Adjusting The Thread Tension; Intermediate Presser Height - JUKI AMS-210EN-7450 Instruction Manual

4-7. Adjusting the thread tension

Shorter
3
Increase
1. Thread tension disc felt is a consumable part.
When rotary disc slips, there is a possibility that the thread tension disc felt has been
consumed. Replace the felt with new one (Part No. : 22528509 x 2 pcs.).
Refer to "#-1-14. Amount of oil supplied to the hook".
2. Wet or soiled felt in the thread tension controller No. 2 asm. can cause stitching failure.
If the thread tension controller felt gets wet or soiled, it should be replaced with a new
one as in the case described in 1.
3. If the needle thread tension is not high enough to produce well-tensed seams when em-
broidering a heavy-weight material or several plies of materials (a sewing trouble where
the bobbin thread tension is excessively higher than the needle thread tension), the
existing thread tension spring should be replaced with optional thread tension spring
(B3129012A00).

4-8. Intermediate presser height

1. When raising the intermediate presser height, turn the pulley by hand to lower the needle
bar, and confi rm that the needle bar does not interfere with the intermediate presser.
2. Take care not to get your hands and fi ngers caught in the feeding frame or intermediate
presser.
A
1
Longer
Decrease
Press INTERMEDIATE PRESSER SETTING button A and ad-
just with TEN keys B so that the clearance between the bottom
end of intermediate presser and the cloth is 0.5 mm (thickness
of thread used).
In the case the thread fl oats above the material during sewing,
adjust the height of the intermediate presser higher than usual.
Be aware that stitch skipping can be caused if intermediate
presser height is excessive.
Set value of the intermediate presser height is used by the sew-
B
ing machines as a common value. (The set value specifi c to a
sewing pattern becomes invalid.) In the case the intermediate
presser is set on a pattern-by-pattern basis, disable the setting
of service level K135. (Refer to the Engineer's Manual or con-
tact the distributor for detailed explanation of setting.)
If thread tension controller No. 1 1 is turned
clockwise, the length of remaining thread on the
needle after thread trimming will be shorter. If it is
turned counterclockwise, the length will be longer.
Shorten the length to an extent that the thread is
2
not slipped off.
Adjust needle thread tension from the operation
panel and bobbin thread tension with 2 .
Turn thread tension controller No. 2 3 clockwise
to increase the thread tension, or counterclock-
wise to decrease it. Be aware that the same fault
as in the case of the thread tension controller No.
1 can occur depending on the degree of thread
tension.
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