Endstop
RepRap's Cartesian axes all need a datum (also known as home position or end-stop) to reference their movements. At the start of each build each axis needs to back up until the datum point is reached. The switches also help protect the machine from moving past its intended range and damaging itself.
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Mechanical
Mechanical Endstops are the most basic form of Endstops, made of an ordinary switch, two wires. Changing the switch state signals the electronics.
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| Examples of a simple mechanical endstop and an adjustable one on the Z axis. | |
Optical
These Optical Enstops observe the lightlevel and reacts to sudden changes.
E.g: Gen7 Endstop and Opto Endstop.
Magnetic
These endstops; Hall effect sensors is a transducer that varies its output voltage in response to a magnetic field. Hall effect sensors are used for proximity switching, positioning, speed detection, and current sensing applications.(--Wikipedia)
E. g: Hall-Θ.
