+Peter van der Walt
Like this?
Been sitting on my desk at the house for a month. I work on it when I have time. gantry plates are on rev 4, ha.
Plan on making a cut today…
Brother if you were closer you would be at the top of my list! It’s been really hard for me to control my excitement about this. And really appreciate the kind words from such a great builder as yourself.
I can grab any gantry with my hands and put real force into it and can’t get a gantry axis to flex, this is the most rigid thing I’ve ever built. Hopefully not too rigid.
Each drive carries two 8mm acme blocks that can be slightly adjusted to control backlash.
The whole assembly is meant to sit on stock material, no more cutting exact spoiler boards, no more Y deflection. X deflection even with a .8kW spindle does not deflect anything appreciable.
Another 20x80 can be added to the back of the X and the front Z gantry plate duplicated to have front and rear controllable Z axis. A rear controllable Z would make for a beautiful mount for a laser.
This is all just words though till it’s actually cutting. I hope to have a cool video to share later today.
The issues I have right now with this build, it’s expensive! The second is the gantry plates are mostly two machine processes, has to be flipped over, put in a jig and the other side done. This will make the plates a pain for a lot of builders and expensive if one were to have them made at a machine shop.
So a lot more to come. Time will tell if it’s a good build.
So this is a lead screw driven X axis machine?
This thing is a work of art @Brandon_Satterfield way to go brother! Looking forward to building one of these bad boys!
@Mark_Carew_OpenBuild thank you sir. Once I get a good working prototype it and the desktop CNC will be on your builds page! Thanks for the mini eccentrics and C-beam, would not be possible without your amazing products.
@Thomas_Shue yes sir, but all axis are driven by Tr8*8 ACME.
Very nice work!.. I happy to see OB system being perfected. Once you get it set up, I may have to copy it for my personal machine! I cant wait to see this bad boy making parts
So, time to stock up c-beams … 
You finally push me over the edge. Finishing this thing up and take my filthy money
Yeah I am going to order a bunch of C beam exstrusiuons. I wonder is a 12-16mm ball screw will fit in there?
+Peter van der Walt I was looking at the same thing last night 
Just a little too big.
So nice. For dual side gantry like the ox. Would this add quite a bit of cost? Ballscrew isn’t cheap last I checked.
@Dat_Chu they are from here: http://www.aliexpress.com/store/group/Ballscrew-and-shaft-coupler/920371_253896180.html
That’s not bad at all. And it works with c beam. Time for another openbuilds purchase.
@Dat_Chu nope. The nut is too big. It could work if you cut down the flange. See the dimension sheets they have listed.
Sorry gents. No video today. I’m moving around and tuned. Seems my request from my manufacturer for the spindle to be a full 110 package does not include the water pump… Doh!
Guess I’ll be doing a little operation tomorrow and hope I have the right motor laying around.
The gantry is rock solid, movements are nice. I did notice seems the max speed is around the 600mm/min area. Not super stocked about this as I run through woods and plastics on the OX at ~1200. I’ll have to do a little math to get the exact max speed.
A transmission of geared power would be easy, but I would lose torque. If I can trust my motor manufacturer this build may not have speed… But it should be able to power through anything without loosing a step.
I needed a break anyway, got a quad to finish…
If the nut doesn’t fit. What nut did you use @Brandon_Satterfield ?
@Dat_Chu he used the openbuilds leadscrew, not a ballscrew.
@Eclsnowman is correct it is the 8mm pitch lead screw. Working on it in my sleep last night, I think this could create much higher quality curves and circles. 8mm per revolution vs 40mm per revolution… We will see.
Does the Y have Dual Lead Screws?
@Thomas_Shue one per side. I just picked up a small water pump so I’m back to it this morning.
Feeds and speeds calculations are going to fun! I’ve never worked with a spindle capable of these RPMs.
Anticipate I might break a few end mills before lunch.