Help with thcad

Hello everybody, I am dealing with thcad since three week so far. reading some post I am able to hook it up and it seem to work as I see the current volts from hyperthem powermax 65 in volt-meter widget. the machine is cutting fine with thc disable but when it is enable any correction happened (Z axis doesn't move never). I checked the configuration files lot of times but couldn't figure out where is the error in the configuration files.
I hope someone can help me out.
attached all configuration files

thanks you

Did you hook up the ARC OK ?

It is not shown on your diagram.

In order for the THC to work the THC must be on , the velocity must within limits and the ARC OK must be on.

For temporary testing you could possibly unlink the ARC OK pin and set it to positive in Hal.

Rick G

it is not in the diagram but is connected as an input pin. ARK ok is hm2_5i25.0.7i76.0.0.input-20 it is hooked up to Mesa 7i76. You can see it in the .ini
regarding velocity limits how should set it up?

Thanks.

O.K.

When cutting with the THC on are both the arc-ok and velocity green?

Rick G

arc-ok is fixed in green but velocity is blinking all time (green and red). should both be fixed in green all time on machine is cutting and thc in on?

It will be green if the machine is moving within the velocity tolerance set at your panel.
On a long straight cut you would expect it to stay on green, however slowing down for a tight corner or curve the machine may slow down below the threshold and the indicator will turn red and the THC will turn off. You can try different settings for the velocity tolerance I believe 20 is the default. You can try different settings. Are you trying a long cut or very short segments or curves?

While making a cut watch the dro display to see the velocity the machine is actually cutting at.

Rick G

is the value of velocity tolerance a percentage of the total velocity from the machine? I mean
total velocity 100%
velocity tolerance 20%

thank.

There have been some different versions of the THC, however on yours I believe it is the velocity tolerance.
That is if you set your speed at 200 and you set the velocity tolerance at 20 then
200 * .20 = 40
200 - 40 = 160
So the machine needs to be moving at least 160 for the THC to work.

Rick G

Ok I understand, tomorrow I will do some test with these values and then I will tell you how it was.
Thanks.

Hello I've made some test today and I noticed that thc.status-vel never is true when machine is cutting. can it be a bug of the thc component. where can I see the source code of thc.comp i have installed in my computer?
I could prove that from this internet thc code I should get a thc.status-vel set to 1 but get always 0.

if(enable){
float min_velocity = requested_vel -(requested_vel*(1/velocity_tol));
if(current_vel > 0 && current_vel >= min_velocity){vel_status = 1;}
else {vel_status =0;}