spring wrap brakes work very well I have no links however ----- Original Message ----- From: "Roland Jollivet" <roland.jolli...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Thursday, March 11, 2010 12:27 Subject: Re: [Emc-users] stepper motor lock mechanism?
Most motor brakes and clutches operate with electromagnet in the axial direction, as discussed. Except you don't have the space... If you mounted a largish, maybe 2x motor OD, lightweight plastic disc on the rear, then you could use any old solenoid to make a brake that either presses against the edge, like you would put your finger on a spinning wheel to stop it, or to pinch the disc against a surface, like an automotive disc brake. Should be cheap to do... Roland On 11 March 2010 05:03, doug metzler <doug.metz...@gmail.com> wrote: > This is the case with me as well - when one of the interlocks is opened I > lose power and the z axis can drop into the work. I don't actually have > to > maintain the exact position so a small amount of movement is tolerable, so > long as the thing doesn't run away - this would allow for a less > sophisticated mechanism, and given how small the stepper is it doesn't > have > to be that robust, but I was hoping for something off-the-shelf. > > I did try shorting the stepper leads together but fully loaded the Z axis > is > sufficiently heavy to cause the stepper to creep. > > Thanks for your continued thoughts. > > DougM > > > On Wed, Mar 10, 2010 at 1:50 PM, Dave <e...@dc9.tzo.com> wrote: > > > True, but usually brakes are only applied to keep things from sliding > > out of position when power is lost. > > > > If you have power to the stepper motor, it should not require a brake. > > > > For instance I have a brake on my X axis on my slant back lathe so when > > power is lost the turret doesn't slide down into the workpiece. > > > > Dave > > > > On 3/10/2010 3:02 PM, yann wrote: > > > Le mercredi 10 mars 2010 20:42:26, Dave a écrit : > > > > > >> You could also just drop a solenoid plunger into sprocket teeth or > > >> something similar. > > >> > > >> Sort of like throwing the proverbial wrench into the works... ;-) > > >> > > >> Nema 17 is pretty small stuff. > > >> > > >> Dave > > >> > > >> > > > problem with that is you will stop only at position determined by the > > number > > > of theeth... > > > > > > > > > this is the device I was thinking about > > > > > > http://www.precisionroller.com/find/4402235600.htm > > > > > > this one looks very expesive, but you could get some used for free > asking > > your > > > local photocopier dealer/repair shop. > > > > > > > > > ------------------------------------------------------------------------------ > > > 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 > > > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
