OX makes its first cuts in aluminum and its looking great!
With the OX being a belt driven machine I was surprised to see it how well it worked but circles are close to being round and it did the job with out a hitch.
I used cutting oil (tapping) thats what I had on hand, I would have ran for the cooking oil but I was mesmerized on the cutting
I used @Robert Hummel settings on the Name file of his OX AI build. 10 inches per minute with 1/64 step down. I can't remember looking at the time but I believe it was about 30 to 45 min cut. Mad props go out to Robert for all the help in getting me cutting aluminum. I had never tried it before and he showed me the ropes and sent me the proper bit Thanks bro you rock!
Couple things to note;
The GRBL shield does not keep the motors powered once the code is not being sent to the board so you have to keep an eye on the Z axis if your acme has a hi lead pitch. Once the motors are no longer getting commands they are unlocked and that means the Z axis can lower just from the vibration of the router being on in some cases. There is a way to get it to lock in the firmware and we need to find it.
Chips, every where! You need to put up a couple strips of plastic or poster board or any shield materiel on the sides (inside) to keep the chips from filling up the belt track and coating the wheels. This becomes a quick realization about 5 seconds into the cut
A vacuum attachment is a must.
Your spoiler board will get oil on it, this is just a heads up really. It has to happen and its no big deal.
So before getting to cutting any aluminum I would strongly suggest to make the side shields and the vacuum attachment you will not regret the time spent to make them.
p.s. I know.. I know the plate is mounted backwards (I was in a hurry to get it mounted)

This proves that once you have an OX you can make more for friends and family by cutting out plate sets for them

On thing I need to figure out now is finishing of aluminum parts like this since this is my first cut. For the moment I just used a toothbrush with soap to clean out the chips when it was done. But there is a little 'rim' along the edges that needs to be knocked down. I was going to try a quick wet sanding for that a little later on.
Some eye-candy.

That's what I'm talking about!
As for the motor problem I did a hardware fix by keeping a constant 5v on the enable pins of the driver boards.
Have always wired that way so never ran into that issue and it may be that the sheild is turning the enable on and off.
A simple setting in the firmware to keep this pin high "5vdc" should fix your problem

For cleean up a flat surface, sanding block, wet sandpaper "800 grit" and dish soap.
Light handed sanding in 1 direction and for the edge simply bend off and sand on a agle if you want to keep the tool marks

I am also working on a build for a tumbler that uses 1-3mm bb's as the tumbling medium

It's easier to post pics

Thanks Robert I had intentions on posting that bit picture

Thank you

sounds like an awesome build!

A little side note that I should have said was wax paper is your best friend to save the MDF but the oil should only leave a stain as I have not had expansion issue, just my exp some may have diff results

Awesome job bud, OX came through on this one.
Yeh!

@GrandpawB

Give these a try: http://www.bbman.com/catalog/product/20-3P06-6FA3
Also sent to you in the message
We are working to have all stock updated soon for future builds.

Use the Upload a File button (bottom right) not the url image insert (top). I know its confusing and we want to fix that.

@SRHaugen hmm DXF should be easy for them to work with. Can you ask them what the error is so we can correct it? DXF is really the only way I can export them from SketchUp. Maybe someone with Autocad or Solidworks could try to import them and save them in a different format.

Try asking http://www.openbuilds.com/members/derwin-palacpac.761/
As he has had plates water jet cut and in the video it looks to be cad
Video is posted in the OX AI build
http://www.openbuilds.com/threads/ox-ai.361/page-3#post-2488

Welcome

That because you need pro to get proper exporters, like most cad system.

I have to respectfully disagree @The Dude . The only limit are the exporters and you can't blame them for wanting to sell that aspect of the program. Most will be using it for commercial at that point anyway.
I was teaching AutoCAD when I found SketchUp (back when @last owned it) I loved its intuitive gui and ease of use. It took me a little while to break of of the box of doing things one way, but I am glad I did. Sure there are a lot of features that need to be added (parametric) to make Sketchup better and I am hopeful they will be in time. I also believe in the right tool for the job and most cad packages are over kill for the work most of us do in them for hobby/shop use. If I was designing a complex injection mold for a company I would use solidworks or the like. But for modeling up a quick build of a machine, where all I really need to do is move the components in place, Sketchup is what I would use. Honestly though over the years I have found that most complaints about the SketchUp program have people who have not taken the time to learn to use it.
SketchUp is a free CAD system that works well for those who use it. I have tried all the new crop up of free alternatives out there since the onslaught of people wanting to learn 3D design so they can 3D pint a new stove knob and nothing comes close to the ease of use that SketchUp offers.
If you have ideas you would like to see in SketchUp 2014 to help make it a better program you can post about them here
https://productforums.google.com/forum/#!topic/sketchup/IbflqJjevk0[1-25-false]
This is just my 2 cent on why I use SketchUp and it works for me. So I guess it really comes down to personal preference for the job at hand.

@GrandpawB your more them welcome

That's very cool of you