Sorry @Mopar32985, it was the advice of @David the swarmer to which I meant to refer ...

 

Could I use 5/16" all thread for the Z axis on the OX build? What is everyone else using?

 

I think my routy is using 5/16" allthread. Works great with no microstepping. Just get a very straight piece.

 

Thank you. I think I'll give it a try. If it doesn't work ~ lesson learned and move on. I'm hoping the parts store will soon stock all the parts one needs for this build.

 

Thank you. Bought my materials this morning. Local hardware wanted $1o each for the bearings! Got my OX 90 percent finished. Still need to order my Z axis step motor from Geckodrive.com and mount it. I absolutely can not get the play out of the Y axis no matter how much I adjust the eccentrics. Grrr.

 

I found that for MY motors, 6.5 mm drill bit was a better fit.

 

I figured out the y-axis play issue. It turns out that the gantry plates don't line up the screws perfectly and there's just enough room for them to be assembled out of whack so much that the eccentrics don't cover the play. So the trick is to assemble them in a way that the first bolt you tighten is one of the non-eccentrics and you must push the wheel towards the v-slot while tightening. Then do the same for the other non-eccentric. Then tighten the eccentrics but make sure they are set to have the max play. Anyway, I removed 1/8" of play on my y gantry this way. It will probably slip again when pushed too hard. Hopefully I can make new plates before then...

 

What's the proper bit?

 

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

 

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!

 

Two questions for anybody:
1) Where are you getting your pulleys for the OX NEMA 23 steppers?
2) How do you post photos on this forum? The image icon above asks for a URL. I don't understand.

 

Hi,


I’m going to build the OX CNC Machine and I received the Vslot Profile from UK today and I’m waiting for more hardware from Partstore USA
I have send the DXF file to a few mechanical workshop here in Norway to get a guote on the OX_Plates but It seems they have problem whit the .dxf file. One would like to have the file as a PDF, and another wants it in .x_t or .igs format. Is that something you ore anybody else can help me with?

Thank you in advance.

 

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

 

Thanks again Mark.

 

Hello
Regardind the lateral plates for OX, what thickness thet have if they was make from iron? at a plasma cnc machine

 

This is an awesome, clean design and is next on my build list. I have ordered most of the hardware and now just waiting for the rails to come back into stock before I can get started.

I had the Gantry plates waterjet cut here in Australia from 6mm Aluminium, they turned out very well. I cut 4 frame corner connecting plates at the same time to better utilise the material. When my eccentrics arrive I'll verify they fit properly in the holes. The holes seem to measure ok though.

If you are having a hard time finding/making the Gantry plates send me a message and I'll see if I can help.

 

I exported the files from sketchup to obj format(I think) and then imported into Blender. From there you can get IGES, STEP, STL, VRML, dxf, dwg, etc etc. Sketchup is the ultimate incompatible format, worse than MSOffice. They force you to use windows to run their program and then force you to upgrade to pro to get your data out in other formats. They give you a limited trial version for free and then lock you out after so many uses. There are dozens of free programs that do everything sketchup does (and more) and they use formats that aren't proprietary.

 

Just ordered my pulleys from http://www.bbman.com/catalog/product/20-3P06-6FA3 (Thanks again Mark) Had to buy 6 to meet their minimum order of $35.00. Only need 3. Total cost w/shipping was 55.80. If anybody needs 3 pulleys for their OX build I will have 3 I don't need and would sell for $27.90 w/free shipping. (Paypal preferred) These are the GT2 3mm as in the parts list for the NEMA 23 steppers.

 

Hi GrandPawB, I'd like to buy your Pulleys if you still have them and if you'll post to Australia.

I checked out bbman.com, but the min order combined with their international postage option was cost prohibitive.

 

I know what you mean. Minimum order is $35.00 PLUS once you get to the shipping section you'll find they charge an additional $5.00 for residential delivery. Sorry, but the pulleys I had were sold.

 

2/28/14 My extra pulleys are sold.