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Cutting Marine Grade Poly6/17
We are using an onsrud 52-701 for cutting plastic. The current speeds seem slow 200 IPM spindle at 15000 or so cut depth .375. I've changed the F200 with F450 and ran same program without any issue on part finish. Does it up 50% from there and still could not tell this part from the 200 IPM part. We do not release the part from the nest currently so question is how fast can I really go? If you talk to the tooling guys I've gotten mixed answers from them even different answers from the same company. Second we climb cut all parts which I have never seen. Is there a reason it could cut,
I'm a little confused by your question. The title is ply but the question mentions plastic. You don't mention thickness.
I'm cutting 18mm baltic birch ply in one pass at 900 IPM 18K RPM with a 2 flute 3/8 chipbreaker. All day everyday.
Have cut 3/4 ply with a 3 flute slow helix upcut roughing bit at 1200 IPM 18K RPM.
It's not helpful to advise feedrates because each part and cnc will have different performance characteristics. My suggestion is to program the upper end of your feedrate, say 600 ipm then start at 30 percent of your feed and start dialing up the feed until the finish degrades or parts start to pull free. As the feed rises you will see inertia caused defects at sharp changes in direction with a lightweight machine and will limit your speed.
If you are asking why your company would climb cut (if I'm reading your last few sentences right), it's because climb cutting tends to leave a more attractive (ie, less visible) cut pattern on it.
We've routed HDPE a number of times but never found the need to climb cut it, however I could see where certain bits would perhaps leave a nicer finish with a climb cut.