Should any movement try to exceed the physical limits of the machine, the endstop will cut the movement.

Illustration 1: LCD indication not homed axes (Marlin Safety The other important aspect of an endstop is protecting the hardware from damage. Homing can be initiated either via the G28 G-code or via the LCD controller. This means the system needs first to establish its starting point of the physical (machine) coordinate system, a process called Homing. Marlin indicates this by blinking question-marks in place of X, Y and Z on the LCD screen (v1.1.8 and older) or blinking in place of the coordinates besides X,Y and Z (Marlin v1.1.9 v2.0.0 and newer). Reference for the axes system After powering up a 3D printer the printers controller board does not know at which position its axes are. The following chapter will provide information on: Purpose of the endstop Types of endstops Configuring endstops and probes Electromagnetic Interference Electric Noise impact on endstops Endstops purpose Endstops fulfill two important functions in a 3D printer: Reference system for the axes system and safety. Having the trigger point below the bed makes little sense as the nozzle would crash into the bed before the microswitch triggered on homing. It is possible however to use a microswitch trigger point above the bed by setting MANUALZHOMEPOS to the z-coordinate of the trigger point. Unfortunately, from the TFT screen and disconnecting the cable from the computer, my drawbot does not run over the limit switches. Niestety z ekranu TFT i odczeniu kabla od komputera, Mj drawbot nie wjeda na wyczniki kracowe. Mks Dlc V2.0 Endstop Software Endstops Should.Mks Dlc V2.0 Endstop Code Driven Spindle.

Mks dlc v2.0 endstop