Spindle PWM Mesa 5i25 not setting speed

I am running Axis 2.8.4 with a Mesa 5i25.  I have it configured to set the spindle speed using pwmgen.  I get a pwm output on the correct pin at the correct  frequency but it is a very narrow pulse (seen with oscilloscope) and does not change with the speed.

In the hal file I have the following:

addf pwmgen.update            servo-thread

# --- SPINDLE-PWM ---
net spindle-speed-cmd spindle.0.speed-out => hm2_5i25.0.pwmgen.00.value
net spindle-on spindle.0.on => hm2_5i25.0.pwmgen.00.enable
setp hm2_5i25.0.pwmgen.00.output-type 1
setp hm2_5i25.0.pwmgen.pwm_frequency 100
setp hm2_5i25.0.pwmgen.00.scale 3600

The ini file does not contain any spindle configuration settings.

Running the command: halcmd show all | grep spindle shows a low speed

    19  float OUT    0.01666667  spindle.0.speed-cmd-rps
    19  float IN              0  spindle.0.speed-in <== spindle-vel-fb-rps
    19  float OUT             1  spindle.0.speed-out ==> spindle-speed-cmd
    19  float OUT             1  spindle.0.speed-out-abs ==> spindle-vel-cmd-rpm-abs
    19  float OUT    0.01666667  spindle.0.speed-out-rps ==> spindle-vel-cmd-rps
    19  float OUT    0.01666667  spindle.0.speed-out-rps-abs ==> spindle-vel-cmd-rps-abs

The command halcmd show all | grep pwm shows:

    35  RT    pwmgen                                                ready
    26  bit   IN           TRUE  hm2_5i25.0.pwmgen.00.enable <== spindle-on
    26  float IN              1  hm2_5i25.0.pwmgen.00.value <== spindle-speed-cmd
    35  float OUT             0  pwmgen.0.curr-dc
    35  bit   I/O         FALSE  pwmgen.0.dither-pwm
    35  bit   IN          FALSE  pwmgen.0.enable
    35  float I/O             1  pwmgen.0.max-dc
    35  float I/O             0  pwmgen.0.min-dc
    35  float I/O             0  pwmgen.0.offset
    35  bit   OUT         FALSE  pwmgen.0.pwm
    35  float I/O             0  pwmgen.0.pwm-freq
    35  float I/O             1  pwmgen.0.scale
    35  float IN              0  pwmgen.0.value
    35  s32   OUT             0  pwmgen.make-pulses.time
    35  s32   OUT           801  pwmgen.update.time
                         ==> hm2_5i25.0.pwmgen.00.enable
                         ==> hm2_5i25.0.pwmgen.00.value
    26  bit   RW          FALSE  hm2_5i25.0.pwmgen.00.offset-mode
    26  bit   RW          FALSE  hm2_5i25.0.pwmgen.00.out0.invert_output
    26  bit   RW          FALSE  hm2_5i25.0.pwmgen.00.out0.is_opendrain
    26  s32   RW              1  hm2_5i25.0.pwmgen.00.output-type
    26  float RW           3600  hm2_5i25.0.pwmgen.00.scale
    26  u32   RW     0x00004E20  hm2_5i25.0.pwmgen.pdm_frequency
    26  u32   RW     0x00000064  hm2_5i25.0.pwmgen.pwm_frequency
    35  s32   RW              0  pwmgen.make-pulses.tmax
    35  bit   RO          FALSE  pwmgen.make-pulses.tmax-increased
    35  s32   RW          38025  pwmgen.update.tmax
    35  bit   RO          FALSE  pwmgen.update.tmax-increased
 hm2_5i25.0.pwmgen.00.out0.invert_output          hm2_5i25.0.gpio.000.invert_output
 hm2_5i25.0.pwmgen.00.out0.is_opendrain           hm2_5i25.0.gpio.000.is_opendrain
 00035  7f3d56f07a3a  7f3d5a102680  NO       0   pwmgen.make-pulses
 00035  7f3d56f07b7b  7f3d5a102680  YES      1   pwmgen.update


 

Looks like you have both a software and the 5I25s hardware PWMgen
in your hal file, all the software PWM stuff should be deleted for clarity.


I would expect a very narrow pulse at a commanded PWM value of
1 and a scale of 3600 (just one bit time out of 4096):

26 float IN 1 hm2_5i25.0.pwmgen.00.value <== spindle-speed-cmd

With more testing, I found it will work if I set the speed with the S command and use M3 M4 and M5 from MDI. If I set the speed with the S command in MDI and use the buttons in Manual Control the speed gets reset to 1. I can increase and decrease the speed with the speed plus and speed minus.

I know at some time in the past I could set the speed in MDI and control it from Manual Control.

Looks like some kind of axis setup issue
("1" seems like a default value of some spindle parameter)

May need to open a thread on the Axis GUIs spindle setup
to get the attention of someone knowledgeable about spindle
setup for manual control in Axis...