Quote:
Originally Posted by DampRobot
Yes, 6 IMP. We do throw a good chip though, nice little curls. It is quite slow, mostly because we have a mill mentor who is, shall we say, conservative, with his machine's speed. He is right to go slow, though, the chips look good and we have had problems with breaking tools in the past (and crashing into clamps, but that's another story).
I'm sure with those router speeds, you'll be able to go faster. We're running a very different type of mill (a HAAS toolroom mill), so take my cutting speed experience with a grain of salt.
Perhaps we do cut too slow, but since the chip looks good and our part tends to vibrate excessively if we push it much faster, I'm inclined to stick with what we have now.
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Just for perspective, whenever I CNC using a 1/4 HSS EM I run the spindle at 2500 rpm and cut at 10 IPM. For me HSS doesn't chatter till you get up around 20IPM, if you're chattering at 6 IPM you might want to look into your fixtureing and make sure you've got a nice sharp endmill.