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11
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Adjustment Procedures
Results of Improper Adjustment
1. Tighten the setscrews so that the distance from the presser to
the needle hole is 2.5 mm and so that the feed shaft protrudes
by 5 mm from the feed shaft bushing.
(Caution) When tightening the setscrews, turn the feed shaft
and tighten the setscrews in the center of the
backlash in the rotating direction so that the feed
stepping motor gear and the feed shaft gear do
not produce the end tooth bearing.
2. When the feed origin is detected, adjust the distance from
the presser to the needle hole to 2.5
±
0.3 mm, and fix the
position of the sensor installing plate with the sensor installing
plate setscrews.
™
How to check
• Pressing the right
key, turn ON the power to set the test
mode. (Refer to page 73.)
• Select No. 1 with the left
or
key. (Input check)
• Detection of the sensor can be checked by turning ON or
OFF of the leftmost LED of the right 4-digit LED.
™
Origin compensation procedure by means of the panel (Refer
to page 47.)
• Pressing the right
key, turn ON the power. Compensate
the feed position with the origin compensation mode No. 51
Adjust the position at the installing position of the throat plate
base.
Throat plate
Throat plate base
™
If the position of the presser is
improper (longitudinal position of
the work clamp is also improper),
opening/closing of the needle
thread trimmer will be affected.
™
When the feed origin is detected, if
the distance from the needle hole
to the presser is excessively narrow,
the presser comes in contact with
the needle at the overlapped section
resulting in thread breakage or
needle breakage.
™
Improper position of the feed shaft
is related to the maladjustment of
the bobbin thread trimmer driving
cam resulting in defective bobbin
thread winding.
Summary of Contents for LBH-1700
Page 1: ...R ENGINEER S MANUAL 29339504 No 04 Electronic Buttonholing Machine LBH 1700 Series ...
Page 55: ... 51 MEMO ...
Page 124: ... 120 ...