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8. MAINTENANCE
CAUTION
(1) Please make sure to turn the power switch off before cleaning the sewing machine.
(2) Please pay attention to that staining your skin or eyes with oil may cause an inflammation.
8-1. Cleaning
(1) Remove the dust and the thread waste sticking the threading parts or the hooks area regularly.
(2) The dust or the like sticking the X-Y slide guide absorbs
lubrication oil on the rails and significantly lowers the slide
guide running life.
Clean the slide guide regularly and also pour some grease.
Recommended grease: Multemp PS2 (Produced by Kyodo Yushi Co. Ltd )
(Lithium grease 2)
8-2. Disposing of oil waste
If the waste oil pan is full filled in the oil bottle (No.1), remove the oil bottle then dispose of the waste oil.
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9. TROUBLESHOOTING
CAUTION
(1) Please make sure to turn the power switch off before adjusting the sewing machine.
(2) If the adjustment is required while the power switch on, do not step on the foot switch by mistake.
Condition Cause Corrective action Reference
Upper thread is broken.
Upper thread tension is too tight.
Strength of thread take up spring is inappropriate.
Parts on needle plate, hook, and presser foot touching thread are damaged.
The needle size is bigger than the thread size.
Adjust thread tension.
Adjust thread take up spring.
Grind parts or change parts.
Change the needle size to suitable size.
6-3
7-16
-
5-2
Thread melts with heat. Slow down the sewing speed 6-1
Use needle cooler.
Bobbin thread is broken.
Bobbin thread tension is too tight.
Parts on needle plate and presser foot touching thread are damaged.
Upper thread is pulled from needle hole when starting sewing.
Thread tail is short.
Thread take up spring tension is too much.
Frequent skip stitching happens.
Adjust thread tension.
Buff parts or change parts.
Adjust thread tail with pre-tension.
Clearance between needle and rotating hook is too big.
Adjust thread take up spring tension.
Adjust clearance between needle and rotating hook properly.
Timing of needle and rotating hook is not proper.
Adjust position of needle and rotating hook properly.
Needle is bent. Change needle.
-
6-3
-
7-17
7-16
7-2
7-2
5-2
Trimming is not functioned.
Needle is at wrong position. Fix position properly.
Fixed knife is dull.
Movable knife is at wrong position.
Sharpen fixed knife or change fixed knife.
Adjust position of movable knife properly.
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5-2
7-12-2
7-12-2.7
Trimming is not functioned.
Skip stitching happens in trimming.
Trimming setting is off.
Refer to the condition
“Frequent skip stitching happens”.
Turn trimming setting on.
Stitch forming is loose.
Upper thread tension is too loose.
Bobbin thread tension is too loose.
Strength of thread take up spring is inadequate.
Presser foot position is not proper.
Presser foot up and down timing is not proper.
Stitch on back comes apart.
Needle thread is too long.
Adjust upper thread tension.
Adjust bobbin thread tension.
Adjust strength of thread take up spring.
Adjust presser foot position properly.
Adjust presser foot up and down properly.
Adjust needle thread with pre-tension.
Work holder does not fall.
Foot switch is broken.
Work holder presser is not strong enough
Work holder switch is out of order
Wiper system does not work.
Wiper hits needle or presser foot.
Change foot switch.
Increase work holder presser
Change it new work holder switch
Adjust wiper position.
Wiper setting is turned off. Turn wiper setting on.
-
Operation panel section
6-3
6-3
7-16
7-7,7-8,
7-9
7-5
7-17
-
7-13
-
7-11
7-11
Sewing pattern is changed.
7-13
Returned home position is changed.
Sewing material is not pressed properly.
Sewing material in work clamp slips.
Adjust work holder pressure.
Put slip stopper on presser plate.
Sewing material is too heavy. Slow down sewing speed.
X-Y timing belt tension is loose.
Adjust X-Y belt tension properly.
Ambient temperature is out of use range.
Use sewing machine in ambient temperature in 5 degrees to 35 degrees.
Clearance between detector and detecting subject is too wide.
Adjust clearance in 1 to
1.5mm.
-
6-1
7-22
-
7-21
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Printed in Japan
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