | ||
+ | |- | ||
+ | | 8 || Screws (triangle and clear top) || 2 || <1 || Top || holds the triangle and clear top together || Steel || Catalog Purchase | ||
+ | |- | ||
+ | | 9 || ^Associated washer || 2 || <1 || Top || Distribute load from screw || NaN || Catalog Purchase | ||
+ | |- | ||
+ | | 10 || screws (Battery compartment) || 4 || <1 || Base || holds base to motor assembly || NaN || Catalog Purchase | ||
+ | |- | ||
+ | | 11 || screws (long) || 4 || <1 || Base || holds base to main structure || NaN || Catalog Purchase | ||
+ | |- | ||
+ | | 12 || base || 1 || 88 || Base || holds motor assembly and battery compartment || NaN || NaN | ||
+ | |- | ||
+ | | 13 || screw (operating lever + base) || 1 || <1 || Base || holds the operating lever to the base || NaN || Catalog Purchase | ||
+ | |- | ||
+ | | 14 || lever washer top || 1 || <1 || Base || top washer in top of lever mechanism || Al || Catalog Purchase | ||
+ | |- | ||
+ | | 15 || lever spacer || 1 || <1 || Base || separates metal contacts || plastic || Catalog Purchase | ||
+ | |- | ||
+ | | 16 || rivots (battery spring) || 4 || <1 || Base || connect spring to metal battery contact || brass || Catalog Purchase | ||
+ | |- | ||
+ | | 17 || springs (battery) || 4 || <1 || Base || negative pole of battery || NaN || Catalog Purchase | ||
+ | |- | ||
+ | | 18 || lever metal contacts || 2 || <1 || Base || completes circuit when lever is depressed || Al || NaN | ||
+ | |- | ||
+ | | 19 || large battery contact plate || 2 || <1 || Base || contacts battery(+ and - pole) to circuit || Al || NaN | ||
+ | |- | ||
+ | | 20 || small battery contact plate (+ end) || 2 || <1 || Base || contacts battery(+ pole) to circuit || Al || NaN | ||
+ | |- | ||
+ | | 21 || small battery contact plate (- end) || 2 || <1 || Base || contacts battery(- pole) to circuit || Al || NaN | ||
+ | |- | ||
+ | | 22 || Operating lever || 1 || 4 || Base || User operated lever to activate shuffler || plastic || NaN | ||
+ | |- | ||
+ | | 23 || screws (holds gear casing together) || 4 || <1 || Gear || Holds gear casing together || steel (yellowish coating) || Catalog Purchase | ||
+ | |- | ||
+ | | 24 || screws (holds gear box to the gear stand) || 4 || <1 || Gear || Holds gear box to the gear stand || steel (yellowish coating) || Catalog Purchase | ||
+ | |- | ||
+ | | 25 || white wires || 4 || <1 || Gear || connected battery contact to motor and lever to battery || NaN || Catalog Purchase | ||
+ | |- | ||
+ | | 26 || black wires || 2 || <1 || Gear || connected motor to motor || NaN || Catalog Purchase | ||
+ | |- | ||
+ | | 27 || outside housing || 1 || 252 || Housing || contains all sub-assemblies || plastic || NaN | ||
+ | |- | ||
+ | | 28 || platform springs || 4 || <1 || Card catcher || holds up platform on which the shuffled cards rest || steel? || Catalog Purchase | ||
+ | |- | ||
+ | | 29 || gear stand || 2 || 10 || Gear || holds up gear assembly || plastic || NaN | ||
+ | |- | ||
+ | | 30 || gear box (L-shaped) || 2 || 6 || Gear || holds gears || plastic || NaN | ||
+ | |- | ||
+ | | 31 || gear box (planar) || 2 || 6 || Gear || holds gears || plastic || NaN | ||
+ | |- | ||
+ | | 32 || gear shafts || 6 || <1 || Gear || Holds and provides axis of rotation for gears || plastic || NaN | ||
+ | |- | ||
+ | | 33 || Gear || 2 || <1 || Gear || Changes torque/rate of rotation from motor output || plastic || NaN | ||
+ | |- | ||
+ | | 34 || Gear || 2 || <1 || Gear || Changes torque/rate of rotation from motor output || plastic || NaN | ||
+ | |- | ||
+ | | 35 || Gear || 2 || <1 || Gear || Changes torque/rate of rotation from motor output || plastic || NaN | ||
+ | |- | ||
+ | | 36 || Gear || 2 || <1 || Gear || Changes torque/rate of rotation from motor output || plastic || NaN | ||
+ | |- | ||
+ | | 37 || Gear || 2 || <1 || Gear || Changes torque/rate of rotation from motor output || plastic || NaN | ||
+ | |- | ||
+ | | 38 || Platform || 1 || 2 || Card catcher || Holds shuffled cards || plastic || NaN | ||
+ | |- | ||
+ | | 39 || Wire leads || 2 || <1 || Motor || connects to power || aluminum || NaN | ||
+ | |- | ||
+ | | 40 || Brushes || 2 || <1 || Motor || completes the circuit while the motor is turning || copper || NaN | ||
+ | |- | ||
+ | | 41 || Housing, case || 1 || <1 || Motor || protects components || steel || NaN | ||
+ | |- | ||
+ | | 42 || Housing, cap || 1 || <1 || Motor || protects components || plastic || NaN | ||
+ | |- | ||
+ | | 43 || Magnets || 4 || <1 || Motor || spins core || NaN || NaN | ||
+ | |- | ||
+ | | 44 || Core || 1 || 1 || Motor || creates || NaN || NaN | ||
+ | |- | ||
+ | | 45 || Retaining clip || 1 || <1 || Motor || holds in magnets || steel || NaN | ||
+ | |- | ||
+ | | 46 || Washer (red) || 1 || <1 || Motor || Distribute load from screw || plastic || NaN | ||
+ | |- | ||
+ | | 47 || Washer (white) || 1 || <1 || Motor || Distribute load from screw || plastic || NaN | ||
+ | |- | ||
+ | | 48 || Shaft ring || 1 || <1 || Motor || tighter tolerance for shaft || brass || NaN | ||
+ | |- | ||
+ | | 49 || L-bracket to piece we couldn't disassemble || 3 || <1 || Motor || idek || aluminum || NaN|} | ||
= Design For Manufacturing and Assembly [DFMA]= | = Design For Manufacturing and Assembly [DFMA]= |
Revision as of 10:31, 31 January 2014
Contents |
Executive Summary
Primary Stakeholders and Product Needs
Distributor Needs
Distributor needs are concerned with the ease and safety of transport.
