Re: How does this stepper speed sound???

["Fred Zinsli" <fred-at-shooter.co.nz>]

Hi Patrick

Please contact me directly via an alternative email address. Email to the 
address you are using is bounced.

Regards

Fred

-----Original Message-----
From: PKF <pferrick-at-tows.moric.org>
To: Multiple recipients of list <emc-at-nist.gov>
Date: Mon, 25 Feb 2002 13:35:23 -0500 (EST)
Subject: How does this stepper speed sound???

> 
> Hello all,
> 
> OK, now that I have emc running my homemade mini-mill with steppermod,
> I'm wondering how much (more) effort I should put into trying to get
> freqmod going.  As a number of others seem to have done, I've tried many
> combinations of PID values to no avail.  (following errors abound)
> Here's the setup and the results I'm getting now:
> 
> BDI 2.0
> Pentium III 333MHz/128 Mb RAM
> 23 Frame, 80-100 (or so) oz-in. motors  (a guess, they're not
> labelled!!)
> 1.0 Amp drive current to motors
> 
> I'm currently able to move the table (in X,Y or Z) at a maximum of 40
> inches/min.
> Any faster and things get squirrelly quick.
> 
> As a complete CNC novice I have no idea if this speed is typical or if I
> should expect better!   Somewhere in the deep recesses of my brain I
> seem to recall seeing a small cnc machine moving a whole lot faster than
> this.   By the way, I am running a driver made by the Superior Electric
> Co. which can deliver a maximum of  2A to the motors. (It's set at 1A
> max now, my guess as to the capacity of the motors.  They get pretty
> warm after a bit of use...)
> 
> So, what do you think?  Will freqmod give me more speed?  Smoother
> motion?  Or should I just go with what I have so far?   If anyone has a
> similar setup and has freqmod running their steppers, could you please
> clue me in to your PID settings?
> (Please don't all email at one time!!!!!)
> 
> thanks,
> Patrick
> 
> 
> --
> ..
> 



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