Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: makcnc on August 10, 2015, 04:34:50 PM

Title: about : allow thc up/down control
Post by: makcnc on August 10, 2015, 04:34:50 PM

hi people
in the config >pins&ports>mill options
there  is thc area and a check box of allow thc up/down control
can any body explain how to identify the thc up / down output pins
and how this mechanism works
 ;D

Title: Re: about : allow thc up/down control
Post by: beefy on August 11, 2015, 10:09:02 PM

THC UP & THC DOWN are not outputs, they are inputs.

Normally, an external torch height controller sends UP and DOWN signals to Mach, and then Mach will move the Z axis up/down accordingly.

To identify the THC UP/DOWN inputs, go to Config / Ports & Pins / Input Signals. There you will see which port and which pin is used for each one.

The tick box "Allow THC UP/DOWN Control Even When Not In THC Mode" is for when you have manual switches wired to the THC UP/DOWN inputs and you want to manually control the Z, even if THC is not switched on. This is typically done with oxy acetylene cutting where you may not have a THC control and you just adjust the Z height manually.

Google for the Mach2 Mill manual. It has a good explanation of how Mach THC works.

Title: Re: about : allow thc up/down control
Post by: makcnc on August 14, 2015, 06:58:55 AM

thanks brother 
good explanation