Janome QMP16SU, Руководство пользователя

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11. When the hook point reaches the
far edge of the needle, the hook
point should look like this relative
to the needle eye.
This is the
needle bar height.
There should be 1 mm from the
bottom of the hook point to the
top of the eye.
If steps 8 through 11 above all look good, then the timing is probably set properly and may not need to be
adjusted.
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CAUTION : If you adjust machine timing when it isn’t necessary, it will usually make things worse
instead of better.
If timing does not appear to be out but the machine has sewing issues, the cause is probably something
else. For example improper machine threading or tension settings can cause significant stitching issues.
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IMPORTANT : It is possible, by mis-adjusting the machine, to get the hook point and needle eye to
look correct without turning the handwheel to raise the needle 2.2 mm. However, in this case the
hook will attempt to pick up the loop before it is formed. Without a loop the machine cannot make
a stitch.
“No loop – no stitch.”
If all of the general check and adjustments have been performed and you have determined that the timing
needs adjustment, then proceed with the timing adjustments.
For a machine to be properly timed, three primary settings must be set correctly:
1. Loop lift: the radial position of hook to needle. When properly timed, the hook point passes by the
needle at the correct time and in the proper position. This is the setting that most people refer to when
they talk about timing.
2. Needle distance: the distance between the hook point and the needle scarf. When properly timed, the
hook slightly brushes the inside of the needle scarf. This compensates for the needle being flexed by
the quilt fabric during the stitch cycle and helps to eliminate skipped stitches and shredded thread.
3. Needle height: the vertical position of the needle eye when the hook passes the eye. Normally needle
height does not slip. If the setting is off it is usually due to someone changing it and throwing it off.
Even if the needle hits a ruler or the needle plate, it rarely slips because the needle will break before
the needle height part of timing slips.