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Needle Depth
The needle depth should be set after any of the following:
• replacement of any of the needle bars or needlecase assembly four-packs
• disassembly of the needlecase assembly
• when diagnostic tests determine resetting of needle depth is necessary
To set the needle depth, the software must be launched and the machine must be turned on. Refer to
the following procedures to set the needle depth.
Setting the Needle Depth by Eye
1. Click the Maintenance menu on the Bravo OS main menu screen,
and then click the Head Timing tab to open up the Head Timing
menu.
2. Remove the bobbin case and bobbin (if installed) and then click the
Head Up button and then color change left to Needle 1.
3. Click on the Bottom Center button.
4. Look directly into the hook assembly and check the location of
the needle’s eye compared to the figure above. 1/4 - 1/2 of the
through portion (the portion that you can see through) of the
needle eye should be visible in the hook assembly. If the needle’s
eye is in the acceptable range, skip the next few steps and go to
Step 7. If the needle’s eye is not in the acceptable range, contin-
ue this procedure with the next step.
5. Loosen the set screw on the needle bar drive stud and move the
needle bar up or down until needle depth is correct. (1/4 - 1/2
of the needle eye through portion should be visible) Repeat step
4 above and repeat this step again if the needle depth is not
correct.
6. Click the Head Up button and then the Bottom Center button
and check that the needle is at the proper needle depth position.
If it is not, go to step 5 above.
7. Click on Head Up. Color change to the next color.
8. Repeat steps 3 through 7 until needle depth is set on all 16 needles.
9. Reinstall the bobbin and bobbin case.
10. Run the following test designs on the machine:
• AMTBTESTXXX.EXP (Thread Break Test)
• AMRTESTXXX.EXP (Looping Test)
Figure 1 - Head Timing Menu
Figure 2 - Needle Depth
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