On Sat, 2 Feb 2019, Gene Heskett wrote:
Date: Sat, 2 Feb 2019 07:37:11 -0500
From: Gene Heskett <ghesk...@shentel.net>
Reply-To: EMC developers <emc-developers@lists.sourceforge.net>
To: emc-developers <emc-developers@lists.sourceforge.net>
Subject: [Emc-developers] 7i76 vs spinout signal
Can someone please explain to me, who is used to using a spinx1 for the
pwmgen output to analog voltage conversion, just how in tuncket the 7i76
works? I just now found out, when I tried to redirect a 5i25 pwmgen
output pin and found from the error msg as it died, that
hm2_5i25.0.7i76.spinout is a float input!
In Other Words, pwmgen.0. in the 5i25 is driveing /dev/null. So I fed
the hm2_5i25.0.pwmgen.0.value to hm2_5i25.0.7i76.spinout and can now
read it there with a halmeter. But I've no clue what sort of a float it
wants to use the full voltage range of tb4's spindle- to tb4's spindle+
at tb4's spindle-out.
The document on the 7i76 seems to be totally mute on this. Can some who
knows please explain?
To say I am bumfuzzled at this revelation is putting it mildly if this
does indeed bring the ENA and DIR outputs on tb4 to life, which are not
responding with spinout at 0.00000000. I'll have to recalibrate scales
and gains at several locations in nearly a 800 LOC hal file.
Thanks all.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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The 7I76 spindle output should not be too different from a PWM setup
There are three pins related to spindle control
7i76.x.x.spindir
7i76.x.x.spinena
7i76.x.x.spinout
and 5 parameters
7i76.x.x.spindir-invert
7i76.x.x.spinena-invert
7i76.x.x.spinout-maxlim
7i76.x.x.spinout-minlim
7i76.x.x.spinout-scalemax
Typically the maxlim and scalemax parameters are set to the maximum spindle
RPM, and the minlim parameter is set to 0. This scales the analog voltage so
full scale RPM is full scale voltage (100% of SPIN+)
The 7I76 output is unipolar so normally its linked to motions spindle speed
speed-out-abs pin
Peter Wallace
Mesa Electronics
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