- Packed with smallest possible box to save space
- Packed with rectangular box to stack efficiently
- Packed robustly enough to withstand bumps and slight drops
- Batteries either not included or shipped according to U.S. Department of Transportation
Retailer
Retailers have the same needs as distributors for stocking purposes, plus some needs unique to the seller of the product.
- Packaging is colorful and intriguing to costumers
Consumer
The product is primarily aimed at amateur card players who require a system for their home. Taking this into account, consumer needs are mainly related to portability, performance, maintenance and safety.
- Small
- Light
- Small table footprint
- Battery powered
- Shuffle quickly and thoroughly
- Minimal jamming
- Quiet
- Easy to load/unload
- Shuffle anywhere from 1 to 6 decks
- Work with brand new and used cards
- Long batter life
- Easily replaced batteries
- Easily fixed jams
- Robust
- Minimal Assembly
- Affordable
- Aesthetic product
- Safe to use and store
Product Function and Evaluation
Mechanical Function
Both sides of the card shuffler are mirrored and work independently. Their only connection is through the electrical circuit which closes once the bar is depressed. The following is a description of one independent side of the card shuffler.
The main mechanical function of the card shuffler comes from the motor/gearbox components. When the circuit is completed, the motor pinion turns the gearing system shown in figure 1. The pinion gear turns the first gear on the far right. This gear then translates its motion in two ways: 1) It directly rotates the agitator gear attached behind it on the same shaft 2) It translates its motion through the second gear to turn the third gear. The third gear is attached to a rubber wheel that grips a card from the feeder tray and slides it into the collection chamber. The agitation gear is a quarter gear that slightly protrudes above the feeder tray. This facilitates a steady flow of individual cards by vibrating the stack so that no cards stick together.
Upon entering the collection chamber, the cards encounter a routing surface (Part #adsf in Figure #adfasdf) which angles the cards downwards towards the base of the collection chamber. The base of the collection chamber sits on springs which compress as more cards are shuffled. This prevents the cards from flipping over on their way down the collection chamber by keeping the top of the stack close to the entrance of the chamber. Figure #adfs shows the platform of the collection chamber in its fully extended position; as cards stack in the collection chamber, the springs compress and the platform lowers.
Preliminary User Study
Step-by-Step Product Use
1. Retrieve shuffler from storage location and place on playing table.
2. Place clear retaining shield into appropriate position through:
- a. rest base on top of spring-loaded platform
- b. depress fully
- c. release ensuring retaining shield slots into guide clips
3. Load half of cards into each feeder tray.
4.Depress bar labeled “push down to operate” until no cards remain in feeder trays.
5.Lower and remove retaining shield.
6.Enjoy your freshly shuffled cards.
User Commentary
Overall, we believe that the product worked well for its reasonable price and relatively compact design. Through thorough testing of our 6-deck model, we were able to recognize key pros and cons that have been outlined below.
The product saved time shuffling the cards especially when using multiple decks. The product exhibited a small table footprint which definitely was an advantage of its design as it allowed ample room on the playing table for the users and the game being played. Moreover, the simple design also meant that the product was easy to use. A bar was the only part that needed to be pressed to make the shuffler function and this simplicity also meant that the design looked sleek and non-intrusive on the table.
The product did, however, have room for improvement in many categories. Firstly, when operated, the shuffler was surprisingly loud which distracted players and interfered with conversations between users. When a single deck needed to be shuffled, the product was not very time efficient and was not significantly faster than shuffling by hand. This was primarily down to the retaining shield which needed to be first inserted then removed from the product. We also experienced multiple instances of cards flipping or getting stuck in the collection chamber when being shuffled. This was very time consuming since the whole deck needed to be reshuffled. In one instance, when trying to repair a jam that occurred, one card was damaged in the process which is another area of improvement. Finally, the product required uncommon “C” batteries which was not expected of a device that is meant to be used at home.
List of Parts
Parts list table