Re: [CAD_CAM_EDM_DRO] Re: Setting Gecko current

Rab:

BTW : the zero not zeroing means you hit the speed out of sync problem.
When the interpollators get out of sync, strange things begin to happen. I
have to think up some way to keep them in sync.
I just tested X1A400 and got the 26.00mm/sec on the A with a toolpath
velocity of .157. (You can switch between axis velocities and toolpath
velocity with a right click on the green part of the velcoity DRO.)

This would (or should) be correct as to my settings. I think if I can get
the sync thing cured, the angular velocities will match the desired
feedrates as close a possible with time cueing or something as you've
suggested.

At any rate, as soon as I add an OCX command for segment move and feedrate
setting, I'll send you a new OCX. You'll have full movement from that point
forward for scripting and such anyway.

Good luck, thanks for the test,
Art
ArtSoft CNC Software Company
http://users.andara.com/~fenerty/master.htm

----- Original Message -----
From: "stephen_stallings" <stevesng@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, June 09, 2002 9:21 AM
Subject: [CAD_CAM_EDM_DRO] Re: Setting Gecko current


> Hi John,
>
> Setting current by motor temperature is not
> going to be accurate enough to get the most
> out of you motors without damage. There are
> magnetic saturation effects that may limit
> useful current before overheating sets in.
>
> Stepper motors do get hot in normal use. They
> will get just as hot sitting still as they
> will running except in the case where the
> drive has idle current reduction enabled.
> Typically a stepper motor can be run hot
> enough that you can touch it quickly without
> pain, but is too hot to keep your hand on
> for very long. This is not a precise temperature
> measurement, but then this is not a precise
> way to set current. :-)
>
> Cheers,
> Steve Stallings
> www.pmdx.com
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "cncnovice" <crcitser@g...> wrote:
> > Hello list,
> > This is my second attempt to post this question. I apologize if it
> > somehow gets duplicated by Yahoo.
> >
> > Can the current sense resistor on a Gecko drive be set for an
> > unidentified stepper motor by the operating temperature of the
> motor?
> >
> > In heavy use, do stepper motors get too hot to touch?
> >
> > I am just finishing my CNC router using surplus parts, and I do not
> > want to underdrive an axis.
> >
> > Many thanks in advance for your advice. This is a great list for
> > learning.
> >
> > Best to all,
> > John Champlain
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> 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 as 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.
>
>
>
> 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@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>