Adjusting The Presser Opening Amount - JUKI MEB-3810N Series Instruction Manual

8-4. Adjusting the presser opening amount

❸
❶
❹
❷
A
B
■ Adjustment procedure
[Adjustment of dimension A]
Insert a screwdriver from ❶ to loosen the screw. Dimension A can be adjusted by inserting the screwdriver
into hole ❷ and turning the screw placed at the bottom of the hole. Turning the screwdriver clockwise will
decrease dimension A, or counterclockwise will increase it.
[Adjustment of dimension B]
Insert a screwdriver from ❸ to loosen the screw. Dimension B can be adjusted by inserting the screwdriver
into hole ❹ and turning the screw placed at the bottom of the hole.
Turning the screwdriver clockwise will decrease dimension B, or counterclockwise will increase it.
WARNING :
The confirmation of cloth open amount can be performed by actually cutting cloth in the manual
mode. However, the cloth cutting knife works. So, be careful.
1. In the following cases, set the adjustment value A of the cloth opening amount when the cloth
opener is opened to the standard value or less. At this time, take care to prevent interference
between the related parts.
* In the case the straight bartacking length is set to more than 6 mm;
* In the case the throat plate is lifted above the standard position and the straight bartacking
length is set to longer than 5.5 mm;
* In the case the total of the cloth cutting space, correction value of cutting space, left, and
correction value of needle throwing width exceeds 1.1 mm;
* In the case the throat plate is lifted above the standard position and the total of the cloth
cutting space, correction value of cutting space, left, and correction value of needle throwing
width exceeds 0.9 mm.
2. When sewing is performed using the cut-before knife, the standard cloth opening amount may
be insufficient. Adjust the cloth opening amount according to the material to be sewn so that it
is opened sufficiently.
■ How to check the cloth opening amount
1) Turn the power ON. Press the READY key
to light up the sewing LED.
2) Press the knife ON/OFF key
LED to disable the cloth trimming knife.
3) Press the presser switch and press the +/FORWARD
❶
key
the feed base moves to the sewing start position
and stops there.
❹
4) Press the RESET key
❷
goes up and the cloth opener is closed to return
to its origin.
A
B
− 68 −
. Then, the cloth opener is opened and
The standard adjustment value when the
cloth opener is opened is "A = 2.3 mm".
. Then, the presser foot
1. The standard adjustment value of the
cloth opening amount when the cloth
opener is closed is "B = 3 mm". As a re-
sult, the standard cloth opening amount
is obtained by the formula shown below:
B - A = 0.7 mm
2. In the case the cut-before knife is used
for sewing, in particular, the cloth open-
ing amount should be adjusted accord-
ing to the material to be sewn.
to turn off the