I tried to cut some aluminum the last few days and despite trying many combinations of feed rate, cut depth and RPM, I always end up with loud squealing noise, which makes it impossible to let it run in my environment (neighbors), but I also assume this is bad for the tools/machine/material.
I looked at recommendations from this thread: Recommended speeds and feeds for Aluminum
That’s the one with 10-12IPS and 0.01" depth of cut (I tried 250mm and 0.2mm, and also some higher speeds with lower depth of cut).
The 0.2 mm depth of cut seemed way too much, it seems to get a bit better at 0.1 or even 0.05, but still there’s a lot of squealing. Of course then the job also takes 800-1000 minutes which is too long.
The cutter is a 4mm carbide cutter from Lakeshore Carbide.
1.) What RPM is recommended for aluminum, in addition to feed and depth of cut?
2.) What would be the expected duration for a job shown in the videos below?
3.) Where do I select the RPM? I did it in the tool’s configuration, is that where it’s supposed to be done or is there a more direct way?
4.) How high does the RPM effectively go? I tried up to 20000rpm but does it really go that high?
Here are some videos, the third one is the worst, that’s with the 250mm/0.2mm feed/depth:
(make sure to download the videos from the menu in the bottom right corner to get the full size/original version which is much better quality).
Do these videos look normal? Could there be something wrong with cutter or collet or a part of the machine?
Here are some settings screenshots, ignore the finish pass values, so far I didn’t get roughing to work.
(BTW: Could you enable video as an allowed file upload format?)