This message is displayed when the Start Button is pressed to begin sewing or a Head Timing Function is performed, but the software detects that the cutting blade is not in it's home position. Sometimes this error will occur if there is an obstruction to the moveable knife. All you need to do is execute the steps described in step 1 of the troubleshooting chart below, and then press the Start Button and proceed where you were.
If you are getting this error frequently, troubleshoot the problem using the steps shown in the table below.
Step |
Action |
Symptom |
Next Action |
1 |
Check for a bind or obstruction of the moveable knife assembly. |
Obstruction found |
Remove the obstruction |
No obstruction |
Go to Step 2 |
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2 |
Verify proper connection of the trimmer motor harness and at the optical sensor PCB located in the cavity of the lower arm. (Access it from the back side by removing the lower arm rear cover.) |
Loose connection |
Secure the connectors. If necessary use cable ties. |
No loose connections |
Go to Step 3 |
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3 |
Inspect the harnesses for bare, broken, or pinched wires, chaffing or other damage. |
Any found |
Replace the trimmer motor harness. |
No damage to wires |
Go to Step 4 |
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4 |
Conduct a "Cutter Function Test" and observe the status of the cutter as provided in the test procedures. |
Status box does not alternate between "Open and Blocked" |
Replace the trimmer motor optical sensor PCB. The sensor is not detecting home. |
Status box alternates back and forth |
Go to Step 5 |
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5 |
Test the optical sensor using the steps prescribed in " Testing Optical Sensors" |
Optical Sensor is dirty |
Attempt to clean it or replace it |
Optical Sensor good |
Contact Melco Technical Support. The Main Control PCB might be defective. |