Understaning PWM

ok; It turns out the enable signal needs to be inverted.
So, I went to pncconfig tool and said to invert the output...
It generated:

setp hm2_7i96.0.ssr.00.out-00.invert_output true

Which promptly created a startup error... Silly me, I thought something this easy would work...

Umm, no

The SPINX1 enable signal is active low so you wire
OUT0- to GND and OUT0+ to the SPINX1's /ENABLE signal,
so when SSR 0 is on (true in hal) , the SPINX1 /ENABLE
signal is low and the SPINX1 is enabled.

this does not sound right...
First of all, I see no capability in the pncconfig tool for specifying a + & - for an output...
Is this available as a HAL command?

Also, why would the + be connected to the SPINX enable? if it should be LOW to enable?
...I'm just not getting it...

the light just came on...image missing /media/kunena/emoticons/smile.png sso connects the enable to ground...


 

Yes, its just a switch

( A polarized switch so the most positive signal must connect to OUTN+ )

ok... still have the issue of no speed control; it's off or full speed, 24000 rpm...

and I did a dump of the pin-outs and the two pins are :

pin 25:
Primary Tag: 0x03 (IOPort)
Secondary Pin: 0x81 (PWM, Output)
pin 26:
Primary Tag: 0x03 (IOPort)
Secondary Pin: 0x82 (Dir, Output)

I would not expect them to be one after another? since they are supposed to be step+ and dir+

Something does not add up

They are sequential

Is the PWM scale set to 24000?


PWM is active high. If you have the SPINX1 PWM signal connected to TB2 pin3 (STEP4+) , PWM should be 0 when the commanded spindle speed is 0. You should verify this with a voltmeter.  (the voltmeter will read the average so should read
0V on STEP4+  at 0 PWM, about 2.5V at 50% PWM and about 5V at100% PWM.

The SPV voltage relative to SP- should track these voltages (scaled up by the 10V or so between SP+ and SP-)