Re: [CAD_CAM_EDM_DRO] Re: Re: abrasive wood?

In a message dated 10/29/2000 11:28:48 AM Hawaiian Standard Time,
ballendo@... writes:

<< 1) The heat of the cutting process(you said you guys use a thermwood,
so I assume you are going FAST. Good thing. FASTER is BETTER. Have
you tried vortex cooling? Big help.

2) The binder/glue/adhesive used in the material is generally much
more damaging to the carbide than the wood. It makes for
an "interrupted" style cut, like machining a rough casting. (In
addition to its' own hardness.)

Hope this helps.

Ballendo

HSS cutters
are still "sharper"(smaller grain size) and better for many solid
hardwoods! >>


Ballendo,

Yes we run a Thermwood C-53 at our day job. Got a 10 hp VFD 500-23,000 rpm
spindle, it's unreal. Cuts through MDF with a 3/4" carbide spiral cutter at 2
to 300+ inches a minute. Fills a 55 gallon drum in an hour. I've tried the
HSS. Does work but you gotta slow down and you gotta have everybody on the
"program". The first guy who forgets to change back to carbide on a particle
board run and kapow, the bit is history. Vortex cooling is a neat idea. With
the auto tool changer, the dust collection shroud, the drop off flying
everywhere, I wonder how long the thing would last.


Didn't know about the binder/glue being harder on the bit. Makes sense. I
know the fire proofing is crystaline, you can see it glitter in sunlight. You
get gun shy running weird stuff cause the bit cost can wipe out profit fast.
Down time is longer than I wish too since the touch off procedure is
clunky....

Peter
THRD, Inc.