Re: [CAD_CAM_EDM_DRO] injuries from your machine?

I've had some cuts from sharp edges on work and attachements, usually
caused by actively hitting them while moving about with hands. I've had
stray strands of hair pulled out by drive belts, but no clumps. Have never
had a pinch or other incident caused by machine tool itself, though once I
did get a finger mashed pretty flat by a small air-powered press. All of us
I suppose have had chip cuts, esp from snarled stringies, which is one
reason I wrote chipbreaking into my turning routines in AxWiz. I also did
twice have small chips in cornea, despite glasses. None of this is peculiar
to CNC though.

At 04:55 AM 5/24/02 +0000, you wrote:

>I have broken off at least 2 end mills by carelessly jogging the machine
>around during setup. One of them was pretty spectacular, with the broken
>half singing loudly as it spun some 20 feet across the shop, pinging loudly
>off the wall and flying back the other way.

I had a mill table shift over once due to slop in the ways and screws, shop
had pretty bad maintenance in all. But this was partially due to mill
haveng been ground so often it was cutting way down in gullys and needed
extra side force. It was on a 1" shank, pretty good sized bit to break for
a Bridgie!. It bounced and spun a few seconds, making a good bit of
distance as it did. The next things they heard were: me telling the shift
boss they had it all in place for a serious accident, then me quitting on
the spot, and then my motorcycle firing up and heading east. Two weeks
later, one of their people got sucked into a radial running a 4" spade bit,
by a chip catching his sleeve. He went around about three times before
somebody hit the BRB, and they hadda take it apart to get him out. Nearly a
deader! Why was he wearing a jacket? The heaters in shop were about 75%
non-working. You'd never see that one coming, but it makes a point!

Regards, Hoyt


Anti-virus request: Please do not add this email addy to address books
Belfab CNC - http://www.freeyellow.com/members/belfab/belfab.html
US Best MC - http://www.freeyellow.com/members/batwings/best.html
Camping/Caving - http://www.freeyellow.com/members/batwings/caving.html
Screw OPEC, drive a motorcycle!