Re: Low cost 6A stepper drivers on eBay

I had assumed that the microsteps/half steps were for increased
resolution. I stand corrected.

The gecko microsteppers are about 5 times the price of these basic
drivers. While I accept that "you get what you pay for" surely these
are not complete junk? I thought the resonance issues only happened
at certain speeds (or load/speed combinations?). If this is the
case, would it be a practical approach to go with these and work
around the resonance issues by adjusting feed/speed until I can
afford the upgrade to the microsteppers?

Al

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Statman Designs, LLC"
<titanium@c...> wrote:

> microstepping has NOTHING to do with accuracy. It is a way of

eliminating

> low speed stepper resonance issues, and for me there is NO

SUBSTITUTE for a

> microstepping drive.
>
> Daniel J. Statman, Statman Designs
> www.statmandesigns.com
> dan.statman@r...
>
> ----- Original Message -----
> From: "arielnh56" <3in1@r...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, December 01, 2004 1:06 PM
> Subject: [CAD_CAM_EDM_DRO] Low cost 6A stepper drivers on eBay
>
>
> >
> >
> > There are two vendors selling basic 6A stepper drivers on eBay.
> >
> > One has a website http://www.electronicutopia.com and is selling
> > them for under $25. Seems to be a basic full step driver with no
> > isolation or heatsink.
> >
> > The other is user "esreng". His boards are about $47 but do half

step

> > and have a heatsink.
> >
> > I am looking for drivers to drive ~200oz/in steppers for my

Shoptask

> > 3-in-1. The Shoptask has a 2:1 ratio on the stepper drive and a

10

> > tpi lead screw so one full step would be 0.00025", which is more

than

> > the accuracy of my Acme lead screws, I think, so I don't think I

need

> > half step or microstep drivers.
> >
> > If anyone has any experience with these drivers or vendors or any
> > other advice on these it would be most welcome. I am on a small
> > budget so these are very tempting.
> >
> > thanks
> >
> > Alastair
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
> > Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> > List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com,

wanliker@a...,

> timg@k...
> > Moderator: pentam@c... indigo_red@q... davemucha@j...
> [Moderators]
> > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> > OFF Topic POSTS: General Machining
> > If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to

reach it if

> you have trouble.
> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this

to be a

> sister site to the CCED group, as many of the same members are

there, for OT

> subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY

POSTING THEM.

> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > bill
> > List Mom
> > List Owner
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >