Today I played around with mounting a gear on the rear shaft and having a simple spring-driven solenoid simply release a pin into the teeth of the gear. That will work, but does have some complexity with regards the surrounding extrusion. I like the string idea - it's ingenious in its simplicity, I will play around with that as well. The only issue I see to that is the manufacturing complexity, unless I could somehow package it into an attachable unit.
Keep 'em coming! Thanks, DougM On Thu, Mar 11, 2010 at 7:09 PM, cogoman <cogo...@verizon.net> wrote: > I apologize. I just sent this one, but forgot to paste the proper > subject in, so this time it's correct. > > If space is at a premium near the motor, and the torque requirement is > light, you could use a string (some durable cord) tethered off to one > side of the shaft, wrapped around the shaft once or twice, then draped > over a pulley or two to get to someplace where you could mount a spring > and a solenoid. The spring (or a weight) would provide tension to hold > the shaft in place, and the solenoid would counteract that to release > tension when the stepper was energized. If your Z axis doesn't move a > lot (2d or 2.5d usage mostly) then good cord should last a long time. > Could possibly be done with guitar string, and if more holding torque > were needed, adding a disk to increase the diameter of the shaft where > the string wraps around could make it lock better. > > Just my 2c. > > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
