JUKI lbh-1790 series Engineer's Manual page 11

Adjustment Procedures
1. Adjust the position of feed motor installing plate 6 so that the
lengthwise feed timing belt tension is applied with 70 to 80N.
2. Temporarily tighten three setscrews 5 in feed motor installing
plate 6 and adjust the timing belt tension by taking adjusting
screw 1 in ond out.
(Caution)
1. Be careful that timing belt 3 is not drwan up to one
direction when feed base 2 is moved back and forth
several times.
2. Be careful that the cord of feed sensor 7 does not come
in contact with timing belt 3.
3. Fix feed motor installing plate 6 so that feed follower
shaft 4 is parallel to the lengthwise feed motor shaft.
Adjustment Procedures
1. Loosen the setscrews, and remove work clamp carrier 2 and
throat plate base cover 3.
2. Adjust the logitudinal and lateral positions at the installing
position of throat plate base 1 and the direction of rotation at
the installing position of knife bar base 4.
(Caution) When the installing position of throat plate base 1
is adjusted, check the bobbin thread trimmer.
Results of Improper Adjustment
™ When the belt tension is low,
correct lengthwise feed pitch
may not be obtained, or tooth-
skipping of belt may occur.
Results of Improper Adjustment
™ When the position is improper,
the blade of cloth cutting knife
will wear out earlier.
6
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