This device employs a standard miniature limit switch on a breakout board with a detachable JST connection cable.
Once the 3D printer reaches the end of the shaft as the motor slides down, the limit switch pushes up against the casing barrier and stops its motion.
This is how the 3D printer knows when to stop and reverse direction in its plain.
Alternate applications include autonomous robot guidance.
· 3 pin JST to female connector
· 1.57in x 0.63in (4cm x 1.6cm x 0.9cm)