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A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 9:11 am
by PsyKo
Hello,

I've recently had time to plya with my 4th axis and I'm pretty happy with the results.

First, the model I chose is this one : http://www.thingiverse.com/thing:530088. Decided to only mill the torso.

For GCode generation, I used a trial version of deskproto 6. Didn't really had time to get used to it, but I managed to achieve this project.

Here is the result, viewed in my TinyG control software :
gcode01.jpg
Roughing passes on a 40mm diameter Delrin cylinder
gcode01.jpg (474.22 KiB) Viewed 2784 times
gcode02.jpg
Finishing passes using 3mm ball nose mill.
gcode02.jpg (448.28 KiB) Viewed 2784 times
I also made a finishing pass using 1.5mm ball nose mill, but the GCode is basically the same as the finishing pass above.

And here is the result :

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 9:12 am
by PsyKo
front.jpg
front.jpg (153.45 KiB) Viewed 2783 times
back.jpg
back.jpg (141.34 KiB) Viewed 2783 times

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 9:34 am
by Brian Stone
- "Is this some kind of bust?"
- "Yes, it's very impressive, but we need to ask you a few questions."


Great results for a first try. Great results for a 10th try, really. What is the largest diameter you can mill with it? And can you post some photos of the machine?

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 9:54 am
by lioramsalem
+1
Photos, information, etc..

Looks very impressive.

Regards,
LA

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 11:44 am
by cmcta82
Can you share information about your 4th axis, its very impressive!

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 12:04 pm
by PsyKo
Brian Stone wrote:- "Is this some kind of bust?"
- "Yes, it's very impressive, but we need to ask you a few questions."


Great results for a first try. Great results for a 10th try, really.
It's my first result with a completet 4axis CAM software. Before I did them using Cambam and some trickery.

My 4axis v1 presentation is here (The v2 is only a replacement of the 2 extrusion rails with a solid aluminium plate)
http://www.shapeoko.com/forum/viewtopic.php?f=30&t=2819

And my machine is here :
http://www.shapeoko.com/forum/viewtopic.php?f=30&t=1608

I can't get to my workshop now, so that will be the only pictures I can show you for now.
Brian Stone wrote: What is the largest diameter you can mill with it? And can you post some photos of the machine?
I do have a 80mm chuck. But the diameter is limited by the maximal Z of the machine. And to be honest I have no idea. I already rounded some 80mm support for the chuck. I think I can go bigger depending on the 4th axis setup, which is not definitive for now.

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 4:03 pm
by DanMc
Awesome work!

I had been shying away from building a belt-driven 4th axis, worried about backlash, but I may have to reconsider.

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 6:21 pm
by PsyKo
I do have a little backlash, but only because the belt is not properly tensionned.
I have to figure out a belt tensionner that fits my design.

Beside I'm working on a worm gear driven 4th axis for now. It should be smaller.

Re: A little journey in 4 axis milling.

Posted: Sun Feb 01, 2015 7:52 pm
by MeanderBolt
Holy crap. That's really cool. Man, if I were into chicks with no arms, or legs...
How long did this take?

Re: A little journey in 4 axis milling.

Posted: Mon Feb 02, 2015 1:39 pm
by PsyKo
MeanderBolt wrote:How long did this take?
Don't remember exactly, but it was ~4h of pure milling, including roughing, 1st and 2nd finishing passes.