Rotary Encoder to adjust Jog-Speed?

Hi

I build parallel a pendant with a arduino mega.

everything is up.. i can select axis xyz ,select the scale (0.001 0.001 0.01 0.1 1).
I can adjust spindle feed snd rapid overrides.

now is my wish to adjust the speed when i jog.
i done this manual with mouse on desktop..

but i cant find the right hal pin

does someone have a idea ?

thanks!
 

All the halui pins are in the docs
linuxcnc.org/docs/stable/html/gui/halui.html#_joint_jogging

halui.joint.jog-speed (float in) - pin for setting jog speed for plus/minus jogging.

i connect a potentiometer to it and bring it in the hal together...

i see that halui.joint.jog-speed changed when i look to the halpin.
but the jog speed doesnt change when i jog.

i jog with the pc keyboard!

is it possible that this is only working when you jog with like a joystick???
or a button on a pendant for plus and minus???

i use a handwheel... my target is to move from increment to increment with a selected speed.. like:

i select joint 0 and increment 0.1 with the rotary switches on my pendant, then i rotste the handwheel.. the jog speed is the same wich is selected with the jog speed bar in AXIS. now i want to adjust this Speed with another encoder or pot.

but i understand it works only with buttons for + - axis movement together.
and this is what i understand that it works like a joystick.

or i am complete wrong?

i stuck at his point i think its not possible ..

Hello,

I think "almost everything is possible" somehow, but to be honest I did not really follow what you exactly want to do. Maybe you need to elaborate your "functional description" more?

e.g. On my small hobby mill (LinuxCNC) the speed depends on how fast I move the MPG (Manual Pulse Generator). (I never missed jogging at constant speed here, for small stuff I use MDI). (e.g. G91 G01 x10 F200 G90)

Most commercial machines that I see around here, have a separate set of jog buttons. 
And sometimes a selector switch for the jog speed.

Greetings Timo

i use a mpg and i add more smaller step scales. like 0.001 0.005. i was on the wrong way! sry!