Looking for people wanting to develop new plans for a cheap cnc

[shashank ayyar]

if someone could help me out with the plans....

[kreutz]

Originally Posted by shashank ayyar if someone could help me out with the plans....

There are a lot of simple DIY schematics at http://pminmo.com/, Pminmo has also a very good wiki with a lot of information about the electronic part of CNC.

There are a couple of a little more complicated designs for high power unipolar motors (up to 80 Volt 8 Amperes) here on the zone:

http://www.cnczone.com/forums/showthread.php?t=25361 and http://www.cnczone.com/forums/showthread.php?t=38873

and some videos of them in action: http://www.youtube.com/results?searc...&search=Search

For high power bipolar controllers I always suggest Gecko's.

[pminmo]

Maybe this will help: http://www.pminmo.com/wiki/index.php...ystem_Overview

[shashank ayyar]

Originally Posted by kreutz There are a lot of simple DIY schematics at http://pminmo.com/, Pminmo has also a very good wiki with a lot of information about the electronic part of CNC. There are a couple of a little more complicated designs for high power unipolar motors (up to 80 Volt 8 Amperes) here on the zone: http://www.cnczone.com/forums/showthread.php?t=25361 and http://www.cnczone.com/forums/showthread.php?t=38873 and some videos of them in action: http://www.youtube.com/results?searc...&search=Search For high power bipolar controllers I always suggest Gecko's.

you guys are unbelievably helpful.

[Ray Ingersoll]

I've been lookong at converting car alternator's into stepper motors you tube has got a
nice article on it converting a car alternator into a stepper motor there are four articles
from the electronics to the visual basic software I can get alternators for $5.00 bucks
a piece the diode trio and voltage regulators are bad they are removed anyway pretty
cheap stepper motor

[morphious69]

I think the body is more important. simple plates and bolt hole placement can make any stepper or servo motor fit the basic frame. But if we can agree on a specific design then we could get a custom extruded part to fit the bill and everyone buying in on it could would make the individual parts very affordable.

[leggazoid]

http://www.scribd.com/doc/22283121/M...9v1-FREE-PLANS

Free for personal use, can't beat that.

Designer says ~$105 for MDF and ~$220 for hdpe.

Add $13 steppers and $19 power supply

http://www.mpja.com/prodinfo.asp?number=17748+MS
http://www.mpja.com/prodinfo.asp?number=13657+PS

$64 dollar driver board.

http://www.hobbycnc.com/products/hob...ver-board-kit/

Can it get any cheaper or easier?

You could do a cheaper build, but the bang for the buck is pretty good IMHO.

[morphious69]

something I would like to see in the controller design. a way to send motor backlash to an input rather than wasting it as heat build up on a protective diode. that way you could let the software know the motor moved.

[frog]

I have an idea, and looks like the most logical place to post it. I am thinking about starting a Co-Op group online maybe a thread, you see I am a College instructor. As a hobby I have a machine shop for fun. 2 CNC machines, one just purchased. I have noticed that everyone wants to have the chance to build their own machines, here is what I am proposing. That we form a group online and all work together and meet once a week and start with a base machine, we can modify size to suit our own needs, then once we have agreed upon a design I will build a 3D version in Bob Cad, then we can modify it to suit our needs. Ok here is the cool part if you are in the design group that we can form I have a friend that is a Retired Tool and Die maker from IBM and he tinkers in the Machine shop, We can have him make the parts at cost plus a little for lunch. I am thinking 6160 Rolled or Extruded Have him do the machine work based on our plans, here is the catch the parts will have to be standard, that way he can make multiple sets. I would like to try this as a group. However initially in order to get a set of plates at a cost effective price you would have to be in on the design process. This is a great opportunity for a bunch of people to put their heads together and come up with a working product. We can meet online using Grove or Net meeting. Then determine who is responsible for what part of the design. Then come back and post our findings in the thread. I have some wonderful Ideas for designing a Unipolar controller, as if we need another. Next we can make up specs as well as design deadlines. Here is a chance to experience a real life Product Development Cycle. IT WILL BE OPEN SOURCE ONLY. So everyone when it is finished it will be posted so anyone in any machine shop could build it. The First Version 3 AXIS Second Version 4 next version 5 Axis. Ect. This is an ambitious project. Email me kd4ffd@yahoo.com or post back in this thread. I have designed and built a few machines as well as the electronics. I have also written some interface software, for machine control. This is just a hobby so it will have to go at a hobby pace, for the parts. Feedback is appreciated.