Fanuc 21-TB M-Code Takisawa

[afterone]

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

[Al_The_Man]

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.
Al.

[Dan Fritz]

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.

[xyzer]

Originally Posted by afterone 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

We have several TW-30's that have the same problem....have you figured out how to resolve the problem?

[Ozemale6t9]

I agree with Al the Man. you would need to check the ladder to see what else needs is required. Chuck clamping by M code is sometimes an option, so it may be that your machine does not have this option even though th M code list shows it.

Also, make sure that this is the correct code. On all of the fanuc controls that I have worked on (various machine builders), chuck clamping was M10, unclamping was M11.

regards, Oz

[Stebedeff]

You need to put M05 spindle stop for sure. Or try putting a pauze line (G04 X1.0) between G69 (chuck open) and G68 (chuck close). I never needed to do so, but maybe it works.