I am trying to emulate the resistance of a hand wheel which moves a table via a series of shafts and chains which turn an acme screw. I am switching to a CNC system that will allow the user to keep the old style crank for manual positioning. The crank will instead attach to an encoder which will command the CNC system.
My problem is encoders don't have shaft resistance or enough resistance. What I am looking for is a method to produce shaft resistance that feels sticky. You could quickly accelerate it but you have to put a bit of effort behind the motion and the crank would stop dead and hold its position when let go. I tried searching for such a device but perhaps I am searching for the wrong terms. In my head I picture one or more slotted discs sealed in a housing filled with a very viscous or sticky liquid. The only thing that comes close is a viscous shaft coupling. But they are couplers. I need a through bore or keyway whose housing can be mounted to a frame.