Re: [CAD_CAM_EDM_DRO] injuries from your machine?

> [Non-text portions of this message have been removed]

Oops, I guess it was NOT obvious, as the attachment was deleted from the
post...

See it here:
http://enived.com/pictures/2002_01_28_accident/

----- Original Message -----
From: "Steven J. Devine" <steve@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, May 23, 2002 11:30 PM
Subject: Re: [CAD_CAM_EDM_DRO] injuries from your machine?


> > Have you suffered any injury in the use of your "homebuilt" or home
> > retrofitted CNC, EDM, or DRO system? Has someone you "allowed" (or
> > maybe DIDN'T allow) to use the machine gotten hurt?
> >
> > What type(s) of injury, and what have you done to prevent a
> > recurrance?
>
> I was not going to respond, but I figured this would be of some interest,
> especially due to the pictures... This was at the shop, not on my home
> machine, and it was a manual SB 10" lathe, not CNC, but nonetheless...
>
> Just in case it isn't obvious, the attached photo is an X-ray of more than
> 1" of a drill which broke off in the back of my hand.
>
> To some greater or lesser degree, the setup of the machine was partially
> responsible for the incident. I was removing a part from a (stopped)
> collet. As I reached for the collet closer, I accidentally hit the power
> swith (located just a couple of inches away from the closer lever).
>
> Surprised by the sudden spinning of the part, which I was expecting to
drop
> into my hand, I yanked my hand back, diagonally into the drill bit and
chuck
> in the tailstock. I was so startled, and yanked my hand back so quickly,
> that the impact made a loud *thok* sound. Everyone in the shop heard it,
> and assumed that I stuck my hand into a spinning 3 or 4 jaw chuck...
> (*SOMBODY* on the list has had to have done that at least once)
>
> Since I was pulling back away from the machine, the sideways force broke
the
> drill at the chuck. The drill had penetrated the back of my hand, and
> almost came out between the pinkie and ring fingers. Made a little tent
out
> of the webbing between the fingers, but did not come through. Around the
> entry point was a large blackish bruise (presumably from hitting the drill
> chuck so hard).
>
> Sorry I don't have any real pictures to show...
>
> I believe that better ergonomics, is the key. The power lever at work is
> long-ish, extending ebyond the housing for the switch, with a very light
> action. Easily engaged by mistake. Not the typcial short lever you
> typically see on a lot of other manual machines. The ease of accidentally
> engaging the motor was compounded by the switch location (near the collet
> closer lever).
>
> FWIW, the power switch on my home SB is located below the bed, away from
> anything else on the machine.
>
> I kept this image as my desktop wallpaper on my notebook, as a constant
> reminder not to go and do something stupid again... that and the scar
from
> the repair surgery which is slowly fading...
>
> Steve
> (Someday hoping to make both my home SB10 and Burke Millrite CNC)
>
>
>
> [Non-text portions of this message have been removed]
>
>
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