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If you were cutting 1" Polystyrene "Ultraboard" and the smallest cutter you had in a double fluted spiral upcut endmill was 5/16", what feed rate and RPM would you use?
-------------------- Wayne Webb Webb Signworks Chipley, FL 850.638.9329 wayne@webbsignworks.com Posts: 7403 | From: Chipley,Florida,United States | Registered: Oct 1999
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posted
slow rpm and fast feed speed.. move them chips fast or it will melt.
-------------------- Leaper of Tall buildings.. If you find my posts divisive or otherwise snarky please ignore them. If you do not know how then PM me about it and I will demonstrate. Posts: 5273 | From: Im a nowhere man | Registered: Jul 2001
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I had trouble with the pink (or blue ) extruded polystyrene melting to the bit. We used a spray bottle of water to mist the bit and the area ahead of the cut. It helped a little.
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update The how-to on Alumapanel's site recommends a 3/16" double fluted up-spiral cutter with a feed rate of .85 in/sec(slow) and 18k rpm . My smallest cutter is a 5/16" and the closest the router sets to that is 19k so I set the rpm to 19k@ .85 in/sec and it cut the stuff very nicely; much smoother than the higher rpm and faster feed I had tried. I'm happy with it. Thanks
-------------------- Wayne Webb Webb Signworks Chipley, FL 850.638.9329 wayne@webbsignworks.com Posts: 7403 | From: Chipley,Florida,United States | Registered: Oct 1999
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I did some 3D routing of styrene a few months ago, with a ballnose cutter, and the static made the stuff go everywhere. I went fast, as if I was cutting HDU, and it worked out 'just right'.
However that was a refrigeration styrene that is pretty stable-not affected by turps, metho, or thinners. It wasn't standard polysryrene the white stuff used for packaging etc.
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"...there are no limits when you aim for perfection..." Jonathan Livingston Seagull Posts: 7014 | From: Highgrove via Toowoomba, Queensland, Australia | Registered: Dec 2002
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