Interesting build. I like it ...

Did you think of turning the L brackets around so the 'tab' tying to the plywood goes outward instead of inward ? It should give a clean surface for your other layers (ex: spoil board). They would still hold the V-slot from the inside, just the legs would be outward ... The 'riser' could also have an 'alignment/hold' hole - horizontal screw or even just a tight pin wedged into the spoil board layer ?

Is the plywood apt to 'move' with humidity and such over time ? Maybe the shaking of the 'Charging OX' could affect rigidity with time and use ? Is it screwed down through the plywood and into more wood or whatnot ?

Getting the two Y V-slot parallel was probably no worse than with the regular OX approach, eh ?

I also passed some wiring through the V-slot beams in myOX. But I didn't add any holes, I used the existing openings (a bit tighter, but still plenty of room). I also used Chris' plates (great plates). My mistake was not using connectors on the ends of cabling ... When I had to take things apart, it was a pain to cut and splice as needed. At least I had left (too much) extra length in wires.

Looking forward to seeing your Charging OX ... running.

 

Nice ... Let's see that Charging OX run.

 

I like this!
In fact, I had the same idea!
I have also created 4 corners to put at the ends of the vslot to increase the lateral resistance

 

Looks great.

 

I can't see the video (private video)

 

very cool!

 

This build has inspired me to build an ox. What control board are you using?

 

Very nice! I'm also inspired to build an OX after seeing this. I'm still working on my SO2 just at the squaring phase and then wiring.

Where did you source the L Brackets? I couldn't find it listed in the xls file.
Do you have a rough amount on how much this build cost you?

In regards to wiring, you could use Cat5e or Cat6 cabling to connect the steppers. I've used them on the lasersaur project (2x4) laser cutter where Cat5e STP was used. I used Cat6 UTP on a Delta 310mm x 400mm 3D printer with thick 14 AWG power lines running in parallel to the cables and haven't had any issues on a 24hr print job. I'm planning on doing the same with the SO2 to allow for future upgrades by just disconnecting the steppers and replacing the cabling with longer cabling.

Before that I had to figure out if it was feasible to shell out and upgrade the SO2 to a 1000 x 1000mm version or just build a 2nd unit. Building a 2nd unit makes more sense after seeing this.

Thanks for sharing.

 

I think the L brackets are a good idea. I saw it used in another machine called the CNC mogul and in a video where the CNC machine is being used with a drag knife.



The laser cutter uses both Nema 17 and 23 powered by Cat 5e STP cabling. With network cable you need to double up the conductors. 8 wires = 4 pairs to match 4 wire steppers. There is one guy in the Lasersaur community with over 3000 hours using Cat 5e cabling running Nema 17 & 23 steppers.

 

I originally built the OX to the (almost) standard design. Seeing how you mounted your Y Axis rails to the table inspired me to change my design. I searched everywhere for brackets that would be suitable and it was difficult. I ended up sourcing them from a company I deal with frequently at work that handles aluminum extrusion. Unfortunately I do not think I am at liberty to share my contact for this piece.
The only problem I am having is torsion on the 1.5m X Axis gantry. Do you have any troubles with this? I can grab the end of the spindle and push it (along the Y Axis) and there is a flex of about 1.0 mm both directions. This affects both the Z Axis and Y Axis measurements. I've already bolted the two X Axis rails together and I am considering filling the extrusions with some form of epoxy or resin.

 

Is it possible to share plates drawings?

Very nice build, thank you.

 

I too have taken inspiration for my Ox build from this variant... I am using these "L" brackets for my build. I picked up a total of 8 of them.
http://www.mcmaster.com/#15275a66/=w114mc

 

In agreement with KRam242, your Sketchup skills are impressive.
Very inspiring build and very neat. Yea! a cost estimate would be great.
I wonder will you be able to cut a stronger material like Alu on this?

 

I was looking for brackets that wouldn't require machining, and initially found aluminum trailer bunk boards on ebay that would likely work http://www.ebay.com/itm/8-6-Tall-L-..._Accessories_Gear&hash=item3cbf1aa958&vxp=mtr . However, I just found some brackets on McMaster-Carr that are specifically made to mount t-slot to the floor/table. http://www.mcmaster.com/#47065T26

 

Hi, should you send us more details like weight, speed, working dimensions (x,y,z) and step accuracy (x,y,z) ? Many thanks.

 

Sorry for the late reply! Im talking about the main plates, i think they are similiar to the ones on OX Build.
Im moddeling your build on Solidworks but the plates i got from the OX build are not very accurate. The dimmensions are atrange.

 

Hi, OX plates, im getting measures in Cad and the dimmensions are all mess up.. im sharing the model in here after this if its ok with you.