On Friday 01 February 2019 20:23:07 Peter C. Wallace wrote:
> On Fri, 1 Feb 2019, Gene Heskett wrote:
> > Date: Fri, 1 Feb 2019 20:13:54 -0500
> > From: Gene Heskett <ghesk...@shentel.net>
> > Reply-To: "Enhanced Machine Controller (EMC)"
> > <emc-users@lists.sourceforge.net>
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] For PCW
> >
> > On Friday 01 February 2019 15:10:44 Peter C. Wallace wrote:
> >> On Fri, 1 Feb 2019, Gene Heskett wrote:
> >>> Date: Fri, 1 Feb 2019 06:37:25 -0500
> >>> From: Gene Heskett <ghesk...@shentel.net>
> >>> Reply-To: "Enhanced Machine Controller (EMC)"
> >>> <emc-users@lists.sourceforge.net>
> >>> To: emc-users@lists.sourceforge.net
> >>> Subject: Re: [Emc-users] For PCW
> >>>
> >>> On Wednesday 30 January 2019 17:18:09 Gene Heskett wrote:
> >>>> On Wednesday 30 January 2019 15:58:30 Peter C. Wallace wrote:
> >>>>>> Now I've got one for you Peter. I have written that file with
> >>>>>> the extra pwmgen on pins 5-6 of p2, twice, and --verified it.
> >>>>>> But the only place I can see that 2nd pwmgen is in a mesaflash
> >>>>>> --device 5i25 --readhmid output. It is NOT showing anyplace
> >>>>>> else. ?????????? Anyplace else, and P2 is all gpio. Jumper on
> >>>>>> 5i25 set wrong? I gave it a good 30 seconds dead time before I
> >>>>>> hit the power button to reboot, which should have been long
> >>>>>> enough to reset it. So whats next?
> >>>>>>
> >>>>>> Thanks Peter
> >>>>>
> >>>>> You probably have the PWMgen disabled in your hal file (in the
> >>>>> hm2 driver load line)
> >>>>
> >>>> Thanks, that was it.
> >>>
> >>> but the 7i76 acts like its not getting
> >>> Now, in setting it up in my .hal's, I can get pwmgen.1. out of p2
> >>> in order to drive Jon's pwm-servoamp, and I have setup both
> >>> pwmgens in parallel, and I seem to be controlling spindir and
> >>> spinena, but I am not seeing the analog out on
> >>> hm2_5i25.0.7i76.0.0.spinout. Do I need to apply a ground on tb4-1,
> >>> and some of the local 12volts to tb4-3 just to demo that its
> >>> working? It makes sense but I'd druther be safe by asking.
> >>
> >> Yes, the 7I76(D)s analog spindle control is an isolated
> >> potentiometer replacement device so needs an external 10 or 12V
> >> power source (15V ABS MAX) normally this comes from a VFD
> >
> > ok, but then how do I enable a path from the 12 volts being fed to
> > ena+ to ena-. ditto 5 volts to dir+, which should from what I'm
> > reading, send 5 volts to the dir- terminal. The two supplies are
> > separate, sharing a negative common with +12 volts on ena+ but
> > nothing, well 60mv maybe on either dir- or ena-. The
> > pwmgen.0.0.value is 3.1 and growing very slowly, identical to
> > pwmgen.0.1.value, and I can see the pwm with the lalscope at either
> > output. But I've no clue how to verify its getting to the spindle
> > i/o other than looking at the right gpio pins on the 5i25. so
> > obviously I do not know what I'm doing
>
> The 7I76 dir and enable outputs are Darlington opto-coupler transistor
> outputs (+ = C and - = E) They may have as much as 1.5V drop when on
> but thats it. They are rated 50 mA max so be careful you do not turn
> them on into a shorted load (they will be stuck on if wired backwards)
>
But they are not coming on, regardless of the logic state of spinena or
spindir at the hal inputs.
They've never had a load, I'm just measureing with a DVM at the -
terminals. There is +5.12 on dir+, and +12.2 on ena+ but no change is
see on either matching - terminal, which should be feeding the pico
pwmservo amp to enable it, or reverse it.
>
In the hal file, the two pwmgens are driving identical pwm's on THE 5I25
gpio'S 9 and 26, while identical dirs are on THE 5I25 gpio'S 8 & 25 and
I can see the pwm's and dirs change with a halscope while clicking on
the axis spindle stuff.
>From the g0704's hal file, the spinena chain looks like this:
net spindle-enable <= spindle.0.on => boot.spindle.enable
net spindle-enable => and_pid_s_en.in0
net spindle-enable => hm2_5i25.0.pwmgen.00.enable
net spindle-enable => hm2_5i25.0.pwmgen.01.enable
net spindle-enable => hm2)5i25.0.pwmgen.00.enable
net spindle-enable => hm2_5i24.0.7i76.0.0.spinena
The spindir chain looks like this:
net spindle-ccw <= spindle.0.reverse
net spindle-ccw => sample_dirchg.hold
net spindle-ccw =>hm2_5i25.0.7i76.0.0.spindir
both chains can be seen to be doing correctly on a halmeter as spindle
commands are executed by whatever means including spinena and spindir,
but the ENA and DIR outputs remain off as seen at ENA- and at DIR- ON
TB4 7 AND 5.
What am I missing?
Thanks Peter.
> Peter Wallace
> Mesa Electronics
>
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Cheers, Gene Heskett
--
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