spindle rpm readout

Hello, I am trying to get a rpm readout working on emc2 but not getting it set right in STEPCONF.
I have a simple encoder with 2 magnets hooked to board. I am controlling the spindle manually.
When I run stepconf I put 0 in PWM for PDM mode but not sure what else I need.
I have pin 17 set to Spindle Phase A, and the TRUE & FALSE is working in halprobe when I move spindle.

Hal config gives me this at approx. 140 rpm:
abs-spindle-vel 1.4
scaled-spindle-vel .02

but the readout always says between 0 and .1 rpms.
I definitely need to read up on this but mostly all I can find is info on spindle speed control. Stepconf docs don't really seem to have the answer
unless I am just totally missing it.
Any suggestions would be greatly appreciated, thanks!

what version of EMC are you using? I'm pretty sure the scaling is wrong (a bug) what is the scale factor in the post_gui.hal file ?

I am on 10.0.4 emc2 and the scale is at 2.000

I'm looking for the version of EMC a number like 2.4.3 or 2.4.6. It wil pop up when you load EMC.

in postgui.hal you should see something like this:


setp scale.0.gain 60
setp lowpass.0.gain 0.070000
net spindle-velocity => lowpass.0.in
net spindle-fb-filtered-rps lowpass.0.out => abs.0.in
net spindle-fb-filtered-abs-rps abs.0.out => scale.0.in
net spindle-fb-filtered-abs-rpm scale.0.out => pyvcp.spindle-speed

make sure the scale gain id 60 and not something else.

I assume you are using the pyvcp spindle display option in stepconf.

I have version 2.4.3

this is what stepconf put in my hal file:

net spindle-cmd <= motion.spindle-speed-out

setp encoder.0.position-scale 2.000000
setp encoder.0.counter-mode 1
net spindle-position encoder.0.position => motion.spindle-revs
net spindle-velocity encoder.0.velocity => motion.spindle-speed-in
net spindle-index-enable encoder.0.index-enable <=> motion.spindle-index-enable
net spindle-phase-a encoder.0.phase-A
net spindle-phase-b encoder.0.phase-B
net spindle-index encoder.0.phase-Z

net spindle-phase-a <= parport.0.pin-12-in-not

thanks

There should be more then one HAl file.
you are looking for the one called custom_postgui.hal ( I had the name wrong above)
Can you archive your files and post them?
EMC 2.4.3 definitely had this bug.

You will find the scale is :
setp scale.0.gain .01667

when It should be 60

you are right, I looked in my custom_postgui.hal and it had that .0166 number.
I was aware of this bug from reading another thread but was not looking in the right file.
I can't test it at the moment because I tore it all apart to do some wiring.
thanks very much for your help!

Great glad you found it. !