Z plunging beyond origin

[andrew2]

When a file is started from the origin, after 100% complete it then returns to origin, but very occasionaly it goes beyond z=0 and stabs the part. Kind of annoying after a 1hr delicate part has just finished.

The gcode doesn't show this plunge, my z axis brake clicks away and seems to work fine.

Any body know whats happening here?

[Montabelli]

check your setup file and make sure it isn't set to return to 0 after run. you should be able to set it so it can be sent where ever you want

[eruzich]

Did you ever figure out what caused this problem? It just happened to me after running a part with 2 tools. Drilled holes first with short bit, routed part with longer bit. Then after the program finshed the router went to the my zero in x and y then drop into the part and just stayed there as the router spun.

[andrew2]

I didnt find out why it plunges too deep no.
I just did as montabelli said, changed the setup not to return to origin, havn't had a problem since.

[Montabelli]

Did you ever figure out what caused this problem? It just happened to me after running a part with 2 tools. Drilled holes first with short bit, routed part with longer bit. Then after the program finshed the router went to the my zero in x and y then drop into the part and just stayed there as the router spun.

look at setup make sure it doesn't return to the original settings (offsets) after run. also I try and make sure the 0-0-0 is never over a part. that way, since Murphy is an optimist such mysteries as poltergeists are accounted for too, to some extent.