Hi all,

I have a thc300  torch height controller that i cant get to work properly. 

Everything appears to work correctly but the THC will not make z-movement corrections with the THC enabled (thc Lite flashing).  All the mach3 leds (up, down, ark ok) appear to lite up when required, except the torch active led.  The "torch active" led does not lite up under any condition.  Also the thc correction dro never changes from 0.000    While the torch is cutting material,  the led display shows a dc voltage that seems appropriate to the torch to material distance.  This value changes as the torch to material distance changes.

I am using a smooth stepper and a pmdx-131  break out board  for interface , Sheetcam with the THC-300 post processor to generate my code.  The torch offest portion of the code appears to work, but not the correction.

Does anyone know why my z-axis correct  ?


Any help is greatly appreciated

Thanks
 

I am using a smooth stepper

i think this is problem ,SS dont work with THC

Amir

really,   can you explain further.   The smooth stepper accepts a 2nd parallel port and the  s/s diagnostics page shows the input being activated (i.e up, down)    Is there something im missing ??

i think Hood can help you.

Amir

hood,

Can you help explain why the smooth stepper cannot be used with a thc300 ??

i hear about this issue from Hood ,and i dont have SS card for test.
I too was surprised when I heard this ,because In practice, we need UP ,DOWN and THC OK input, and with SS no problem there.
sorry for my little information.

Amir

Afraid the SS does not support THC and it is not likely to do in the near future

Hood

Is there a way to use both the ss and the pc parallel port  at the same time ??