[Emc-users] PCW, spindle enable for pico pwm-servo, needs 12 volts.

[Gene H. <ghe...@sh...>]

On my G0704, which has the OEM motor I'm abusing, I've been studying up 
on how to get a 12 volt enable signal, which currently is a sparkfun 
contraption driven by a std bob signal.

But with the 7i76d, can I feed 12 volts into the pin a vfd's 12 volts 
would normally drive, ground the Spindle- terminal, and get the 12 volts 
for spindle enable from the Spindle Enable+?  Page 18 seems to indicate 
I could source a few ma that way. I'll be using a different pin for the 
pwm signal that amplifier needs, probably the pwm will show u on step or 
dir 4, on tb3?

Obviously this is a bridge not crossed yet. And in investigating where 
the pwm might show up, there isn't such a critter in the 5i25 as 
programmed for the 7i76d! Looks like I will have to load a software 
pwmgen and feed it out of a gpio on the 5i25's p2?  Why is this not an 
error?:

loadrt hm2_pci config="num_encoders=1 num_pwmgens=1 num_stepgens=4"

I'll sort it, but tis a surprise that no pwmgen shows in the halmeter 
menu.  Or is it there, and completely gobbled up by the builtin spinx1 
in the 7i76d? Ack the 2 pass output yes its there. Must figure out how 
to access its raw output... For the pico amp the analog out on tb4-2 
that would feed a vfd's analog input is not usable. Looks like I'll need 
a software pwmgen feeding a gpio on p2, And feed both pwmgens?  Hummm.

Advice needed Peter. I don't think I'm seeing the whole picture.

Thanks.

Cheers, Gene Heskett
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