Plausiblty check on feedrates

This weekend I again trashed a tool (luckily only a drill), but using an F50 (Expecting G94 50 mm/min) while in G95 mode. (at about 38:45...)


I have heard the some other controllers allow setting an error trigger if the feedrate exceeds a set threshold. I went searching if LinuxCNC offers an option to set a max feedrate it will error out on in G95 (would also make sense to have a min feedrate error message in G94, as I have also had F0.01, and then wondered why the machine didn't seem to move). I didnt find these options. Am I missing something or they really dont exist?
Cheer,
Mark

Mark-

My Fanuc 21 will alarm if you program a feedrate which exceeds the machine's capability during G94 or G95.  There are no settings; the control checks commanded RPM and FPR, calculates the IPM (or m/m) and vomits if you exceed the ceiling.  In my case, this is about half the max rapid rate.

There is no check to see if the commanded feedrate is a good idea - only if it exceeds the MFGR's max.

In your case you could probably set a ceiling which corresponds with your coarsest desired thread plus some headroom for accel... but that is probably still fast enough to crash a drill.
 
EDIT
Is there any reason for you to program in G94?  On my Fanuc lathe the only time I need to program in G94 is during live tool work or when I need to position the turret for the bar feeder with the spindle stopped.

Maybe just stop using G94 on the lathe?

Thanks, Andy also made that suggestion. You are right, I am kind of used to thinking in G94. Need to reprogram my brain.