LinuxCNC Support Forum :: Topic: pncconf - feature requests (21/22)

cmorley OFFLINE Moderator Posts: 1486 Thank you received: 40 Karma: 89	hmm my art got screwed up - i think i get it anyways. thanks
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Re:pncconf - feature requests 04 Aug 2012 18:13 #22834

PCW OFFLINE Moderator Posts: 1645 Thank you received: 86 Karma: 116	3.3V / \ / \ / < ANALOG IN \ / GND Ha had to find out how to escape the backslashes...
	Last Edit: 04 Aug 2012 18:19 by PCW. The administrator has disabled public write access.

Re:pncconf - feature requests 04 Aug 2012 18:18 #22835

cmorley OFFLINE Moderator Posts: 1486 Thank you received: 40 Karma: 89	you jedi powers are strong thanks
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Suggestion 27 Nov 2012 13:49 #26992

Psykhon OFFLINE Junior Boarder Posts: 33 Karma: 0	I have been having some issues with 5i25 and G540. It turns out that timing parameters are too tight in pncconf and with a small increase, everything is smoth, here are the minimun values that works: DIRSETUP = 250 DIRHOLD = 250 STEPLEN = 1100 STEPSPACE = 2100 So my suggestion is if this can be taken as defaults in pncconf when a 5i25 and G540 combo is selected Regards
	Last Edit: 27 Nov 2012 14:24 by Psykhon. Reason: typo The administrator has disabled public write access.

Suggestion 27 Nov 2012 14:23 #26994

Psykhon OFFLINE Junior Boarder Posts: 33 Karma: 0	in this post you can see how I made the 5i25 generate the charge pump for G540 with losts of help from PCW, I guess this will also be a good addition for pncconf
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Suggestion 28 Nov 2012 18:11 #27054

PCW
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Chris, if you change the G540 timings, I would suggest:

DIRSETUP = 700
DIRHOLD = 700
STEPLEN = 1500
STEPSPACE = 2500

As these are steplen and stepspace values that will not impact the maximum the G540 step rate of 250 KHz, and theres no reason for the setup and hold times to be so small. With these timings, all signals have 500 ns margin from the G540 minimums.

(250 KHz is somewhat unlikely also since this is 7500 RPM!)

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