RE: [CAD_CAM_EDM_DRO] Routing speeds and feeds for plastic "sign" material

Alan:



The customers I have serviced that work with plastics use cutters specifically
designed for plastics. Also, your feed speeds would be rather fast, probably
between 100 and 600 inches per minute depending upon your spindle speed, the
cutter design and type of material. If your feed speed is too slow and your
spindle speed is fast, it should be fast, the material will melt because of the
heat buildup from friction because the cutter is sitting in the same position
too long. If your machine cannot achieve fast enough feed rates you would need
to slow down your spindle speed, if possible. There are charts for both feed
rates and spindle speeds out there. The company that manufactured your
particular faceplate material should be able to supply you with that information
including the type of cutting tool. If you let me know via my E-mail below the
particulars of your material and your router, I should be able to supply you
with that information.



Randy Abernathy
CNC and Industrial Machinery
service, repair, installation and
design

4626 Old Stilesboro Rd NW
Acworth, GA 30101
Fax: 770-974-5295
Phone: 678-982-0235
E-mail:
randyabernathy@...




_____

From: CAD_CAM_EDM_DRO@yahoogroups.com [mailto:CAD_CAM_EDM_DRO@yahoogroups.com]
On Behalf Of Alan Rothenbush
Sent: Thursday, September 23, 2010 2:48 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Routing speeds and feeds for plastic "sign" material






I'm tired of having a CNC milling machine and a CNC PCB router and still
labelling things with a Dymo labeller!

So I bought some of that standard sign material .. you know the stuff, soft
plastic, thin black layer on the top, white below.

First step was to route a hole for a fuse, next step engrave some lettering
below the hole.

I'll be darned, though, if I can figure out the speeds and feeds and whatnot for
this material.

Everything I do just seems to melt the plastic onto the cutter!

Any advice or pointers to some reading material greatly appreciated.

Alan

--
Alan Rothenbush
Client and Research Services
IT Services
Simon Fraser University





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