RE: Steppers and the .INI file

[John Ross <johnr-at-i-link.net>]

Are you referring to the FF0-FF2 values?  If so there are all 0.00.  It
looks Iike  have found the problem.  I was reading through the INI file and
realized the z axis had a P= 150 but the x and y had a P=1000. I've lowered
the P value and it was pretty good. Lowering them all to 100 its even
better.  I haven't notice much change in feed rates though.  It's just a lot
smother.  Does this sound right? It seemed I bumped it way up to get rid of
following errors when I was running EMC without any motors.  I still had the
x axis wigout and lose a few steps during a G1. I wanted to try bumping it
lower but it was way too cold last night to continue on. Is it normal or
advisable to have different P values on each axis?  I was just going top
bump the x a little till I can cut my entire test file with out any errors. 


John Ross
(Lindon UT)    

		
		-----Original Message-----
		From:	Tim Goldstein [tgoldste-at-mlh-services.com]
		Sent:	Wednesday, November 01, 2000 11:54 PM
		To:	Multiple recipients of list
		Subject:	RE: Steppers and the .INI file


		What is your F value when you do the G1? You may be hitting
a resonance bank
		for your setup??

		Tim
		[Denver, CO]

		> I'm using freqmod and I have the Period set to 0.000016 I
have the
		> acceleration settings all at 2.0.  I ran a quick test with
a dial
		> indicator.
		> If I zero the indicator and do a GO Y3 to move away from
it then
		> a G0 Y0 to
		> move back the dial indicator is within .001 (I don't
expect too much
		> accuracy from the flimsy mag base). If I do a G1 Y3 and G1
Y0 the Dial
		> indicator is off by approximately .020.  The results have
me puzzled.  Any
		> ideas?  Will changing the PERIOD value fix this?
		>
		> Thanks
		> John Ross