Re: [CAD_CAM_EDM_DRO] Small Problem

Hi Weyland,

The RF mills (I have an RF-31) are gonna take bigger motors! About 450
oz/in, from what I remember people saying. Others can probably advise
on the motors for the plasma cutter. How big is it?

Rigotti's driver board has UCN5804B's (UNIPOLAR), and is suitable for
the 60 oz/in motors. So I'm not sure where you were going to use it.
Your two applications call for some bigger motors! An you really them
to be BIPOLAR, with chopper drivers. Otherwise You'd need terrible big
L/R resistors, and you'd have a LOT of heat to get rid of!

> ... driving unipolar motors with bipolar drivers...

Depends on which Unipolar motors you are talking about! A lot are 6 or
8 wire, and with these, you just use 1/2 of each winding phase. You DO
NOT want anything "common" between the two windings. It will let the
magic smoke out of the drivers!

Good luck man!

Alan KM6VV


Weyland wrote:

>
> Hey Alan~!
>
> From: "Alan Marconett KM6VV" <KM6VV@...>
>
> > If the motors go on Rigotti's router, then the smaller motors are
> > probably ok. Just keep after him, and get an order in. I have seen the
> > plans, schematics, hardware diagrams etc., but haven't had my hands on
> > it yet.
>
> No, the motors are going on two different projects.
> I'm making a motion table for my plasma cutter in one,
> and decided to convert my old Rong Fu mill in the other.
>
> > At that price, you can play with it, and hardly loose! I bought a MaxNC
> > "motion kit" over 2 1/2 years ago, and I've FINALLY got the motors and
> > Gecko's I want!
>
> Yeah, I gotta admit $49 for the kit *is* attractive...
>
> > Hang in there!
>
> I'm tryin' man~!
> Thanks~!
>
> Weyland