7. ADJUSTMENT
HE-800B
98
7-12-3. Adjusting the lateral position of the upper thread scissors at the sewing start
1. Turn on the power and set the sewing machine to the home position. Then press the THREAD key to lower the work clamp.
2. Loosen the bolt (2), and then move the stopper (3) in and out to adjust so that the edge of the upper thread scissors
assembly (1) protrudes by approximately 1 mm from the center of the cutter.
Note:
If the amount of protrusion of the upper thread scissors assembly is too great, the scissors may touch the needle
when they open.
3. After adjusting, carry out “7-12-8. Adjusting the upper thread scissors opening timing”.
7-12-4. Adjusting the longitudinal position of the upper thread scissors
1. Turn off the power (with the feed mechanism at the home position), and then slowly move the trimmer driving arm (1)
forward until the upper thread scissors assembly (2) is at the position shown in the illustration.
2. Loosen the two screws (3), and then move the upper thread scissors assembly (2) back and forward to adjust so that the
front ridge line of upper thread scissors U (4) is aligned with the edge of the needle hole.
Note:
If this adjustment is not carried out, it may result in thread trimming errors or needle breakages.
4323Q
4326Q
1779B
Approx. 1 mm
Aligned
1778B
Summary of Contents for HE-800B
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Page 75: ...6 ASSEMBLY HE 800B 66 D E 0688D 0690D ...
Page 126: ...9 ELECTRIC MECHANISM HE 800B 117 Power PCB Cutter PCB LCD panel PCB 0831D 0768D 0769D ...
Page 133: ...9 ELECTRIC MECHANISM HE 800B 124 0851D ...
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Page 177: ...MEMO 168 HE 800B ...
Page 178: ...SERVICE MANUAL 2014 Brother Industries Ltd All Rights Reserved HE 800B I3061003D 2014 03 D 1 ...