[bjm323]

Decided to play around with BobART and my Taig see what I can do. Here is my problem. I was test cutting this in some black Delrin. Started lower right(4 o'clock) and worked to upper left(10 o'clock). It's kind of hard to see but the cut is a little rough until it gets towards the end and then it really smooth. I was wondering what would be the cause for this? I was using a .020 ball end with a .003 step over, .020 DOC, 9000 RPM with 12 IPM feed.

[bjm323]

I forgot to mention this is a fairly new machine with maybe 20 hours on it max.

[Jeff-Birt]

With plastics you need very sharp tools to get good results. Also, if you did not surface the stock first and/or your mill is not in tram you will have perhaps a few thousandth of depth difference across the piece.

[bjm323]

I would understand a dull tool if it got worse as it progressed across the piece but it's the opposite here. There is about .0025 difference in depth from one side to the other. I didn't face off the material before cutting. I was just testing to see how the subject would look before I cut it in some aluminum. Thanks.