What's the load capacity on one of these running the nema 23? I'm just looking for a ballpark number. If I'm using the calculator over at daycounter correctly, they can easily do a couple hundred lbs?

 

Hi

I think will use this type of linear actuator to build my CNC, I just think change some parts :
- change the "Nut Block for 8mm Metric Acme Lead Screw" with "Anti-Backlash Nut Block for 8mm Metric Acme Lead Screw"
- change the "1/4" x 8mm Flexible Coupling" with "5mm * 8mm Flexible Coupling"
- change one of the "C-Beam™ End Mount" with "Threaded Rod Plate™ for Nema 23 Stepper Motor"
do you think, like me, it's going to improve performance ?

Thanks for answers

 

Thanks for replay
OK, I haven't yet buy nema motors, I referred to this GREAT project for using 5mm* 8mm flexible.
I want ask about the best solution. (edit : BIG mistake ... the referred project use nema17 for Z axis .. sorry )
Now, when I see the picture below I think reback for using 1/4"*8mm flexible
just ask about best solution. (edit : 1/4" * 8mm flexible )



About the second, using "Threaded Rod Plate™ for Nema 23 Stepper Motor" imply using 3 screws to attach nema23 motor, this imply best performance ... no ?
ask about best solution here too

Thanks

 

OK, I keep only the first change
Thanks

 

Just assembling a CBeam actuator which actually came with the anti backlash nut rather than the one in the video. Having some slight difficulty with fitting it to the gantry plate though. The spacers in the kit are 9.6mm OD and 4.15mm thick. The anti backlash nut has pockets milled which are 9.8mm diameter. The spacers obviously don't fit in the pockets but then they don't fit outside them either as not enough material.

Have I got the wrong spacers? Frustrated if I have as only just got going on the build as I had to wait for other incorrect part to arrive.

 

With Standard End Plates, is there enough in the way of clearances to allow me to modify them so that I can run 16mm Ballscrews?
A CAD file would also be very helpful as I haven't yet figured out how to open them in Sketchup.

 

New to the site and a bit late to the party, obviously, but for anyone who's still looking for CAD files, here's a DWG export of the SU model for the 250. I'm also including my cross-section region for the the C Beam profile (sized in inches, so scale by 25.4 if you're working in metric), from which you can extrude your own custom length. And I'm throwing in my drawing of all 4 V-Slot profiles (metric) for good measure.

It should be noted that I created all the additional profiles by taking the 2020 V-Slot DXF I found and doing a bit of editing, eyeballing the differences in internal structure, so they may not be exactly perfect, but they do seem to be close enough, certainly at least for concept modelling. Hopefully they'll help someone get started!

 

Wonder if it is possible to replace X-axis of my OX-CNC with a C-Beam, if so, can you guys point me where i can order the needed parts?

 

Hello,

Has anyone ever tried to change the Acme 8mm leadscrew for a bigger one ? A 10mm or 1/2" one ? If so, can you describe how you did it ?

Thank you!

 

I investigated switching to a 10 mm Ballscrew for a Z-Axis and it would've involved having the Ballscrew machined down on the Ends to 8 mm. The problem with this though is that I couldn't find a Ballscrew Nut that would fit within the confines of the C-Beam Extrusions.

 

Okay, too bad. Thank you for your reply !

 

Why not just use a 10x16x5 ball bearing instead?

10x16 Bearing 10x16x5 Open

As for the Ballscrew Nut, why wouldn't something like this work?

High Reliablity 10mm Ballscrew With Single Nut - Buy 10mm Ballscrew,High Reliablity 10mm Ballscrew,10mm Ballscrew With Single Nut Product on Alibaba.com

 

Hi,

We just built one of these C-beam 500mm linear actuators and noticed that the Anti-Backlash Nut was surprisingly tight over the lead screw. The Anti-Backlash Nut feels tighter than expected even when we tested screwing it into the lead screw as a stand-alone pair--just the screw and the nut. Our fingers hurt and it seems way tighter than what can be perceived in the assembly video. We checked the grub screw and it was not engaged.

Is this normal with the new nuts? I worry it is not and it will overstress and overheat the motor and ultimately sink some of the torque that would otherwise become a force in the actuator. If it is not normal, can we get a replacement shipped?

 

What @Rick 2.0 said + if it's still stiff clamp it in the chuck of a battery drill and run it back and forth a few times. New nuts are often/usually stiff.
Alex.

 

Thanks @Rick 2.0 and @Alex Chambers! I just ordered DuPont Teflon Silicone Lubricant Aerosol Spray, 14 oz. This should lubricate the lead screw and I will also run it back and forth a few times once I add the spray.

 

How much does this weigh?