5i25/7i76 analog spindle control on Lathe spindle

I will do the count verification later this afternoon. The encoder is hand made with 100 holes in the ring.
I had to change the sign in the ini file earlier to -100 to get things to work at all.

I downloaded a Tachometer app to my iPhone and it looks like at full speed the spindle is running close to 1000 rpm.

OK so it appears that the feedback is correct so it sounds
like the PWM scaling is wrong
 

So how do I fix that?

It depends on how the configuration file was created
With a pncconf created hal/ini file , doubling the spindle
OUTPUT_SCALE and related parameters in the .ini
file would be the correct approach.

[SPINDLE_0]
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 6000  
OUTPUT_SCALE = 6000
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 6000

 

I doubled those values from 1100 to 2200 and that seems to work from 100 up to about 1100 rpm. It is off a little more down about 75 rpm but there is less power down there anyway.

Thank you, Peter.