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Mcrist Welding Instructor
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MCrist
- 1/2 Star Member
- Posts: 1
- Joined: Wed Sep 29, 2021 9:33 am
Mcrist Welding Instructor
Hello, I am new to this site. I am a first year welding instructor and have a TruCut plasma table in my shop. I have joined this site to try to ask for help on the best way to run the table. I have no experience with plasma tables so I have a lot to learn to get it up and running. I will get more information on the table/ plasma cutter that is attatched to it to ask for help. Right now I can get it to run on the dry run settings but when I try to do an actual run the torch head will just drive itself into the plate and kick on. I do not know if there is some kind of sensor issue or what. I have tried to set home on the xyz and have the cut distance set to .125 of an in but it does not seem to be working. If anyone has any advice or knows where I can look up more information on this please let me know.
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acourtjester
- 6 Star Elite Contributing Member
- Posts: 8509
- Joined: Sat Jun 02, 2012 6:04 pm
- Location: Pensacola, Fla
Re: Mcrist Welding Instructor
Welcome aboard, great start to have the table following simple movements. Since it is a manufactured table I'm sure it has a torch touch sensor.
Now that can be one of 2 types or both, first is a floating head switch. This is a switch that detects the upward movement of the torch after it touches the metal surface as Z moves down (there is a slider type holder for the torch to allow this action). It should activate after and very short distance like 0.50" this signals the controller/software that has happened. This may be used as a secondary safety by the system in case the other (Ohmic sensor) fails. The other is an Ohmic sensor, there should be a wire to the tip of the torch with a Hypertherm plasma unit. I think TD uses a different setup, not sure as I have never used one. The Ohmic sensor also sends a signal to the controller that the torch has touched the metal (it works faster than the other switch) and is better for thin metal.
Now with that said you also need to used a post processor the generates a G-code with the commands for using these signals. From you description I would think the post processor is the problem this is part to the SheetCam plan for generating a G-code.
Now that can be one of 2 types or both, first is a floating head switch. This is a switch that detects the upward movement of the torch after it touches the metal surface as Z moves down (there is a slider type holder for the torch to allow this action). It should activate after and very short distance like 0.50" this signals the controller/software that has happened. This may be used as a secondary safety by the system in case the other (Ohmic sensor) fails. The other is an Ohmic sensor, there should be a wire to the tip of the torch with a Hypertherm plasma unit. I think TD uses a different setup, not sure as I have never used one. The Ohmic sensor also sends a signal to the controller that the torch has touched the metal (it works faster than the other switch) and is better for thin metal.
Now with that said you also need to used a post processor the generates a G-code with the commands for using these signals. From you description I would think the post processor is the problem this is part to the SheetCam plan for generating a G-code.
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Hypertherm PM65 Machine Torch
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