Replies to This Discussion

Permalink Reply by R. D. Starwalt on November 20, 2012 at 6:49pm

That design is very cost effective, flexible and intended to be built with usually affordable tools. A drill press and chop saw are the two 'high end' tools that would aid in fabrication. I am using stuff from my well stocked junk box before buying anything. I ran the numbers for the raw metal and came up with about $140 before shipping. Others have posted similar numbers so that looks about in the right range.

The author is also a builder/maker and is very responsive to direct email and interaction on CNC Zone. What really hooked me is the author's work on a 3D printhead assembly to fit on the machine. For those interested in it, a double duty winner.

Getting your machine to a prototype stage is going to take some time. What would make your drawn lines easier is a member with a CNC plasma cutter. At least the plate work would be quick. The real price killer would be a spindle head that could cut heavy aluminum stock. The spindle head would have to handle some of the stock tooling -  R8, CAT40, Tormach, the list is large. (That debate would be more lengthy than servos vs steppers).

I am still happy to help anyone on this project but until we get some traction, I am building a Momus V2.

-=Doug

 

Permalink Reply by Stefan on September 1, 2012 at 8:55am

I've built quite a few plywood and MDF machines using 22X8X7 ball bearings and find a configuration with 1/8 steel rods most suitable. One side of the track is fixed and the other adjustable.

I use this set up for CNC mills capable of cutting aluminum, 4 axis foam cutting or 3D print with a stepper plastic extruder.

Driver board is the low cost 4 axis driver board offered on ebay or alibaba. Motors Nema23 triple stack. 24 VDC 300 Watt power supply, software Mach 3.

http://www.youtube.com/watch?v=kUgxYLvuobA&feature=relmfu

http://www.youtube.com/watch?v=2gUtfus_lPk&feature=relmfu

http://www.youtube.com/watch?v=blycAsro-uU&feature=youtu.be

Attachments:

• lineartrack1.jpg, 20 KB
• lineartrack2.jpg, 30 KB
• lineartrack4.jpg, 72 KB

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