CNC Plasma Torch Crashes?
I have a question for everybody running a CNC plasma table. Have you ever had a torch crash? How bad was it and was there any damage beyond just knocking the work piece out of alignment (relative to the work offset)? I ask this because I'm still working on my Z axis design and thought of a way to have a precision holder for the machine torch that also incorporated a break away feature in case the torch ever got hung up on, or crashed into the table or material. Before I went through the trouble and cost of making it I just wanted to see if this was a real world concern or if I was just over thinking things.
Thanks
Re: CNC Plasma Torch Crashes?
We had a lot of torch crashes when we first bought our table. We developed a collar that clamps onto the torch and three spring feelers sense the top of the metal to prevent the THC from driving the torch down and causing a crash. Also the spring feelers can be used to probe for the top of the material at each new pierce and set the Z height to 0.
plasmapal.com
http://youtu.be/GCcmNgHjUqo
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Re: CNC Plasma Torch Crashes?
[QUOTE=PlasmaPal;1586734]We had a lot of torch crashes when we first bought our table. We developed a collar that clamps onto the torch and three spring feelers sense the top of the metal to prevent the THC from driving the torch down and causing a crash. Also the spring feelers can be used to probe for the top of the material at each new pierce and set the Z height to 0.
The type of crash I was asking about was during a traversing move, not a plunging move. My solution was to mount the torch to a plate that used three spherical magnets to hold it to the z axis. I can seem to fine the pictures I took of it but I do have a rendering of the SW model which is attached.
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Re: CNC Plasma Torch Crashes?
Check out Plasma Torch Protection System | Boss Manufacturing - Home. they have everything you need to get a circuit stop control torch holder or magnetic breakaway for just about any cnc table out there.
Re: CNC Plasma Torch Crashes?
This is my mk 2, they really don't take much making, been using this one for a while now, works well, one slight change since then, rather than glue the balls in position I just gave them a quick tack with tig.
DIY Breakaway torch mount - PlasmaSpider.com