Happy HCS-1201-30, Руководство по обслуживанию

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Trouble shooting(Upper thread comes off from needle hole)
7-2-5
Trouble Factor Cause of trouble and measure Page
Upper thread
Mechanical
11.Check the needle bar moves when start sewing.
comes off 11-1 Adjust position to fix jump solenoid. 3-2-5
from needle 11-2 Replace needle bar driver. 3-2-4
hole 12. Is number of revolution proper when sewing started? (11-1)
12-1 Make automatic speed setting. 5-3-1
13.Is height of pressure foot proper?
13-1 Adjust as specified. 3-2-9
Operator 1. Isn't thread tension too strong? (4-5) (8-1)
1-1 Weaken tension not to cause trouble in sewing rhythm.
2. Keen in cleaning thread cut device? (10-2)
2-1 Clean bobbin thread holder regularly.
3. Is setting of bobbin thread proper? (4-5)
3-1 Pass thread on bobbin thread guide surely.
4. Is bobbin thread properly wound? (4-4) (4-5)
4-1 Adjust tensile strength of bobbin winder and check holding plate.
4-2 Pull out bobbin thread to check if it comes out smoothly.
5. Is upper thread properly passed? (4-6) (4-7)
5-1 Pass properly again.
6. Does thread cone stand properly? (4-6)
6-1 Keep thread from hitting felt.
6-2 Stand vertically.
7. Is [create] properly set? (5-1)
7-1 Select longer setting of upper thread length.
7-2 Select setting of slow start [5 stitches].
7-3 Select start lock stitch [effective].
7-4 Set TRD.Long in the Maintenance mode. 5-6-5
(Change cutting longitude of Upper thread)
Thread & 1. Is thread used to suit embroidery? (thread twist, tender thread). 3-1-3
Cloth 1-1 Don't use too strongly twisted thread.
1-2 Twist of thread is to be left-wise.
1-3 Use tender thread.
1-4 Don't use thread with knot or uneven size.
Environment
1. Does wind let thread go beyond control? (outside wind, heater, and fan etc.) (2-5)
1-1 Keep the embroidery machine off from wind.
2. Is voltage of power as rated and stable?
2-1 Supply rated voltage.
Pattern 1. Is there stop sewing stitch for start sewing?
1-1 Modify pattern.