I am trying to cut two parts from some cast acrylic sheet and am having zero luck. The acrylic keeps melting the plastic and welding to the bit no matter what feed/speeds I try.

I am attaching a copy of what I'm trying to make. Any help would be greatly appreciated.

Attachment 318850
Attachment 318852

I'm trying to use an Onsrud 63-520

I have already wasted a big chunk of the acrylic I bought. If someone can help that would be great.

Machine is a pro4896 nema34