Cautions In Operation - JUKI LK-1900S-SS Instruction Manual

6-7. Cautions in operation

(1) When the error indicator lamp lights up, be sure to check the cause of trouble and take a proper correc-
tive measure.
(2) Do not draw, by hand, the material being sewn during sewing. Doing so will cause the needle shift from
the correct position. If the needle moves from the correct position, press READY key
This will return the needle to the normal origin.
(3) Do not turn OFF the power in a state that the needle is lowered. The presser comes down and the wiper
interferes with needle. As a result, there is a danger of needle breakage or the like.
Reference for the sewing speed to be applied
Sewn product / thread / needle
8-layered denim / Cotton thread #50 / DP×5 #16
8-layered denim / Cotton thread #20 / DP×17 #19
Overlapped sewing of 6×12-layered denim / Cotton thread #20 /
DP×17 #19
8-layered woolen gabardine / Polyester filament #50 / DP×5 #14
* To prevent the thread breakage due to the needle heat, set the sewing speed referring to the above
table in accordance with the sewing conditions.
S (Standard) / 2,700 sti/min
H (Heavy-weight material) / 2,700 sti/
min
H (Heavy-weight material) / 2,500 sti/
min
S (Standard) / 2,300 sti/min
－ －
42
two times.
Head type / Sewing speed