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Hi this motion is typical for unconnected Endstop. The switch shall open on touch and close at movement in buildplace. because the endstop pin on the controllter is pulled up and the switch connect to ground, a not connected switch let the pin open on High and the Firmeware detect this and stops all motin and the homing process.
possible resons:

  • not or wrong connencted wire
  • switch in correct wired so it close on touch (you may check this by closing the switch manualy and switch the printer suddenly of if it reaches the endstop)
  • broken wire.
  • switch defect.
  • firmware not correct confirured ( missing pullup or inverted logic )

CHECK :
mesure logical high between switch pins if it is pushed.
mesure logical low between switch pins if it is NOT pushed.

if this is given, the FW is incorrect configured.
if it is reverse, the wrong pins on the switch are used change them till it is as described.
else the connection is incorrect or open. Check the wire and connection.