4 Axis mod ?

discussion of design changes / improvements / suggestions
PsyKo
Posts: 430
Joined: Thu Aug 30, 2012 8:42 pm
Location: France

Re: 4 Axis mod ?

Post by PsyKo » Mon Feb 11, 2013 9:51 am

Hello,
damagi wrote:Any Updates on this?
I'm currently gathering the required parts. I already have the shaft mounting plates (http://www.damencnc.com/en/components/m ... arings/165)
I'm still waiting for the actual shaft, and have to decide of the driving method (either belt, gears or worm screw). The chuck will probably be a 3 jaw lathe chuck.
Before jumping in the metal cutting, I'll probably do a wooden prototype, with cheap parts :
- home made chuck,
- simple cheap shaft (non rectified for now),
- home made milled gears,

It will be a standalone 4th axis, simply because now I don't have the required electronic to use it as a CN axis. Maybe I'll upgrade to tinyG sometimes, but I'd also like to be able to manually rotate it (using a keyboard or something).
Does anyone have a good link for a simple and cheap stepper motor driver ( Nema 17, the same as used on the Shapeoko) ?

But most of all, I lack time for doing it :)
Shapeoko #736
Kress 800, Z Axis upgrade, dual Y, 600mm X&Y rails, metal spacers and V Wheels, home switches, 4th axis
Goko - Free CNC Control Software - http://www.shapeoko.com/forum/viewtopic ... 380#p44380

alpha
Posts: 174
Joined: Thu Apr 12, 2012 2:49 pm

Re: 4 Axis mod ?

Post by alpha » Mon Feb 11, 2013 10:04 pm

PsyKo wrote: Does anyone have a good link for a simple and cheap stepper motor driver ( Nema 17, the same as used on the Shapeoko) ?
I got me some of these on Black Friday, I just connected it to a breadboard yesterday and used an Arduino to and some pules to drive it... there is a little cheaper low current version - but I wanted something i can run without heat sinks...

The DRV8825 stepper motor driver carrier is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver:
http://www.pololu.com/catalog/product/2133

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