How about an eddy current brake that uses a thick copper washer, a disk with some strong magnets, and use a small air cylinder to push the copper washer away from the magnets and springs to pull or push it close to the magnets when the air is cut off so the wrench stops fast.
Automatic brake release and fail safe engagement, but zero contact so there's nothing to wear out or jam up. On Sunday, November 21, 2021, 07:57:34 AM MST, Gene Heskett <ghesk...@shentel.net> wrote: Close to the truth, However there might be a salvation in a viscous greased disk that would absorb the rapid spin, trapped between two other disks. It would allow the initial slow unlocking but seriously impede the following rapid spin. Or an eddy currant brake but that would take burn it up power so it would need to be applied only when the air is applied, and possibly for half a second after the air valve was turned off. I like the suicide braking idea, but there is limited space and it needs more diameter than you have room for. A coil spring anchored to the tool that would allow maybe three turns of the socket before winding tight against the socket OD might be a softer stop. Or a pile of interlocking disks that were screw driven like the rear brakes on an old Schwinn bicycle? That was fairly compact and lasted close to forever. Just tossing out ideas to see if one sticks. Cheers, Gene Heskett. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
