This example uses a one-variable test to determine whether poor color alignment came from the filament spool or an incorrect toolhead offset on Toolhead #4.
Small projections appeared at several red/yellow boundaries. Select a thumbnail to inspect the original photograph at full size.
Before adjustmentUneven belly edgeRepeated bumps where red and yellow meetSame problem, other sideOpposite belly edgeThe problem could be seen from more than one angleSmall raised partHorn connectionUneven contact where the yellow horn meets the headRear viewSpine and strandsShown as printed, without cleanup
Select any thumbnail to enlarge it. Press Escape or choose Close to return.
Isolate the cause in four steps
1 · Observe
Two possible causes
The defect first appeared on yellow areas. Either the yellow PLA or Toolhead #4 could have caused it. The model was not yet proven responsible.
2 · Isolate
Replace only the filament
An unopened blue SnapSpeed PLA spool replaced yellow in Toolhead #4. The identical test G-code and normal dynamic flow calibration were used again.
One-variable testBlue in Toolhead #4The defect stayed with the same toolheadAfter adjustmentColors aligned correctlyOne complete piece with no loose sections
Select either test image to compare the color boundaries at full size.
3 · Diagnose
The defect followed Toolhead #4
Blue showed similar boundary behavior in the same physical toolhead. This ruled out the yellow spool as the primary cause and identified toolhead alignment as the leading cause.
4 · Correct and Verify
Calibrate, then repeat unchanged
After multi-toolhead offset calibration, the test printed as one intact piece. The four-color dragon then reprinted at excellent quality with only minor cosmetic imperfections.
Result and correction
What happened
What it means
Conclusion
The defect first appeared on yellow areas
Either the filament or Toolhead #4 could be responsible.
Cause unknown
New blue PLA showed the same behavior in Toolhead #4
The defect followed the physical toolhead instead of the color.
Yellow ruled out
The alignment test stayed together after calibration
Color boundaries fused correctly with no loose pieces.
Calibration passed
The four-color dragon was printed again
Clean color registration with only minor cosmetic imperfections.
Printer ready
U1 Toolhead-Offset Calibration
Use the printer touchscreen
Unload all four filaments and clean the nozzle tips. Select Settings > Device Calibration > Multi-toolhead Offset Calibration > Start, then follow the printer instructions.
Reuse the Same G-code
No reslicing is required
The corrected offsets are stored in the U1 firmware. Reusing the identical G-code creates a fair before-and-after comparison.
Good troubleshooting ruleSave the original result and change only one variable at a time. Otherwise, the test cannot show which change solved the problem.
Keep printer problems separate from model reviewsThis was a maintenance issue with SnapCentral’s test printer, not a defect in the Cute Dragon model or its verified print settings.
