The "THC ACTIVE" indicator is not active.

There is a problem:
1. Hardware - Orange PI PC Plus
2. Software - LinuxCNC / AXIS Version 2.8.1 + AllwinCNC ( allwincnc.github.io/index.html ) - (mode2)

Due to the lack of THC modeling it with the help of the buttons. In general, the part works - to change the "Float Switch" and "Arc OK" signals, it is regulates correctly, however, the "THC ACTIVE" and "UP <THC> DN" indicators are not activated in any way and the corresponding variance of the z axis during the head movement is not controlled.
Please tell me what could be the problem?

The THC UP and THC DN LEDs can only be on if the THC ACTIVE LED is on.

"THC ACTIVE" can only be on if all the following are true.
The macine is cutting.
THC is Auto or Enabled in the THC frame of the Run Panel
THC is enabled in the Cut Parameters frame of the Run Panel
The cut velocity has reached 99.9% of the Cut FeedRate in the Cut Parameters frame of the Run Panel
The THC Delay in the THC frame of the Config Panel has timed out.

It turns out "1" and "2" should always be equal?


Where on "Config Panel" is the option "THS delay"?

Another questions:
1. What a mistake in the lower right corner - "joint 2 following error"
2. When operating in 0 mode, the ark-voltage-in input signal is supplied to what form (analog voltage, PWM with a certain frequent)? Can I enter analog voltage after a voltage divider 50: 1?

another question
where the minimum distance is configured to which the head will move, after receiving the signals Move Down, Move

That is set by the PID settings and the thc velocity.
There is no distance to set i PlasmaC or QtPlasmaC, not chinese THC.
The reaction speed can be set usually just by changing the P value from default 10.

tommylight wrote: That is set by the PID settings and the thc velocity.
There is no distance to set i PlasmaC or QtPlasmaC, not chinese THC.
The reaction speed can be set usually just by changing the P value from default 10.

Where can I find PID settings?

"Config" tab, THC section, "speed" in %
Set it to 12 and test.

Egor wrote: It turns out "1" and "2" should always be equal?

No. the actual velocity during cutting has to reach 99.9% of "1" before THC Active LED is on.

Where on "Config Panel" is the option "THS delay"?

Sorry, that does not apply for Mode 2.

When operating in 0 mode, the ark-voltage-in input signal is supplied to what form (analog voltage, PWM with a certain frequent)? Can I enter analog voltage after a voltage divider 50: 1?

The ArcVoltage input is a floating point value. Most folk get it by using a Mesa THCAD connected to an encoder and then use the velocity output of the encoder.

The ArcVoltage input is a floating point value. Most folk get it by using a Mesa THCAD connected to an encoder and then use the velocity output of the encoder.

Can I enter analog voltage to ArcVoltage after a voltage divider 50: 1 from plasma?

Why an error in the lower right corner appears - "joint 2 following error"?