APQS Lenni, Руководство по установке

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136 5-2-2021
APQS.com
General Maintenance
Step 3: Check Needle/Hook Clearance
Once the proper hook rotation is set, look at the needle and hook point relationship.
The goal of this step is to get the hook assembly close enough to the needle so that
the hook point touches and slightly deflects the needle as it passes behind the
needle’s scarf. This is very difficult to see with the naked eye; use a magnifying glass
or jeweler’s loupe (found at hardware stores—see the photo at right).
Rotate the fly wheel on the machine back and forth slightly and observe
the hook point and needle scarf.
It can be helpful to shine the flashlight from underneath the machine
for this step, and turning off the LED lights on the machine, if they
aren’t already off. You are watching for the tip of the needle to be
deflected slightly as the hook point passes behind it.
If the hook point does not touch or slightly deflect the needle, you
must move the hook assembly forward on the collar shaft, bringing
the hook closer to the needle.
You can use a screwdriver to gently pry the hook forward WITHOUT
CHANGING THE PROPER HOOK ROTATION THAT WAS SET IN STEP 2! If
the screw on the hook assembly is only slightly tightened in the previous
step, using the screwdriver to move the hook will not require loosening
the screw.
Place the blade of the screwdriver behind the hook on the shaft, in the
air space between the back of the hook assembly and the hook shaft
collar. Twist the handle of the screwdriver to apply pressure to the
hook assembly. Avoid pushing against the machine’s housing with the
screwdriver. Gently force the hook forward until the hook’s point
touches the needle scarf. See the photo at right.
Watch for needle tip to move slightly
when hook point crosses behind the
needle
To move hook closer to needle, use tip of
screwdriver in air gap and turn handle to
force hook closer to needle
Jeweler’s Loupe
with at least 5
times
magnification