Janome Quilt Maker Pro 18 VERSA, Service Manual

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Page 13
Figure 4.5
Hook-shaft Timing
Pulley 1
st
screw
Hook-shaft timing pulley
Tools needed: (2.5 mm handle hex tool)
Note: The hook-shaft timing pulley rotates the
opposite direction as the main shaft timing pulley.
Carefully note the labeled first screw (Figure 4.5).
Note: The hook-shaft collar does not have a flat.
The flat is located on the hook-shaft timing pulley
first screw.
Important Hook-Shaft Notes
The hook-shaft turns two times per stitch and rotates
in the opposite direction as the main shaft. Please
carefully note which screw is the first screw in the
direction of motion and on the flat.
The hook-shaft pulley is set to a specific setting from
the end of the shaft to allow proper needle-to-hook
distance adjustment. Adjust the collar to remove axial
play, not the hook-shaft pulley, or the setting can be
thrown off, which may make it so needle-to-hook
distance cannot be adjusted.
The QMP 18 VERSA utilizes long collars with two
screws in line to help prevent the collar from tipping
when tightened, causing variation of tightness or
play, as the collar rotates 360º. To ensure that there
is no tightness or play, the collar should be checked
through a full rotation until it has minimal tightness
and minimal play .
4. Checking and Securing Flats and Screws - Continued
First Screw, First Position Rule
The first screw or first position is almost always*
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. (Figure 4.4)
*
(The pitman screws are only 90 degrees apart
instead of 120 degrees.)
120
o
Position 2
Direction of
Rotation
Position 1
Figure 4.4
Note: First screw in direction of motion goes on the
flat. The first screw is 120º before the 2nd screw. The
2nd screw is then 240 degrees before the 1st screw.