Torch Table Build
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Proposal
See proposal at http://openfarmtech.org/Lawrence_Proposal.pdf .
You can also see the working agreement,Lawrence Kincheloe Contract
The purpose of this project is to enrich both the participant and the Factor e Farm project. The scope of this specific project is to build the seeds for a MegaRap, which is a modification of the origional Torch Table designed to expand the range of build materials and capabilities. This is in the spirit of the RepRap project, but at a larger scale and lower precision. The initial goal is to design and build a torch table that can be added on to in the future but is still functional in its own right.
Bill of Materials
Bill of Materials 5172T12$2.50 per Pack
| Item | Number | Cost | Further Info | Purpose | Aquired? |
|---|---|---|---|---|---|
| Computer | 1 | $300 or less | http://www.linuxcnc.org/ | To run Linux cnc | yes, IBM Laptop |
| Xylotex 4 Axis Drive Box with 425 oz.in. Motors and Cables | 1 | $460.00 | Xylotex Stepper and controller | To provide motion control and movement precision | Yes |
| V-Groove Bearings 3/8 inch | 12+(spares) | $9.95 each, $119.4 + (S&H + spares) | VXB V-Groove bearings | To provide low friction linear motion | no |
| Hot rolled steel 2"x1/8" plate | 4 feet | 4ft 1 $10.00 $10.00 | Metalsdepot | To provide material for motor mounts | no |
| Hot rolled steel 1"x1" square tubes 16 gauge | 35 feet | Metalsdepot | To provide structural support | no | |
| 200011 (1/2” sq. x 72” 20 DP 20 Deg) | 4-5 | $24.80 each, $99.2 to $124 | Standard Steel Specialty | rack for gear to ride on | yes |
| Track for linear motion | 3 x 1/8 inch cold rolled Plate | 35 feet | Metalsdepot | To provide material to make rails | no |
| Bolts 3/8 inch, 1 1/2inch long | 12+(spares) | $7.46 per Pack of 50 McMaster | McMaster | For attaching V-Groove Bearings | no |
| 3/8 inch threaded rod 6 inches long | 8 + (spares) | McMaster | for connecting the top and bottom carage | no | |
| 3/8 inch nuts lots | Part Number: 90473A031 | For locking threaded rod in place | no | ||
| 3/8 inch washers | lots | Part Number: 90126A031 | For locking nuts and for spacers | no | |
| 1/4 inch washers lots | McMaster | for holding against stepper motors | no | ||
| 1/4 inch nuts | lots | McMaster | for spacers and such | no | |
| Bolts 1/4 inch dia. , 1 3/4 inch long | less than 100 | McMaster | gear rack | no | |
| 3/8" Bore | 4 | $15.37 Each Total $46.11 | McMaster 5172T12, 1327K113, Part Number: 5912K12, 6412K11 | Attaches to stepper motors and interfaces with gear rack | no |
| thrust bearing 3/16" | 16 | $1.96 Each, $31.36 Total / $1.05 Each, $16.80 Total | McMaster | no | |
| Thrust Bearing | McMaster Nylon Part Number: 2797T1 | allows the motor to swing freely | no | ||
| sleeve bearing | 4 | $1.34 each, $5.36 total | McMaster Part Number: 6391K143 | to connect between the stepper motor and the gear, will also add a bit of adjustable length | no |
| support flange sleeve bearing | 4 | $0.59 Each, $2.36 Total | McMaster Part Number: 2938T14 | supports gear | no |
| 10 gauge bolts | lots | $7.78 per Pack of 50 | McMaster Part Number: 92610A245 | stepper | no |
| 10 gauge nuts | lots | $1.54 per Pack of 100 | McMaster Part Number: 90480A011 | stepper | no |
| Washers | 100 | $2.50 per Pack | McMaster Part Number: 95601A330 | Holding bearings | no |
| Grease | 1 | cheap | McMaster | For greasing rails | no |
| z axis tension spring | 1 | $7.93 per Pack of 1 | McMaster Part Number: 9640K244 | returns z axis head to safe position | no |
| stepper saftey spring | 4 | $10.00 per Pack of 6 | McMaster Part Number: 3114T79 | no | |
| cutting lubricant | Kerosene | 1/2 gallon | $10 | Wikipedia Cutting Fluid Tapping holes and such, might not be needed | no |
| Skateboard Bearing:Sealed:ABEC-7 | 8 | $9.95 | VXB | no | |
| Total 1 Approx. $1582 | Torch Table Wiki | one torch table, sans stepper motors, tools, and torch |
Working Concepts
X axis
Design Rationale
- Rack for x motion - cheapest, most robust solution for precise motion
- Spring-loaded x and y motors
Y axis
Design Rationale
Z axis
Design Rationale
Blender Concept
File:Factor e Torch Alpha 3.blend
Torch vs. Plasma Cutter
- Comes down to initial cost versus long-term cost
- Plasma cutters - consumables cost $20 for 5 new electrodes and nozzle heads
- Electrodes are rated for 45 minutes to 60 minutes for 1/2" steel
- More expensive versions state they last 4 times longer - are heavier and have better temperature control
- For anything above 1 inch, torch is better
Team
- Deep in the continental US underground...
