First Cut with aluminum wasn't so good so after re-aligning the machine and ordering different bit I was able to cut aluminum like a cheese .. went pretty smooth. I tried to router clamp out of 3/4" thick piece and cut .7" of it then I made a little mistake so have to cut it again. But just want to let you know its cutting good ... I will post pictures later .
I'm tryng to go slower just because of having only one clamp at this moment.
Maybe I'll get some from you later on or I'll try to make mine.
also those are R2401 clamps.
here is my new test with my new router clamps.
[nomedia="http://www.youtube.com/watch?v=8CPtKZ1NDYg"]YouTube - ‪DIY CNC milling aluminum‬‏[/nomedia]
It was 5/8" thick aluminum Cutting at 10 IPM at full speed of the router which I think is 25000 ? and 0.0625 deep cuts, going to try 3/32 .
where do you get your mills at ? mine are TiaCN coated don't know if they going to last longer or not .... also I think R2401 has little bit of runout too that's why I think I'm not getting that good finish and actually having some stair steps. or maybe I just didn't align the router correctly ?
This is wha I was cutting:
Last edited by fastpcuser; 06-17-2011 at 05:10 PM.
The main thing is that your quality of cut can actually suffer going too slow, because you're just heating up the bit, which causes it to dull faster. The heat should leave with the chips; if you got pelted with one it should be hot. The other thing is clearing all the chips away from the bit. Flood coolant mught not be an option here, but compressed air or a vacuum helps, especially if profile cutting.
As for stairstepping: if you're not losing steps, and you believe it's axis misalignment (which it might just be) you could tell the direction the z is off by looking where the stairstepping occurs.
Back to cutting: don't be afraid to up the speed, even if it means shallower cuts. I would try 40-50ipm, taking .010 pass, then add .010 until the cut quality suffers, and then back down about 5-10 percent. I havevn't built my Momus yet, but I have all the parts. On my current machine I cut at 72ipm at .125"doc pocketing, and .063" profiling. Don't get too enamored with high-helix bits, 3-flute bits, and such because the flutes aren't as deep, and they aren't as free-cutting as standard bits. The cheap Atrax CNC carbide endmills that Enco sells works jsut fine...
[nomedia="http://www.youtube.com/watch?v=JVpKLBXvtSs&feature=channel_video_title"]YouTube - ‪DIY CNC Router, cutting BMX chain sprocket, Part 1: Pocketing‬‏[/nomedia]
I was thinking of getting SuperPid controller but not sure yet.