>
> One thing I might warn you about is that in practice using a fast thread with
> the Mesa
> boards doesn't usually work well. In fact later versions of pncconf do not
> allow you to
> add a base (fast) thread for this reason. When I was testing steppers using
> Mesa
> and a config with a base thread the steppers were unusable, after removing
> the base
> thread (which actually did nothing) the steppers magically worked well. Other
> users
> have reported that if you play with the values you can come up with a values
> for
> the base thread and servo thread that will work but I wouldn't recommend this.
> It has to do with the base thread interrupting the servo thread .
> I wonder if you could use pwm gen to produce the charge pump signal?
>
> Chris M
Actually AFAICT theres no problem with a fast thread and servos (klemens
situation), the problem only shows up in some systems with step generators and
only if a base thread is invoked but not used, which is why the developer
did not see it (why have a base thread if it is not used)
If you have any evidence that the base thread causes a problem if it actually
runs something I would like to hear about it...
Peter Wallace
Mesa Electronics
I never heard about the part that it only happens if the base period was
invoked but not used.
I will try to do some testing soon to confirm and if thats true will allow base
periods
in pncconf again.
so then Klemens problem was that he tried to add a faster thread after a slower
thread.
Chris M
Ps. after rereading my post - the tone may have seemed like I was being
critical of
Mesa cards - I did not mean that at all. I use Mesa products and am very happy
with them.
I meant to report pitfalls reported to and witnessed by me and the work around
known to
me. Thanks for the info Peter.
------------------------------------------------------------------------------
Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
Finally, a world-class log management solution at an even better price-free!
Download using promo code Free_Logger_4_Dev2Dev. Offer expires
February 28th, so secure your free ArcSight Logger TODAY!
http://p.sf.net/sfu/arcsight-sfd2d
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
