Give them a bit of time, they are very busy, but produce and ship fast.

 

Here is Chris Laidlaw plates on Ebay:
http://www.ebay.com/itm/Openbuilds-...tes-/261475896332?hash=item3ce12d8c0c&vxp=mtr

 

Thanks Digger... I was busy making and shipping a set of plates to Alaska today.
Building and using an OX CNC seems like a perfect project for the long Alaska winter that is just around the corner.

 

Let me add that I purchased a set of OX plates from Chris through E-Bay and there are beautiful, he really goes all the way in his manufacturing.

Doug M

 

And I thank you Chris, sounds like the plates will be hot off the mill to warm up that long Alaskan winter. But I must say winter is one of my favorite times of year!

 

I just got a set of plates from Chris.... they look great!!

 

Just curious, is the shipping charges based on weight of whole order? I'm thinking about getting other parts such as nuts n bolts from local supplier just to shave a few dollars off the shipping. Is it worth it?

 

Little Fiber OX update for you guys

LD3X installed and mounted along with some HDPE wire clips to keep things in place

And here a short clip of me testing and calibrating GRBL

 

Nice Robert

How did you connect these steppers? I have purchased the same from FuzzTech. No connect on Black and White center taps? Keep up the excellent work!

 

@Dave M Exactly, you have one coil on red and yellow and the other coil on orange and blue

 

Thanks DDDman

 

Great motors

 

They sound good eh?

 

Yes indeed, they are set to the max the little stepsticks can pump out and @1/16 micro stepping.
No issues as of yet

 

I am in the process of building something like an OX. Right now I thought I would post some details on my mount for my spindle. I have chosen to use a Bosch Colt. I first cut out a basic mount out of 1/4 inch MDF. I will post a picture of that. I managed to cut this out on my Phlatprinter. Not very accurate but it worked.

Then I designed a mount with a port for a 4 inch dust collection time hose. This is also made of 1/4 inch MDF and painted red. I have the frame for the dc boot in there as well. Still need to add the skirt. Magnets are installed to hold this on.

I added some partial board to the table and surfaced it as a temporary table to cut on while I work on my vac. Here are some more pictures of the mount. I designed the mount to have about a 2.5 inch offset for the dust collector. This gets it out of the way of the front of the cutter but doesn't take up a lot of width on the left side. I loose about 2 inches of cut width, but had 31 inches to start with. Now I have about 29". I can also cut about 50 inches long. The mount is extremely rigid, much stronger than the machine itself.




Finally here is a picture of the whole project so far. My electronics are in a controller box under the table.



It is cutting pretty good right now using LinuxCNC. Tried using an old CNCUsb Mark I board that I have first and did not like the results.

 

Hi all, I have just completed my OX using aluminium plates from a guy in Australia (I'm in New Zealand). Everything mechanical is working great. Would anyone be willing to share their grbl settings for the standard OX, I'm using all of the parts e.g. stepper motors listed on the Openbuilds site.

 

I have my acceleration set to 100
Seek set to 10000
X and Y set to 53.33
Z set to 400

This is using drivers set @1/16 step rate

 

Thank you mark for the positive comments.

It turns out that the MDF mount as designed is extremely rigid. I cannot register any flex in the structure at all. I expect that at some point I will try cutting Aluminum, but for now I need to focus on getting a Vacuum table built with removable spoiler boards. I plan to relieve the spoiler where my cuts are so that the bit can fly through foam at very high rates of speed (400 ipm) without interference with the spoiler board. I will switch out 1/4" spoiler boards as I switch out parts to produce. I also still need to suspend my dust collector hose from the ceiling on a track and come up with a mount to hold the monitor in the corner of the table.

I am also getting more flex in the middle of the cross axis than I like. Thinking that I may tap and place a few screws between the 2- 20x60 beams to make them more rigid. I tried double sided tape between the beams before construction, but they just separated as the v-wheels are just far enough apart to pull them apart about .020 inch.

I am running about 45 volts with Nema 24 motors and have plenty of torque even at high speeds.

The brackets that I used to mount the rails to the table are just 1/4 inch thick by 3 x 5 inch Aluminum Angle Iron. Turns out to be a pretty cheap solution and makes for a very rigid rail all along the 1500 mm length.

 

Just like to say, my plates from Chris showed up today and they look GREAT!

 

Awesome, thanks Robert.

 

With the fantastic guidance and help of David, I've got the precision of cutting down to less than 0.02mm, making (nearly) perfect squares and circles. Even a 45 degrees turned square was coming out perfect. Now some serious cutting should be possible.

 

Np

Here it is, the surprise part of the Fiber OX.
Pew Pew! It's a frickin laser man!
The 445nm OX

G-code sender

Final test burn to check calibration

And the final results

 

Nice man, laser is my next project for my OX. I will knock on your door when it comes to it (with your permission, of course).

 

Had to see if an other program would give same results, so its at least repeatable over the programs I'm using. It is.

 

Oh and before I forget, if there is anyone else in NZ considering purchasing from Openbuilds, don't hesitate! These guys are great and the shipping costs are excellent considering it is shipped from the US. I'm on my third order already and not a tee nut out of place. I even used these guys as an example of great customer service at a seminar I was at last week.

 

Now I can't wait to get mine finished. Room should be done by weekend (fingers crossed), and then I can finish setting it up.
3D printer parts should hopefully be here by then as well.

 

Robert Hummel, that is sweet. I would love to get a BOM to add that to my OX. Plus maybe some pics, short writeup/tips, etc...

Rich

 

I agree with that, David. A simple spreadsheet would do the trick, which can be published under resources. If you don't have the time for it, I'm willing to take up the challenge and pour the thing in a spreadsheet. I think I understand how it works now, thanks to your excellent guidance and patience. I will first pass it to you for editorial input, in that case. Let me know.

Maybe it is even possible to account for a certain amount of stretch? By measuring original cutting length and the length after mounting it and stretching it?