QMP16SU Service Manual
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First Screw, First Position Rule
The first screw or first position is usually located
120° apart in the direction of rotation from the
second screw, or second position. The first screw
in direction of rotation goes on the flat. This is an
assembly rule.
The first screw in direction of motion goes on the
flat. The first screw is 1200 before the second screw.
The second screw is then 2400 before the first
screw.
Check #4: Main Shaft Timing Pulley
Adjust if necessary
Tool: 2.5 mm handle hex wrench
• Make sure the first screw has been fixed
firmly on the flat.
First screw Main
Shaft Timing
Pulley on flat
Flat
Check #5:
Hook-Shaft Timing Pulley
Adjust if necessary
Tool: 2.5 mm handle hex wrench
The hook-shaft timing pulley rotates the
opposite direction as the main shaft timing
pulley. Carefully note the first screw labeled
in the image.
The hook-shaft collar does not need a flat.
The hook shaft has a flat for the hook-shaft
timing pulley first screw.
First Screw
Hook-shaft Timing Pulley First Screw
Important Hook-Shaft Notes
The hook-shaft turns two times per stitch and rotates in the opposite direction from the main shaft.
Carefully note which screw is the first screw in the direction of motion and on the flat.
Position 2
Position 1
120
0
Direction of rotation
Note: Always fully tighten the screw
on the flat first.
Содержание QMP16SU
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