RE: [CAD_CAM_EDM_DRO] Help please: Stuttering Stepper Motors in Jog Mode

I turn tapered threads with turbocnc at 700-1000RPM.
See:
http://video.google.com.au/videoplay?docid=-3207102266117280799

I've built an ELS on TCNC by modifying the screens and it runs on $100
hardware..

PK
-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Jon Elson
Sent: Friday, 12 October 2007 9:04 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Help please: Stuttering Stepper Motors in Jog
Mode

Stephen Wille Padnos wrote:

>
> Wasn't this discussion about TurboCNC?
>
> EMC used to have a problem when the scale was very low - like <10 counts
> per user unit. This would generally only occur for metric machines
> (because mm are so much smaller than in :) ). That may be the problem
> you saw (which I believe has since been fixed).

Yes, that was one thing, although I think it still was a problem
even at 80 steps/unit. Bit, there were also GUI problems when
the user or program switched the units being displayed with
G20/G21 and when tool offsets were in use. I think all of that
has been totally cleaned up now.

And, sometimes I forget which group I am reading/replying to. I
really can't believe anybody still uses Turbo CNC, it is so
antiquated, or at least the version I helped somebody set up
recently was. Just totally dark ages, and he can get his
mini-lathe to thread at no higher than 40 RPM or something.

Jon


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