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JoeM Master Poster
Joined: 09 Jul 2004 Posts: 122 Location: Jackson Hole, Wyoming USA
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Posted: Tue Nov 01, 2005 8:57 pm Post subject: Fanuc 21-TB M-Code Takisawa |
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Does anyone knows what kind M-code for error detect comes before
M68 (chuck close)?
Machine (Takisawa TS-20) freezes after command M68 because there should be some M-code before it _________________ Thanks.
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I would rather by Fly Fishing! |
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franke Master Poster
Joined: 26 Jun 2004 Posts: 161 Location: Indiana, USA
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Posted: Tue Nov 01, 2005 8:59 pm Post subject: |
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If you have the ladder display, you should see what is preventing the M68 from completing, all M codes are written in the ladder. The ladder shows all functions that are made (highlighted) in a string. |
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BillyB Frequent Poster
Joined: 27 Jul 2005 Posts: 60 Location: Lexington, KY, USA
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Posted: Tue Nov 01, 2005 9:02 pm Post subject: |
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If an M-code is not decoded in the PLC, then it will most likely hang up like you describe. The CNC outputs the M-code to the PLC, and the CNC waits for the PLC to confirm that the M-code has finished. If you program an M-code that the machine tool builder never assigned, the PLC won't issue a finish signal and the CNC stops. |
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BobanM Guest
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Posted: Wed Nov 02, 2005 8:47 am Post subject: |
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Interesting!
I have almost identically problem on Takamisawa TS-15 with Fanuc 6T, but with M82 function and I agree with BillyB explanation. But "chuck closed" is basic function and probably asigned from manufacturer. Besides, function is executed but "FIN" signal missing.
I found that cause of my problem is missing "UNLT.M" signal from "nonvolatile sequence memory" , whatever that is. Ladder is absolutly need for solve problem |
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