[msimpson99]

This was my first real milling test on aluminum. The 1/8" bit needs to have the chips cleaned or it will break so I added a tiny blower that runs off a small air brush compressor.



Im making som small clamps to use on the mill.

See more here:
Building the KRmc1 CNC

[hilasercnc.com]

good luck

[SCzEngrgGroup]

You'd be able to go MUCH deeper and faster using a 2-flute in aluminum.....

Regards,
Ray L.

[msimpson99]

At 9 IPM with a 3/4" stickout I'm getting about .0003 deflection on the 2 flute bit. Changing to a 2 flute .03 DOC and the same feed rate would get me .0005 deflection. I did this and while it was a little faster on the cut. The finish was not as good.

As it stands I could go a little deeper even with the four flute. .03 DOC would yield a .0005 deflection. .04 would yield a .0007. I was being a little conservative since this was my last 1/8" end mill.

In all this, the most important aspect of this part was blowing the chip out of the kerf.

The good news is that I just upgraded the mill with a Mach3 controlled spindle controller. The brushless motor now has an upward limit of 3200RPM. This lets me increase my feed rate. I can get a DOC of .03 with a feed rate of 12.8 and still only have a deflection of .0006. But I reduce the job time almost in half.


Bottom line though, if you only have one end mill, take it easy

[roundrocktom]

The good news is that I just upgraded the mill with a Mach3 controlled spindle controller. The brushless motor now has an upward limit of 3200RPM. This lets me increase my feed rate. I can get a DOC of .03 with a feed rate of 12.8 and still only have a deflection of .0006. But I reduce the job time almost in half.

3200 RPM? I suspect that should have been 32,000 RPM.

Milling aluminum is always fun. Thanks for posting.

[rusty13jr]

Looks great! Can't wait till I get to make clamps for my machine.

[msimpson99]

Sure would like to know why this was moved out of the benchtop forum? This definatly not the place for the post.

[bjones]

probably because the only reason you are posting is to advertise your books for sale

[msimpson99]

I have readers who frequent these forums, and as long as I present information and examples, what is the difference. If I had not posted an earlier message about my book, the post would have been like any other on the forum.

Several individuals use these forums to support the community. I am no different.

[bjones]

no you are trying to skirt the rules and get free advertising to make a buck, look at your signature, it's nothing but advertising your books. want to be legit then buy ad space with cnczone.