Does it have to be two function i.e brake - push or does it need to produce a constant force? Constant force can be very easily achieved with a torque mode servo drive or even a simple constant current circuit driving a motor.
Les Sven Wesley wrote: > Sorry guys for using the list for something not really related to EMC, but I > do know here are a lot of people with the knowledge I need. > > It was long time ago I designed something with electronics, so I hope > someone can help me. > What I need is an electric braker-pusher. It will not need to come to an > absolute stop, it should just add or release resistance on a rolling device. > It's very much like the electric braker on a bicycle trainer, but with the > option to give energy too. > > A little spec would be: > A small motor, maybe 12 V and 30 W. Not sure how much needed yet. > Should take a value, for example -100 to +100 from a computer, controlling > the output. Minus values for braking and positive for pushing. > Returns RPM from a magnet switch. > > The motor will always be rotated, even when braking at maximum, some kind of > heat sink is definitely needed. > I would say that the circuit is something like a servo controller board but > a lot more primitive, no positioning or extras, just burning or giving > energy. > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
