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From: "Michael Holm"
Subject: Re: HELP! CNC/servo/stepper controllers needed
Date: Sat, 7 Sep 2002 01:49:37 +0200
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Organization: TDC Internet
Lame, I know, but I build a small mill from scratch for around 200USD
See images at www.gizwiz.dk
The interface is build after Hans Wedermeyers s drawings at
http://hans-w.com/modular.htm it's compatible with EMC too.
I use 3 steppers that I found with friends and in used-electronics shops.
I use a demoversion of Master5 CNC to run the mill
http://users.andara.com/~fenerty/master.htm That's a windows port of EMC
So sure, its possible.
"Ralph Seguin" wrote in message
> I forgot to post this on alt.machines.cnc et al.
> I'm on a very limited budget, and I am looking for
> inexpensive (??) PC based (PCI/ISA/parallel) 5 or more axis
> controllers (3
> axis + rotary table + ...?) for use with EMC (or other
> softare in Linux, DOS, ...) for:
> -fixing/retrofitting my existing Bridgeport mill (has
> an OLD Retrotek 8800 CNC controller that doesn't work
> well, and often flakes out). The mill already has precision
> ballscrews, and DC permanent magnet servo motors. This is
> one of my top priorities. This current CNC control reads out
> and moves in 0.0001" increments, and I'd like
> something at least as good (but WAY better for the
> computer hopefully :-)
> -Controlling a 3 axis stage that (currently) has
> stepper motors on it.
> -Doing some experiments and making some motion tables
> with servo motors (DC, AC, brushed, brushless, 3
> phase, ...) and stepper motors.
> I know that there are some nice boards out there for
> $800+, but that is beyond my budget. Anybody have any
> suggestions? The 8 axis servo-to-go board looks really nice too :-(
> If I can get a good deal on 3 to 5 PC based motion
> I know that I've got myself into an expensive hobby
> here, but we have to save our money for the bills now
> -What board(s) should I be considering? (especially
> for the Bridgeport retrofit).
> -Am I insane to expect to find something cheaper? (I
> guess I already know the answer :-)
> -What stepper motors (or servos) and controller would
> be good to use for driving a 3 or 4 axis mill or stage
> (say 20"x20"x8" travels)? With Acme screws? With
> ballscrews? Say with 50lbs of table + work.
> -How is this project going? What will the cost be for
> -Any other public servo/stepper/cnc controller
> projects like that?
> -I know very little about electronics, but would like to learn. Is it
> reasonable/feasible to build a servo and/or stepper controller for
> driving high torque servos and/or steppers? I have a feeling that
> this would cost a LOT of time, which is also in short supply :-)
> -Are there any CNC kits out there that include the computer,
> controllers/drivers and motors that are reasonably priced?
> rpseguin AT yahoo DOT com
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