Hi. I’m very new to this. I’m trying to cut 3/8 hardened steel. Either way I was able to get a cut done last week so I just uploaded another g code to cut more and the torch will go to its starting point and then plunge down. Past when the IHS switch is triggered. The green light on fire control seems to be working as it should.
The torch will not fire and really puts a lot of pressure on the head.
I get a IHS fail error.
I’m assuming this is a code issue because it worked the other day.
Does anyone have a tool set for this I can get and upload into sheetcam ?
Pull off the plastic cover, and inspect your Z-axis assembly.
The IHS setup consists of two contacts and a spring that that when triggered, causes an open circuit allowing Firecontrol to know it touched off the metal.
Yes I have done that. That’s why I’m stumped. The IHS light on the screen is working with light pressure to the torch head. And I can manually push up on the head just a little to get the light on or hard and feel and hear the click of the connectors separating.
It seems to be a code issue but I went back and tried to use the same program I used last week and it still does the same crash into the table.
I guess I’m looking to understand why the z axis decides not to reverse once the green IHS light is activated and it looses contact. Rather it keeps moving down?
Thanks
I wish this would allow me to upload a video. I have a video of the head hitting the metal and continuing to push even as the IHS light is working properly on the torch fire screen.
I’m going to head to the shop soon and tear the z axis apart again I guess. Chase all the wires again.
I will mention that I also noticed the head moving a lot up and down during the last cut it actually made. Some
Other posts here have noted that is not correct. And that the machine is looking for voltage too much causing the head to continue to move up and down during the cut. Limit switch issue? But even with that right now I can’t get the torch to even fire to start the cut because of the constant down pressure on the z axis until code stating the torch could not tea the material.
Is not likely to be in the code, but open the code with notepad and copy and paste the first 20 lines here. We can look at the code and see if the line to raise the torch after the switch opens is there.
These two lines are what you are looking for:
G38.2 Z-5.0 F100.0
G38.4 Z0.5 F20.0
The first one tells the Z axis to go down(up to 5 inches) until the switch opens.
The second one tells the Z axis to move up ( up to 1/2") until the switch closes.