Spindle speed and instatnly powered led

Hello,
I have little troubles with my spindle, I have to S1200 to get 12000RPM, S1800 to get 18000RPM etc, i tried many things with parameters but without results:
Generally PWM signal from motion controller card drive a 0-10V signal to spindle, when scale set to 24000 it won't work at all.
MAX_OUTPUT = 24000.0
OUTPUT_SCALE = 1
OUTPUT_MIN_LIMIT = 5000
OUTPUT_MAX_LIMIT = 24000
hal:
net spindle-pid-out  pid.s.output    => scale.gear.in
setp scale.gear.gain 0.00035
net spindle-output        <=  scale.gear.out
setp   hm2_7c81.0.pwmgen.01.output-type 1
setp   hm2_7c81.0.pwmgen.01.scale  [SPINDLE_0]OUTPUT_SCALE
net spindle-output      => hm2_7c81.0.pwmgen.01.value
net spindle-enable      => hm2_7c81.0.pwmgen.01.enable
net spindle-at-speed     <=  hm2_7c81.0.gpio.051.in_not

second thing I like to drive LED in qtdragon_hd which is instantly powered on after spindle enable:
in ini file in DISPLAY section I've added :
USER_COMMAND_FILE = CONFIGFOLDER/qtdragonrc.py
and code in file:
print('\nUser command file for following spindle.0.at_speed\n')

# needed to instance patch
# reference: ruivieira.dev/python-monkey-patching-for-readability.html
import types

# import the handlerfile to get reference to it's libraries.
# use <screenname>_handler
import qtdragon_handler as SELF

###############################################
# add hook to add a status request
###############################################
def before_loop__(self):
    try:
        #self.w.led_at_speed.setProperty('halpin_option',False)
        self.w.led_at_speed.setProperty('follow_halpin_state',True)
        self.w.led_at_speed.setProperty('halpin_name','spindle.0.at-speed')
        self.w.led_at_speed. _hal_init()
    except Exception as e:
        pass

# Here we are instance patching the original handler file to add a new
# function that calls our new function (of the same name)
# defined in this file
self.before_loop__ = types.MethodType(before_loop__, self)


but led won't work (i tried 'self.w.led_at_speed' and 'self.w.hal_led_atspeed'), i have simple relay to inform that spindle reach speed, which is working correctly but only led on screen not working

Thank You in advance for help

The scale is odd because you have the .00035 scale factor (so the full scale value (to get PWM=1) is 2857 )

Do you need the scale component? Eliminating it and setting the output scale to 24000 would certainly
simplify debugging.

With the existing scaling, setting the output scale (and max output) to 8.4 should be about right:

MAX_OUTPUT = 8.4
OUTPUT_SCALE = 8.4
OUTPUT_MIN_LIMIT = 1.75
OUTPUT_MAX_LIMIT = 8.4

But why would you do that?

MAX_OUTPUT = 24000.0
OUTPUT_SCALE = 24000
OUTPUT_MIN_LIMIT = 5000
OUTPUT_MAX_LIMIT = 24000

and no scale component is 100% easier to understand


 

Your remedy is working as it should and now i can set correct value, thank You. But I forgotten to tell that linearity of voltage 0-10V is terrible, I used scale for make it "more linear" and that works like a charm. Before on raspberry pi 4 i didn't noticed that strange behavior, it was simple as that to calculate resolution etc, but I also didn't use qtdragon display, when I switched to rpi5 then I noticed those strange things.
Now I bend it little by cheat real max rpm so its almost fit, but I don't like doing things in a slapdash way.
Below table how analog output voltage works for me...
value [RPM] / VFD frequency [Hz] / Uout [V] .
3000 30 0.8
6000 93 2.36
12000 220 5.6
18000 350 8.6
20000 396 9.6
21000 400 9.7

Depending on your breakout card, you may get better linearity by lowering the PWM frequency