Click torque washer/knob for stepper motor

Hi I'm trying to create a simple rocker with a stepper motor rotating +/- 45 degrees every interval but need the stepper to be able to work like a click torque wrench so that if the platform being rotated is stopped by force for whatever reason, the stepper motor just rotates freely within a washer sort of interface with the platform like a click torque wrench. I was wondering whether there is already some sort of adapter that can be purchased that does this or if anyone had better ways of facilitating this

Many thanks

Turn down the current to a level where the stepper stalls at a certain obstacle torqe.
I0use a torque sensing device to allow the controller to abort operation at obstacle torque.
Use sensing devices, touch detecting....

There are a number of project that do things similar to this. Search for Arduino haptic devices.

Thanks all v helpful

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