Inspect probe mounting, deployment, wiring, nozzle cleanliness, bed surface, offsets, and firmware configuration before repeating a homing or mesh cycle.
Start hereInspect probe mounting, deployment, wiring, nozzle cleanliness, bed surface, offsets, and firmware configuration before repeating a homing or mesh cycle.
First safe actionRun the first safe check and change one variable at a time.
Proof targetA small representative test no longer shows the original symptom.
Match the failed area to the visual before changing a setting.
Repair progress0 of 8 complete
Step 1 of 8
Stop the machine if the nozzle approaches the bed without a valid trigger.
Keep the problem and target visual open while you make this change.
Why this matters
The pin or sensor cannot move consistently.
Setting or checkProbe offsets
Use measured physical values and preserve the correct sign convention.
Expected result
The original symptom no longer appears during a representative calibration or short test print.
Step 2 of 8
Clean the nozzle and bed, then inspect the probe body and mount.
Keep the problem and target visual open while you make this change.
Why this matters
The probe height changes during measurement.
Setting or checkMesh density
More points do not fix an inconsistent probe.
Expected result
Measurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Step 3 of 8
Confirm the probe is rigid and the pin or sensing face is unobstructed.
Keep the problem and target visual open while you make this change.
Why this matters
The signal drops as the toolhead moves.
Setting or checkProbe speed
Slow slightly only after mechanical and electrical checks.
Expected result
No new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Step 4 of 8
Check the harness and connector through full toolhead travel.
Keep the problem and target visual open while you make this change.
Why this matters
The controller expects different geometry or logic.
Setting or checkProbe offsets
Use measured physical values and preserve the correct sign convention.
Expected result
The successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Step 5 of 8
Run the probe self-test or state display if available.
Keep the problem and target visual open while you make this change.
Why this matters
Material on the nozzle changes the measured reference.
Setting or checkMesh density
More points do not fix an inconsistent probe.
Expected result
The original symptom no longer appears during a representative calibration or short test print.
Step 6 of 8
Verify X, Y, and Z offsets against the machine configuration.
Keep the problem and target visual open while you make this change.
Why this matters
The pin or sensor cannot move consistently.
Setting or checkProbe speed
Slow slightly only after mechanical and electrical checks.
Expected result
Measurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Step 7 of 8
Repeat several measurements at one point and compare consistency.
Keep the problem and target visual open while you make this change.
Why this matters
The probe height changes during measurement.
Setting or checkProbe offsets
Use measured physical values and preserve the correct sign convention.
Expected result
No new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Step 8 of 8
Rebuild and save the mesh only after repeatability is acceptable.
Keep the problem and target visual open while you make this change.
Why this matters
The signal drops as the toolhead moves.
Setting or checkMesh density
More points do not fix an inconsistent probe.
Expected result
The successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Controlled test log
Change one variable, then record what happened
This keeps temperature, retraction, speed, mechanical, and material tests from blending together. The history stays private in this browser.
Bed Leveling & ProbesBLTouch or CR Touch Deploy and Alarm Error
Bed Leveling & ProbesBed Mesh Not Applied or First Layer Ignores Leveling
CalibrationBed Leveling and Z Offset Guide
