Quote Originally Posted by irving2008 View Post
nothing whizzes anywhere.. just snaps off flush with the end of the collet!
Well at least we agree on that bit, same thing happens with larger sizes :whistling:

I did try an accidental fast cut once...

I was using CamBam and cutting an outline in 1/2" x 6" HE30 alloy bar. Rather than drill hold downs I used a CamBam facility to leave tabs around the bottom edge. 'Easy to saw out after and clean up with a file', I thought.

Didn't notice in the G-code that when it lifted and passed ove the tabs it was using G0's with the tool still 10mm deep in the slot previously cut.

I would have changed them to G1's if I'd spotted it, but I didn't.

Of course the groove forming cuts above had side loaded the tool and bent it. Riding free in the slot the tool found itself zooming through a slot it didn't exactly line up with.

Chip loading was minimal but the horrible graunching sounds resulted producing great gouges which were reflected in the clean up pass.

I even thought about hitting the abort button because I knew it still had 2 laps to go and I wasn't sure it was going to make it.

Maybe if I'd had 4 times the revs I'd have gotten away with it?

There was a problem with that.

The quill splines had been rattling when I was whittling a 5" x 1.25" iron bar so I added grease. Heavy clay loaded grease.

Shut it up a treat. Unfortunately I hadn't reckoned on the taper roller bearings being unshielded. Then I had a problem with the phase converter cutting out on over current when I wound the speed up.

As soon as I realised what was going on I flushed the quill through with engine oil until it ran oil coloured rather than black. Top speed again became an option.

I have been speed limited, maybe faster feeds will now be possible, I shall play.

OTOH 10mm/s still sounds very silly :heehee: