"I think this would be a great place to put a quote which summarizes the design philosophy" - Johnny Cooper
The Cyberdyne T-1 is a prototype Repstrap which has cost and simplicity as it's main driving design objectives. development page This page showcases the T-1's workings and document's it's design so that it can be reproduced by others.
Working Notes. This is a stub!
Everything below this point is working notes.
This is a T-1 RepStrap! I (JohnnyCooper) made it because I want to assist in the proliferation of Low Cost 3d Printers Low Cost. Share and Enjoy! (This page was made using the wiki page Example as a model.)
Gada Prize Timeline
Team Cyberdyne's Gada Prize contest entry will be the ultimate result of the following lifecycle:
-Stage 1 -> Cyberdyne T-1
Working Low Cost RepStrap for Proliferation and community growth purposes. This will equip a larger pool of people to work on the RepRap Project, enabling more competitors to take part in the Gada Prize competition.
-Stage 2 -> Cyberdyne Hydraulic Control System
-Stage 3 -> Cyberdyne T-800
This model is a low cost light weight robotic manipulator/arm. This model is dependant on the Cyberdyne Hydraulic Control System and has the benefit of minimal vitamin count, and large work envelope, as well as enabling complex parts to be fabricated fascilitated by the high number of [|Degrees of Freedom] possible.
-Stage 4 -> Cyberdyne T-600
This model is a slower version of the T-800 nearly eliminating the dependancy on vitamins entirely. It is driven by worm gears, and worm wheels. It is almost entirely self replicating, pending advancements in printed motors, PCBs, semiconductors, bearings, ect.
Depending on the Gada Prize rules: either the T-800 or the T-600 will be the design which will be entered as the contestant.
The best syringe I have been able to find is the "Becton Dickison & Co. 1ml 25G 5/8 Tuberculin SlipTip" Reorder No. 309626 available through Bi-Mart Pharmacy
Digital Calipers are generally pretty generic in terms of quality and features as far as I'm concerned however selecting one with an RS232 interface port is important as this allows for closed loop feedback to the Microcontroller. I use the Cen-Tech 6" & 12" Calipers as they are both cheap as dirt, and are more than adequate. It's best to buy them when they are on sale because they got for ~40% off semi-frequently.
-Physics & Chemistry Lab Jack/Tabletop Scissor Jack
Design of the Z axis isn't very interesting to me so this solution is a stop gap as much as anything, however an example of such a device is as follows:
This can either serve as a solution, or as an inspiration for a rapidprototype printable scissorjack/laser cut acrylic version of the same.
This design may be replaced with a homemade hydraulic bottle jack/table combination in the future.
Files and Parts
Generic/Daughter_part and CarrotStraightener. (I use a Student Edition of Solidworks for my Solid-Modeling and I'm uncomfortable with publishing the files. I will recreate them from blueprints in open source software once I have a working prototype.) Media:uploaded_files_example.zip
Photos and Drawings
Project Lead(s): http://teamcyberdyne.blogspot.com/
JohnnyCooper can be contacted via gmail under the username "JohnnyFCooper" Wiki-maintainers and helpers:
3d Printer or Drill Press & X-Y Table(http://www.micromark.com/MICROLUX-X-Y-TABLE-ATTACHMENT,8009.html)
Edit: The following is the parts list for a mcwire... I'm imposing self discipline to keep my tools limited to these: "
* A Drill Press (A hand-drill can be used, but it is more difficult) * Drill Bits: 10-24 (#25), 3/16", 5/16" * A hacksaw (or other saw capable of cutting aluminum) * A Screw Driver * A Tape Measure * A paper printer (for printing out templates) * Double-sided Tape and paper/Adhesive sheets.
* A pipe wrench (for tightening base) * A 10-24 screw tap (self-tapping screws are included in the design for this purpose, but it is quite difficult to tap the holes with those.) "
The digital calipers are intended as a replacement for lack of an X-Y table. If you already have an X-Y Table, I recommend a low budget CNC Repstrap conversion.
Fabrication of the T-1 involves the production only several parts:
-Caliper Clamp 1 -> This part clamps a 6" caliper's fixed jaw to a 12" caliper's sliding jaw
-Caliper Clamp 2 -> This part clamps the extrusion head to the 6" caliper's sliding jaw
-Caliper Clamp 3a -> This part transforms the 12" caliper's in to a Gantry by suspending the caliper on edge on supports on either side of the Z axis Scissor Jack.
-Caliper Clamp 3b -> This part accomplished the same as Caliper Clamp 3a, however it includes a stepper motor mount. Fixed jaw side?
-Generic Extruder Head -> Ideally a bowden wire design, however solder paste is acceptable as well. A traditional pinch roller may be possible but I consider the weight and momentum of the pinch roll stepper to be undesirable for this design.
In the first revision: Caliper Clamp 1 & 2 contain threaded nuts(6-32?) so that a lead screw can drive them. This eliminates the need for the hydraulic control system.
Once a working 3d printer has been made, work can begin on the Cyberdyne Hydraulic Control System. This system is modeled after paste extruder toolheads using a linear actuator to drive a syringe via another syringe at a 1 to 1 ratio. The purpose of this is to separate the heavy power source and the drive mechanism so that a light weight drive mechanism can be used on the moving elements of the Cyberdyne T-800.
Now that the design rationale has been explained, it is a downhill battle from here. I intend to have a working prototype of both the T-1 and the Hydraulic Control System by May of 2010.
DC Servo Drive: http://www.ladyada.net/make/mshield/ http://reprapdoc.voodoo.co.nz/bin/view/Main/DCDigitalServomotor http://store.makerbot.com/electronics/electronics-kits/dc-motor-driver-v1-1-kit.html http://www.reprap.org/bin/view/Main/DC_Motor_Driver_1_1