I'm trying to come up with an engage/disengage mechanism for my stepper motor. It will be connected to something that I'd like to be able to move manually as well, and since it's a geared stepper motor with high gear ratios, it would be very hard/impossible to move it manually, therefore I'm trying to think of a mechanism that will allow me to engage/disengage the motor from the assembly.
I tried to look at various solutions, but still couldn't find something that will work for me. I'm using a pretty small stepper motor(under miniature stepper motors category), and the application needs to remain small, so big additions would not work out for me due to lack of space.
I tried to look at electromagnetic clutches, but they are extremely expensive and rather big, so that would not work. I was able to think of 1 possible solution, but I don't know how to achieve that: Basically, if I'll have a stepper motor where the shaft is not centered, I could perhaps by rotating the motor on its axis engage/disengage the motor from another gear part. The issue for me is that I'm using a centered geared stepper motor, so I'm not sure how I could achieve that offset, I searched for some gears that will allow me that, but couldn't find any.
I own a 3D printer, so I can generally print whatever I need, but I'm not sure I'd want to print gears etc, as they could wear quite easily, so I'd rather avoid that.
Any suggestions would be much appreciated. Thanks.
Edit - Basically, I'm trying to replicate this mechanism: youtu.be/TN5hnE2UnbU?t=287