Torch height too high…Not correct as torch height was within reason. Even checked the THC module before cutting…
Clamp on… Air pressure 60PSI
basic delay is 0.5 seconds
If the torch is not touching the material on initial IHS then you need to lower it on the torch mount. Your torch is too high to continue to fire.
Lower the torch mount till the L is just under the clamp like in the pic.
3 Likes
ah…ok…will do and will let ya know…
even though THC says all is good?
Yes, if the torch isn’t hitting the material before the ihs switch is triggered then it doesn’t know how low/high you are off the material to start off at.
The THC doesn’t set the torch height. The IHS system does that. The THC just uses voltage readings to try to keep the Torch at the height set during the IHS loop.
ok, so how to check that the IHS system is working correctly, if only to eliminate that probem…
The tip of your torch MUST touch the material during the IHS cycle. If it doesn’t then the torch isn’t mounted low enough.
To all those who have Firecontrol systems, does anyone have a GCode snippet that just runs IHS cycles? Seems like an easy piece of code to me…
1 Like
Lift up on the Z axis and see if the IHS light turns green in the Firecontrol screen.
The IHS should be grayed out until you lift the Z axis carriage, which opens the IHS switch. If the light is Green ask the time, the switch is open or a wire is unhooked or broken in the IHS wiring. A common issue seems to be the brass ring connector coming loose from the switch.
Seems like I was searching yesterday and seen someone had posted it. I will look for it. I actually checked mine yesterday. I cut a small circle paused mid cut. Had set for .06 but it measured .075
The tack @nicaDd was on is that the torch is mounted too high to touch the material to trip the IHS switch. That’s an easy thing to check with a small GCode snippet.
1 Like
It isn’t a file but it is in the thread cut height calibration.
I think Langmuir should add the pic I posted earlier on where to place the torch holder in relation to the z-axis position… it places the torch travel pretty much in the middle of travel in the pos/neg directions with enough room to minor adjustments in either directions.
1 Like
Here is code from this IHS Calibration Topic that will just run the IHS cycle.
IHS Cycle.nc (188 Bytes)
This will leave your torch height at .063" (minus the true IHS Springback and Backlash of your machine)
2 Likes
Agreed. Its a very common problem and the instruction don’t provide any guidance or explanation of how the IHS system works and why the torch mount needs to be mounted where it does.
The OP said the error message was “torch height too high” which isn’t a message I’ve ever heard of, so I’m guessing it was the “torch not in expected condition” error. That error is only reported when the IHS switch is open at the start of the program. The “expected” condition is the switch closed.
The possible problems are that the Z axis is already bottomed out and the switch is open, an IHS wire is unhooked or a wire is broken.
1 Like
Thanks Jamie! Just what I was looking for,
@Lweissman you can run this file in FireControl and watch an IHS cycle, as @jde says, it should leave an 0.063" gap when finished.
You can manually edit the file and change the line:
G0 Z0.063 (Cut Height)
To any reasonable height you want (like 0.100" if you have a precision shim to use for a check).
1 Like
Ok all,
Just ran the snippet and after complete torch height as measured by feeler gauge was ~.063 depending on how ya measure…like a valve adjustment on an engine…lol… Torch initially way to low and needed to raise it up a good .25 or more to get the IHS switch to grey out a bit above the metal being cut. Then ran the program and got what I got…Hope this all works…
1 Like
Turn your air pressure to torch 70 psi. ,60 psi you will get misfires…
1 Like