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The endstop is an extruder movement control tool which is responsible for
sensing the extruder’s position. Each M Series and M Series Plus printer is
equipped with two endstops – one located at the end of the X axis and the other at
the end of the Y axis, both are located in the front corners of the housing. Once
the extruder reaches the end of the axis, the lever of the endstop is pressed with
an endstop sleeve – the element placed on the inner side of the axis block. This
action immediately informs the printer that the extruder should stop moving and
not crash into the housing. Therefore, if the extruder hits a corner of the housing,
and an error message appears on the display (Endstops error #034), at first check
if the endstop cables are properly connected to each endstop. Then, check if the 

endstop sleeves

 are installed on each axis block. If everything seems to be in

order, the endstops need to be replaced. Follow the steps from this manual to see
the correct replacement procedure. This manual shows the Y axis endstop
replacement. The X axis endstop should be replaced likewise.

The following manual shows the M200 repair work. For the M300, M200 Plus and M300
Plus, these procedures are the same.

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