Homing and Direction Calibration Guide

Movement Direction Correction

Common Issues with CoreXY Structure

Common problems and solutions that may occur with XY motor control in the CoreXY structure:

Fault Phenomenon	Description	Solution
Case 1	XY axis control is swapped, and both XY movement positive/negative directions are reversed	Reverse X motor wiring (swap any two phase wires of the X motor)
Case 2	XY axis control is swapped, but XY movement positive/negative directions are correct	Reverse Y motor wiring (swap any two phase wires of the Y motor)
Case 3	XY axis control is swapped, X positive/negative direction is correct, Y positive/negative direction is reversed	1. Reverse X motor wiring 2. Swap the motor wires of X and Y entirely
Case 4	XY axis control is swapped, X positive/negative direction is reversed, Y positive/negative direction is correct	1. Reverse Y motor wiring 2. Swap the motor wires of X and Y entirely
Case 5	XY axis control is correct, but both XY positive/negative directions are reversed	Reverse both X motor and Y motor wiring simultaneously
Case 6	XY axis control is correct, X positive/negative direction is correct, Y positive/negative direction is reversed	Swap the motor wires of X and Y entirely
Case 7	XY axis control is correct, X positive/negative direction is reversed, Y positive/negative direction is correct	1. Swap the motor wires of X and Y entirely 2. Reverse both X and Y motor wiring simultaneously

Homing Procedure

Step 1: Check Initial Endstop Status

1. Safe Movement: Manually and slowly move the printhead to the center area of the heatbed.
2. Query Endstop Status: Enter the following command in the console:

   QUERY_ENDSTOPS

3. Query Probe Status (if installed):

   QUERY_PROBE

4. Check Return Results:
   • ✅ Normal Status: All endstops should show OPEN (not triggered)
   • ⚠️ Abnormal Status: If TRIGGERED is displayed, it means the endstop is triggered.
     • Note: If an abnormality is found, do not modify the configuration; proceed to Step 2 for verification.

Step 2: Manual Trigger Verification

1. Manual Operation: Manually and continuously trigger a specific endstop switch.
2. Query Again: Enter QUERY_ENDSTOPS again in the console.
3. Status Analysis:

Status Change	Meaning	Solution
OPEN → TRIGGERED	Endstop configuration is correct	Switch and wiring are normal, configuration is correct
TRIGGERED → OPEN	Endstop signal is inverted	Need to invert the endstop state (modify in configuration)
No status change	Endstop not responding	Check pin configuration, wiring, or replace the switch
Other endstop status changes	False triggering	Check for pin configuration conflicts or wiring errors

Force Move Function

Enable Force Move

1. Configuration File Modification: Add the following configuration to printer.cfg:

   [force_move]
   enable_force_move: true

2. Interface Operation: After enabling, force move operations can be performed via the control interface:

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Precautions

• Single Axis Limitation: Only one motor can be force-moved at a time, even if the machine has a multi-axis structure.

• Multi-axis Coordination: To move multiple axes synchronously (e.g., dual Z axes), first set the printhead position:

  SET_KINEMATIC_POSITION x=50 y=50 z=20

  Then execute the movement command.

• Safety Reminder: When using the force move function, ensure the printhead path is clear of obstacles to avoid collisions.