rs485 huanyang speed control

I rechecked the VFD to make sure it is set to accept commands from the communication port.
I commented out the classic ladder stuff in the .hal. It runs no different, so at some point I guess I can remove it.
The Axis Spindle Override slider also has no authority over the spindle.
Oddly, the Axis Spindle Speed indicator reads from 0 to 3000. Hmm.

Probing HAL Meter signals while adjusting the spindle speed using the + and - ....

1.) The spindle-at-speed remains false.

2.) The spindle-command-rpm and spindle-command-rpm-abs jumps from 1 to 101 then progresses as increase to 3000 and beyond the GUI indicator. Interesting.

3.) The spindle-command-rps and spindle-command-rps-abs jumps from .016666x and progresses as increase. I am assuming that these are a rev per sec.

Looking at the VFD display as the motor is activated, the frequency remains at 110 hz (my chosen minimum) and the RPM at 6600.

I read what you wrote about frequency scaling, and perhaps the frequency needs to be scaled, but before I do that I will need to learn whether the VFD driver is sending frequency requests or RPM, and also look into why others have not had this problem.

Eureka!!! I found the problem!!!

Donning safety google, because I am now sitting pretty close to the spindle, I energized the system, and launched LinuxCNC...

While probing the spindle-command-rpm-abs signal, I clicked on the RPM increase until I got over 6600. As soon as I passed it, the motor RPM went up, and the at-speed indicator finally went green. : )

The system was sending correctly scaled RPM commands, but the sent speed was lower than the user-set VFD minimum, so that is what it was giving me. (Apparently, Huanyang air-cooled spindles motors don't like running under 110Hz, the water-cooled ones below 100hz, so I had indeed set those values.)

Editing the custompanel.xml control, changing the 3000 to 24000, fixed the visual widget issue.

The too-many-clicks issue was lessened by editing the .ini [DISPLAY] section, adding:
Ref: forum.linuxcnc.org/21-axis/34056-spindle...nimum-starting-value

Though, the build code would have to be changed in Axis to change the increments, from what I have read, which likely should have been a ini variable.

I've removed all the classic ladder and PWM statements from my .hal.

Thank you all who helped me : )

I thought my first cut would be manual, but I used NativeCam to cut a pocket in a scrap of plywood.
It made chips!

Thank you again!