Hi Roland On Thu, Apr 18, 2019, 3:23 PM Roland Jollivet <[email protected]> wrote:
> On Thu, 18 Apr 2019 at 01:22, Gene Heskett <[email protected]> wrote: > > > On Wednesday 17 April 2019 15:06:02 Chris Albertson wrote: > > > > [...] > > > > > > But if maybe you lock the spindle and turn the nut. > > > > This is the case, except you are turnbing the nut by using the xy > > steppers to drive the carousel which is turning the nut. > > > > > Then your spindle > > > lock needs to have a torque gauge fitted. The gauge is either a > > > spring and switch or a load cell. The switch is much easier to > > > interface with. < > https://lists.sourceforge.net/lists/listinfo/emc-users> > > > > Hi Gene > > To recap; small steppers 'drive' the carousel around to tighten the motor. > Bad idea. > > Here's a different way of looking at it; > Keep the current stepper arrangement, but drive the carousel instead, with > a windscreen wiper motor. > You now have as much torque as you like in the carousel. Add a reduction > drive if you like. If you mount this under the bed you can go to town on > it. > > Gene might include a visual > Gene could give a visual clue with each of these posts. So search ' xatc ' in Google Sorry I can't get this phone to copy the hackaday url ( stupid Newton!) You will see he needs to move the spindle about the carousel center. Not turn the carousel about it's center. ( The design as it is now) That needs an xy move of the carousel center Or an arc motion of the center or some lever motion or ( insert favorite idea here). The process would be to move into tool position, Z down, then either track > the motion of the carousel, or disable the stepper drives and let them > coast as the carousel takes the spindle with it as it loosens/tightens. > Once you've reached your target Amperage on the motor, stop, and Z up. The > X,Y is now a 'don't care', so home the machine. > You then further rotate the carousel to home with a single switch so it's > always ready. > > Regards > Roland > Hth tomp > > > > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
