Re: [CAD_CAM_EDM_DRO] Re: Re: Tool change

Yeah...and if your eyes happen to be in line of sight at the wrong time, it
might be the last thing you'll ever see.

What I had in mid was these standard wood working routers. Apparently your
all using some other kind of routers with special spindles.

Smoke
-----Original Message-----
From: ballendo@... <ballendo@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Monday, December 11, 2000 10:35 PM
Subject: [CAD_CAM_EDM_DRO] Re: Re: Tool change

>Smoke wrote:
>>You'd have a hard time convincing someone with a CNC router to
>>install a tool changer!
>
>Actually, I've had a harder time convincing them NOT to...
>
>But...
>It only takes once seeing a 20k rpm tool(and holder) go flying across
>the shop when the spindle "let it go" to NEVER want to use a tool
>changer with a CNC router again!
>
>This was a system which put the tools in holders at one end of the
>table (fairly common for this type of tool). What happened was, some
>swarf got on the toolholder(while it was sitting waiting to be used)
>and when the 'cone'was 'pulled into' the spindle, it didn't seat
>correctly... The router spindle began to spin up to 20k RPM and the
>eccentric motion (caused by the swarf on the tool holder) made the
>spindle let go! This could have been really ugly; fortunately no one
>was hurt...
>
>Ballendo
>
>P.S. The control was re-written to 'spin up' the tool just above the
>stationary position before moving across the table. Longer tool
>change, but like I said, you only ever want to see this ONCE...
>
>
>
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