72 of 289
• If the hook point is not even with the left side of the needle, you will need to perform a hook
timing adjustment.
Needle To Hook Gap Inspection Procedure
13. You can now inspect the needle to hook gap (front to back position of the rotary hook).
The needle to hook gap refers to the gap between the hook point and the needle scarf. To check this
gap, stand on the right side of the machine, then look behind the needle. You should see the hook point
directly behind the needle scarf (it may be helpful to use a magnifying glass to do this). The space be-
tween the needle scarf and the hook point is the needle to hook gap. Use the following image to locate
the gap.
Once you have located the needle to hook gap, you can check the gap width. The width of the gap
should be between 0.004 and 0.012 inches / 0.10 and 0.30mm (approximately 1-3 thread widths). As a
guide, the image above displays the correct needle to hook gap width.
14. If the needle to hook gap or the rotational hook timing are not correct, proceed to the next sec-
tion to perform hook timing adjustment.
To Next Page
Loading...
