McWire (Death March: Do not build!!!)
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Release status: unknown
| Description | A guide to building and operation of a McWire RepStrap
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| License | |
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Contents
- 1 Intro
- 2 Why or Why Not Choose Mcwire
- 3 Where to Begin
- 4 Suggested Tools
- 5 Parts List
- 6 Costruction Method
- 7 Structure
- 8 Sleds
- 9 Electronics
- 10 Wiring
- 11 Software
- 12 Files and Parts
- 13 Photos and Drawings
- 14 Flicker Example
- 15 Working Notes
- 16 Forum thread?
- 17 Tooling
- 18 Process
- 19 Notes
Intro
This is a guide that will help with the decision making and build process of the McWire RepStrap found here [1].
Why or Why Not Choose Mcwire
Not sure on whether a McWire is right for you? Hopefully this section can help.
Some Pros About McWire RepStrap
There are some definite advantages of going the McWire route.
Ability to convert too milling CNC
It's fairly easy to switch out different tool heads. The screw driven axis offer the torque needed for light milling.
Opportunity for cost savings
The free form design offers an opportunity to use things you may already have to build your machine. MDF instead of laser cut plastic? Rubber bands instead of springs? You get the Idea.
Parts or substitutions are easily obtained
Besides the electronics most of the parts can be bought at a local hardware store.
Build Platform Easily Accessible
The build platform is front and center. Not surrounded by a box.
Some Cons About McWire RepStrap
Slow Speed
The 4-40 screw drive is slow and this leads to builds that are not as fine as other machines.
Not Standardized
No two McWires are built the same. McWire is a concept driven into reality by the individual maker. Your first parts list will not be your final parts list.
Some Build and Design Experience Required
You need to be able to work with tools, measure accurately and cut (fairly) straight.
Where to Begin
Education
Plan
Execute
Suggested Tools
Parts List
Online
An example McMaster Carr Parts List
---begin paste---
1 95462A033 1 91083A033 1 90275A714 1 90494A030 1 91083A030 1 90273A581 3 91034A100 1 98273A255 2 8735K111 1 88805K57 1 9001K34 3 4549K606 1 4549K595 2 4549K602 3 44605K115 1 68095K121 1 44605K155 2 44605K105 2 98847A029
---end paste----
Complete detail for informational purposes:
1 95462A033 1 Pack Zinc-plated Grade 5 Steel Hex Nut, 1/2"-13 Thread Size, 3/4" Width, 7/16" Height
2 91083A033 1 Pack Plain Steel Type A Sae Flat Washer, 1/2" Screw Size, 1-1/16" Od, .07"-.13" Thick
3 90275A714 1 Pack Zinc-pltd Stl Flat Head Slotted Machine Screw, 1/2"-13 Thread, 1-1/4" Length
4 90494A030 1 Pack Plain Grade 2 Steel Thin Hex Nut, 5/16"-18 Thread Size, 1/2" Width, 3/16" Height
5 91083A030 1 Pack Plain Steel Type A Sae Flat Washer, 5/16" Screw Size, 11/16" Od, .05"-.08" Thick
6 90273A581 1 Pack Zinc-plated Stl Flat Head Phil Machine Screw, 5/16"-18 Thread, 3/4" Length
7 91034A100 3 Each Black-oxide Steel Coupling Nut, 1/4"-20 Thread Size, 5/8" Length, 1/2" Width
8 98273A255 1 Pack 410 Ss Type 23 Thread-cutting Screw, 10-24 Thread, 1/2" Length
10 8735K111 2 Ft. Bar Made Of Teflon(r) Ptfe, Rectangular Bar, 1/8" Thick, 1/2" Wide, 2' Length
11 88805K57 1 Each Architectural Aluminum (alloy 6063), 90 Deg Angle, 1/8" Thk, 1-1/2" X 1-1/2" Legs, 8' L
13 9001K34 1 Each Architectural Aluminum (alloy 6063), U-channel, 1/8" Thk, 3/4" Base X 3/4" Legs, 8' L
16 4549K606 3 Each Std-wall Galv Welded Steel Thrd Pipe Nipple, 3/4" Pipe, 12"l,thrded Ends,17/32"l Thread, Sch 40
17 4549K595 1 Each Std-wall Galv Welded Steel Thrd Pipe Nipple, 3/4" Sz, 3"l, Thrded Ends,17/32"l Thread, Sch 40
18 4549K602 2 Each Std-wall Galv Welded Steel Thrd Pipe Nipple, 3/4" Pipe, 6"l, Thrded Ends,17/32"l Thread, Sch 40
19 44605K115 3 Each Low-pressure Blk Malleable Iron Thrd Fitting, 3/4" Pipe Size, 90 Degree Elbow, 150 Psi
20 68095K121 1 Each Low-pressure Forged Steel Flange, Threaded, 3/4" Pipe Size X 3-7/8" Od, 150 Psi
21 44605K155 1 Each Low-pressure Blk Malleable Iron Thrd Fitting, 3/4" Pipe Size, Tee, 150 Psi
22 44605K105 2 Each Cast Iron,125 Psi,3/4"pipe,round Head Cap
23 98847A029 2 Each 18-8 Stainless Steel Threaded Rod, 1/4"-20 Thread, 3' Length
Electronics
1 Mother Board
3 Motor Drivers
1 Extruder Board
1 ATX Power Supply
1 USB Cable
Local Hardware Store
Costruction Method
Build and measure as you go. Substitutions where ever.
Structure
Sleds
Electronics
Wiring
Software
Wiki build notes below here!
Mr. Bunny may have a cottage industry making and selling kits. He's also the developer. If you want to buy a kit, he's the best person to buy one from. And he's got a link to his paypal account on his homepage. (Listed in the user box above.)
Files and Parts
Generic/Daughter_part and CarrotStraightener. (As a gentle style recommendation, it's good to try to keep all your parts and files on the RepRap wiki rather than scattered around so that Mr. Bunny doesn't have to use a scripts and so on to get stuff back onto the wiki.) File:Uploaded files example.zip
Photos and Drawings
Captioned
Links can be put in captions.
Flicker Example
<flickr>2967868906|right</flickr>
Working Notes
Project Lead(s): Mr. Bunny Wiki-maintainers and helpers:
Forum thread?
Tooling
Description of tooling requirements.
Process
What is making the part like?
