Does anyone have experience with cutting perfect small circles? I'm not having much luck, the quality is not impressive at all. I must be doing something wrong. I'm including some pictures that show the results. I have a 2009 PRSstandard 48x96 w/a 4HP spindle.
I used a profile cut with a 1/2" 48-072 Onsrud bit with a 16k spindle speed, a feed rate of 102 ipm and plunge rate of 18.
Another problem I encountered with the poly is melting. I was trying to drill some 1/4" holes through 1/2" sheet of poly, the holes were not very good quality mostly due to the melting. Unfortunately I don't have a Bot-drill only a spindle for this. Also the poly tends to attach to the bit and it gets very bad after maybe 4-5 holes drilled, then the poly on the bit starts to score the material.
Do you think I will have the same issues with melting on type1 PVC?
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