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

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Alan Rothenbush
Client and Research Services
IT Services
Simon Fraser University