> On Nov 22, 2023, at 1:06 PM, gene heskett <ghesk...@shentel.net> wrote: >> > I'd have to agree Andy. I need to design a disk brake for my A axis as > there's half a degree of slop in the worm drive which if it gets to the motor > will be held, but the slop in the worm makes for sloppy looking holes, but > the activation method is still in my head. Even that is only important when > drilling a hole for the handle. I'll come up with something.
Would a simple disk brake work? I think it might clamp the part any place within that 1/2 degree of slop range. Ideally, you would have an index plate and some way to place a pin in a hole to lock the table. But you could only have a few holes and not enough holes for one at every place you might want to stop. What if the disk had “V” slots cut in the edge. Like a very large US Quarter Dollar, but with maybe 360 grooves. Then you could wedge a shape (like a tiny axe head?) into the slot and force the disk to stop on an even degree. You could use more than one wedge, space them around the disk. A wedge would need a lot less clamp force than a brake disk pad because it is a mechanical lock almost like an index pin If you still want a “disk brake” why not use an actual disk brake from a bicycle? They are about the right size, have huge holding power, and don’t cost all that much. The ones you would want to use are hydraulic so the electric actuator could be a couple feet from the rotating table. They still make cheaper ones that use cable but avoid those, they are too hard to adjust. Or maybe both, Use the slot and wedge to aligh the table to the nearest degree and then clamp it with a hydraulic disk brake. Cost is under $100. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
