Melco Advantage 18, Руководство по эксплуатации

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Hook Timing
The hook timing adjustment should not change when adjusting the needle depth position, but it
would be a good idea to check it and make sure. Figure 5-26 shows the stitch/cycle relationship.
The hook point is not fully drawn in this illustration, but its position is indicated. In order for the
hook point to catch the loop of thread, it must pass through the needle scarf area approximately
1/8 inch (3.175 mm) above the eye, after the needle rises 3/32 inch (2.38 mm).
Checking Hook Timing
1. Install a new needle to better evaluate the needle/hook point positioning.
2. Remove the table insert, bobbin case, and needle plate.
3. Turn the embroidery peripheral ON and select the Head Timing Menu from the keyboard.
4. Press [ALT][
⇐
] to cycle the head one revolution. The machine will go to headup without
engaging the jump stitch solenoid.
5. Press [ALT][
⇓
] to cycle the head to the full needle down position.
Figure 5-26
Hook Timing 5 - 19
110265-01, Rev. A 5. Operator Maintenance