Hey all, we’re still working on some official documentation on using the rotary on our new EX controllers.
For now I have created a “rotary crash course” for you to check out:
This will show you start to finish how to setup and calibrate your rotary on an EX control
Thanks for doing this Eric. This is very helpful.
Glad I “winged” it and did it right 
Thanks for the video. Was pretty straight forward after we got it working.
@Eric probably should put this in another thread, but with the servo what is the max RPM configured to for the rotary axis?
Don’t hold me to this, but at max speed on the rack drive (so your X or Y axis) it spins at 600 RPM to go 1000 IPM, so on a 10:1 gear reduction for the rotary you’re looking at 60 RPM.
Again, don’t hold me to that!
Also, think about surface speed too, that changes depending on how far away you are from the centerline of your stock.
Nice! That rotary calibration is our longest single macro by far. Hopefully in the future we’ll make it a little more “graphical” but I’m glad you got through it.
I thought I saw there was a straight line torque on the servos to about 2600 RPM, then it dropped off, I think on the website with the NEMA 34 motors it said it was 100RPM. I figured I should be able to push it through the constant torque line of the servo motor so at least to 260RPM, but not sure where that setting was. Just trying to chew through things as fast and safe as possible without breaking something. As they say time is money.
I’ll find out more tomorrow for you
Nice video.
So in the rotary mode, MTC will not go over to the toolsetter, it will have you jog over to the touchplate on the tailstock so it can probe there instead, correct?
That’s correct because we have no way of knowing where that touch plate is. You have to jog there so we know.
Thats what I thought, I just wanted to verify.
I like the angle adjustment it does for any error down the rotary horizontal plane. Would be cool if it could do that on the height too, but I don’t think there is a built in feature to use for that in CNC12 like there is for rotation angle, right?
There is, but it can’t bend the laws of physics: There’s no A/B axis to tilt to compensate. We want the end mill to be as parallel as possible to the rotary, hence why it’s on you to use those jack screws to level it out.
Ya, you wouldn’t want to use it for a gross tilt, but it would be nice for that last couple of thousandths of tilt over the full length so that you can remove/replace the rotary unit with out messing with the jackscrews. I have done a lot of work shimming and pinning mine so that it goes back into the same place, but I think most people are using the stock jackscrews. Just a thought, not a big problem for sure.
Would volumetric compensation do what you’re asking @jjneeb ? Basically a way to remove taper?
It’s a beta feature right now but Centroid is working on it.
Not really. You can’t compensate for a flat end mill not being parallel with the rotary. If you could we would have done it 
Ah yes! I didn’t think of that. When I’ve used this (once), I was using a ball end mill to make a dowel. It turned out great, but I can see the flaw in the logic here.
Ya, that would be the one application that VC would work as long as you were just using the tip and not the cutter side.