Aluminum Knob

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McOtis
Posts: 80
Joined: Sun Feb 09, 2014 12:21 am
Location: Maryland

Aluminum Knob

Post by McOtis » Thu Jul 10, 2014 1:32 am

After many attempts I finally got my machine milling 1/2" aluminum plate. Here is a knob I quickly designed and milled out.

https://plus.google.com/115138364221136 ... Z9vQrsi8N8

A preview:
Image

I used a 1/4" 4 flute bit.

Speed was slow! Feed was 15 ipm and 1 ipm Z. Only 0.01" per pass too.
Very conservative but it worked. Took 40 minutes. Used cutting oil occasionally.

McOtis
Posts: 80
Joined: Sun Feb 09, 2014 12:21 am
Location: Maryland

Re: Aluminum Knob

Post by McOtis » Thu Jul 10, 2014 1:45 am

I wish I knew what type of aluminum it was. It was scrap I acquired. My next project with the plate will be a mount for my new Makita 701C router.

UlteriorMotors
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Joined: Wed Jul 09, 2014 3:29 pm
Location: Nomad
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Re: Aluminum Knob

Post by UlteriorMotors » Thu Jul 10, 2014 7:08 pm

95% chance it's 6061 aluminum.
--
Jeremy Bloyd-Peshkin

http://ulterior-motors.com

Ing Chao
Posts: 72
Joined: Fri Dec 28, 2012 7:10 pm

Re: Aluminum Knob

Post by Ing Chao » Fri Jul 11, 2014 12:54 am

Nice work, I hope to get my machine to that point. Any tips?
'Oko #1153- D Extended Y axis-1000mm. Dual X axis makerslide-900mm Nema 23 X and Y axis motors. Arduino Uno and Grbl shield controller running on 24v.

McOtis
Posts: 80
Joined: Sun Feb 09, 2014 12:21 am
Location: Maryland

Re: Aluminum Knob

Post by McOtis » Sat Jul 12, 2014 8:20 pm

For my machine the 1/4" bit really helped a lot. Otherwise the 1/8" bit flexed a lot!

McOtis
Posts: 80
Joined: Sun Feb 09, 2014 12:21 am
Location: Maryland

Re: Aluminum Knob

Post by McOtis » Wed Jul 16, 2014 12:48 am

BTW here is an aftermath showing the waste material and debris. Image

criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: Aluminum Knob

Post by criznach » Wed Jul 16, 2014 5:15 pm

Mind sharing your feeds & speeds for the 1/4" bit? Any problems?

WillAdams
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Re: Aluminum Knob

Post by WillAdams » Wed Jul 16, 2014 5:23 pm

criznach wrote:Mind sharing your feeds & speeds for the 1/4" bit? Any problems?
He already did, and it's in the wiki too: http://www.shapeoko.com/wiki/index.php/ ... inum_plate

http://www.shapeoko.com/forum/viewtopic ... 84&p=28391
1/4" 4 flute bit.
Feed was 15 ipm and 1 ipm Z. 0.01" per pass too. Very conservative. Used cutting oil occasionally.
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: Aluminum Knob

Post by criznach » Wed Jul 16, 2014 5:30 pm

Oops! Excellent!

McOtis
Posts: 80
Joined: Sun Feb 09, 2014 12:21 am
Location: Maryland

Re: Aluminum Knob

Post by McOtis » Wed Jul 16, 2014 8:52 pm

Problems?
Not at first.
However last night I milled a larger knob and long story short, my bit was destroyed at the very end. All "4 corners" of the bit completely sheared off.
I think I know what happened; my dust shoe and vacuum collection got clogged up.
I had several small aluminum piles of debris when I finished and cleaned up.
This may have caused the chatter which then shattered the bit.

Once I mill out some aluminum mounts for my new Makita router, my days of milling aluminum are over.
Messy, problematic and not worth it. Assuming I get that far!
As you can see in the photo above, I had 2 failed attempts already for some test mounts.

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