Help with this Retraction Mechanism for a Trap

[rama3njoy]

i want make a trap that can reset automaticly.
above my simple drawing how its work, a hinge with lever, the end of lever hold by magnet. every time it swing down, wire attached on the end lever will pulled by motor with half arm.
my question is, how to make switch that trigger motor to turn one rotation? so the trap can reset automaticly.
or any idea to make retract mechanism with mechanical only?
sorry for my English, not my native language

 

[some bloke]

Firstly, what are you trying to trap? Animal traps must be humane or they are both widely illegal and not nice pieces of kit.

To make a motor turn a single turn can be done by using 2 switches to initiate the motor to turn on, and a cam.

if either switch is on, then the motor will rotate.

When the trap is triggered (I'm not sure what your trap is supposed to be trapping, if I'm honest, or what it even does) then this will trigger the first switch, and the motor starts to turn.
The cam would be a round wheel with a dent/recess in the edge. When the motor starts turning, the cam pushes a switch out. This switch remains out for one rotation, and then when the recess comes around again, the switch turns off.
If you design it so that, at this point, the trap is reset and the first switch is off, then the motor will stop.

Look into "the useless box" for a 2 switch system which completes one cycle when a switch is pressed.

 

[rama3njoy]

Firstly, what are you trying to trap? Animal traps must be humane or they are both widely illegal and not nice pieces of kit.

To make a motor turn a single turn can be done by using 2 switches to initiate the motor to turn on, and a cam.

if either switch is on, then the motor will rotate.

When the trap is triggered (I'm not sure what your trap is supposed to be trapping, if I'm honest, or what it even does) then this will trigger the first switch, and the motor starts to turn.
The cam would be a round wheel with a dent/recess in the edge. When the motor starts turning, the cam pushes a switch out. This switch remains out for one rotation, and then when the recess comes around again, the switch turns off.
If you design it so that, at this point, the trap is reset and the first switch is off, then the motor will stop.

Look into "the useless box" for a 2 switch system which completes one cycle when a switch is pressed.

its for mouse trap, just like on shawn woods video (3d print mouse dunk) but with mechanical only.
cam wheel with dent, so its need spring loaded switch?
useless box make sense, will study it now

 

[some bloke]

its for mouse trap, just like on shawn woods video (3d print mouse dunk) but with mechanical only.
cam wheel with dent, so its need spring loaded switch?
useless box make sense, will study it now

yes, you would need a sprung switch to follow the cam.