To trip the limit switch, the printer simply lowers the z-height until the hotend “probes” the bed, defeating the magnets and breaking the current. Presto! No switches or P.I.N.D.A. probes.

The most common limit switch is the single-pole contact block with one NO and one NC set of contacts; however, switches are available with up to four poles. Limit switches also are available with ...

With the multicolor pen on board, [TUENHIDIY] notes the importance of limit switches in the design. These allow the the ‘bot to make multiple passes, each time in a different color, to build up ...