Neither have I 

I just assumed that when fit the unit, having the G-Code created by sheetcam tell Mach3 when and when not to use the THC inputs would be a good idea?

I guess I was wrong

Maybe it does not matter?

If they are actual signals going out from Mach to a stand alone THC then likely M11/M10 will do what you want. You have M11 at the start of a line of the code and that sends the signal out as soon as the code starts to execute, M10 at the start will stop the signal, there is no delay as it was designed for laser firing.

Hood

This is a simple THC, it has three outputs - Arc OK, Torch Up & Torch Down.

I can only use up & down as I only have two spare inputs left on my board.

There is no feed from Mach to the THC, I presumed that having the THC-Off code embedded would tell Mach to ignore any torch up-down signals until it hit an THC-On signal. I am only guessing though.

The unit has an inbuilt adjustable delay that only allows outputs after a certain time from establishing a "Good" arc, I guess I just rely on this.

Does Mach ignore THC up/down signals when doing small circles etc?

Anyone?


Does Mach ignore THC up/down signals when doing small circles and corners etc?

This seems to be needed to stop torch diving.

I can't find much out about this.

Might want to PM either Ian or TP as they seem to be the two that know the most about Machplasma.
Ian = http://www.machsupport.com/forum/index.php?action=profile;u=1754
tp = http://www.machsupport.com/forum/index.php?action=profile;u=24665

Hood

Ok done, many thanks

For future ref, the feature I was looking for is called "anti dive", just need to figure out what level % of federate to set it for.

Thanks guys.

Have I got this right?

If I set "Stop CV on Angles" to 90deg, then set set THC anti-dive limit to 90%, if I then put triangle loops on the corners of external squares it will slow down, turn on anti-dive, make the triangle loop, accelerate and turn off anti-dive?

If they are actual signals going out from Mach to a stand alone THC then likely M11/M10 will do what you want. You have M11 at the start of a line of the code and that sends the signal out as soon as the code starts to execute, M10 at the start will stop the signal, there is no delay as it was designed for laser firing.

Hood

If these two macros were adjusted to press OEMButtons would that introduce a delay again??

I don't need external outputs just a way to switch Anti-dive on and off from g-code without introducing a delay which would cause issues when plasma cutting.

No idea, as I said Terry and Ian are the guys that can most likely answer your questions regarding Plasma.
Hood