I am raising a cardboard cylinder with thread attached to a reel driven by a small motor. I need to have the motor cut off when cylinder reaches desired height. Stepper motor to slow. So I thought some type of switch thrown by the cylinder at the desired height. Some sort of contact switch? Looking for as simple a design as possible. At the worst bare wires touching?
At least a drawing?
Hi @gpoley ,
the appropriate solution may depend on the speed of the cylinder and the distance available for braking ...
Reed relay, with a travelling magnet to operate it?
The usual solution on a winch is to run the cable through a hinged loop of some kind, have a big lump on the cable where it is desired for it to stop, so the loop lifts up when the lump on the winch cable reaches it and have that operate a micro-switch as per @van_der_decken 's suggestion.
Both this and microswitch with lever seem feasible. Thanks for idea
So I can use an always on reed switch that is turned off by the Magnet. To go down would activate other side of controller to reverse direction and have it turn of at bottom with another similar reed switch? BTW talking cardboard stuff so pretty light weight
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