Parallel Of Needles - Yamato AZ7000SDR-8 Instruction Manual

6.9.4 Parallel of needles

In the case of 2-needle machines, loosen the screw ④ of
the lower looper holder arm and turn the adjusting screw
⑤ clockwise or counterclockwise to adjust the back and
forth position of the lower looper so that the clearance
between the left needle and lower looper is set to between
0 to 0.05 mm when the lower looper has arrived at the
center of the left needle. Then, tighten screw ④ slightly.
Loosen screw ①, turn the needle clamp slightly, and ad-
just it so that the clearances between the right and the
needle on the left are the same. As with the left needle,
adjust the clearance to between 0 to 0.05 mm when the
right needle and lower looper meet.
1. After checking the needle heights, tighten screw ①
of the needle bar bracket. Refer to "6.9.1 Height of
needle" on page 29.
2. Once the parallelism adjustment has been conducted
for the needles, be sure to adjust the back and forth
position of the looper.
3. Once the back and forth position of the lower looper
has been adjusted, check the distance between the
needle and the lower looper, then tighten screw ④ in
Fig. 6-25.
4. Apply the liquid packing to the thread of the screw
when tightening it.
6.Adjustment of sewing machine
Fig. 6-23
Fig. 6-24
③
②
Fig. 6-25
31
0 -
0.05 ㎜
needles
②
①
0 - 0.05 ㎜
⑤
④
AZ7000SDR-8, 7500SDR-8