motion.analog-out-00 Scaling M68 output with Pot on 7i76e

I have a setup where I need to re-map the spindle analog output on the 7i76e to a standard analog out so that I can change my output with M68 and not break corner rounding (basically the process cant stop, but I need to be able to change a pump speed on the fly)

I currently have a hal file working with M68 outputting the expected voltage, But this breaks some of the current tuning workflow we use. Basically nothing about this is an exact science yet, so the operators were playing with the "spindle speed" sliders until the pump was just right and then the process went a long from there.

I need to give them a way to tweak M68's output on the fly and I think a good way is with scaling its output through a pot.

Ive been trying multiple ways I've found on the forum to scale something like feed rate in an attempt to understand what I'd need to do, but so far I've not had much success.

below are my hal files for current state.

You could add a scale component with its gain pin connected
a 7i76 analog input hal pin. and input connected to motion.analog-out-00

Ok. I think I am close, but I am definitely not right. Any help here would be awesome.

Here is where I am at. I will be digging more into this tonight most likely.

I was thinking more something like this:

# Pump speed control setup
loadrt scale names=pump-scale
addf pump-scale servo-thread

setp hm2_7i76e.0.7i76.0.0.analogin0-scalemax 2

net pump_override hm2_7i76e.0.7i76.0.0.analogin0 pump-scale.gain
net pump_gcode_speed motion.analog-out-00 pump-scale.in
net pump_speed pump-scale.out hm2_7i76e.0.7i76.0.0.spinout

YESSSS this is it. THANK YOU. Ive spent two days trying to figure this out.

Off topic. Is there somewhere that has a bunch of hal examples of things like this?

Im looking for simple things like putting pots on feed and speeds that can help me understand loadrt, setp and net better.

Have you looked through the hal tutorial?

linuxcnc.org/docs/html/hal/tutorial.html

Yea, that's exactly what I'm looking for lol. Had no idea it existed. Thank you.