flyrc,
Running 30 ipm at 2000 rpm = .0038 chip load on a 4 flute or .0075 on a 2 flute. That's heavy even for a 1/2" cutter.
You want to run about .0005 or .001 chip load on something that small (I'm being very conservative, calculating for harder material, substitute numbers that work for wood). To calculate the feed rate, use the knowns CL = Chip Load, RPM = Max RPM for cutter, FL = Number of flutes. Calculate the max RPM you can (safely) run your machine. (I generally run mine at 95% of max RPM)
CL x RPM X FL = IPM
or
.0005 x 2000 x 4 = 4 IPM :sleep:
To calculate the chip load for what you're running;
IPM ÷ RPM ÷ FL = CL
or
30 ÷ 2000 ÷ 4 = .0038
Keep in mind that the ply will have glue in it, which may be clogging your cutter as well, shortening it's life.
HTH
Rekd teh Inebriated