Uneven Seams; Thread Sticking Out At End Backtack; Sticking In Needle Plate - Brother HE-800B Instruction Manual

11. TROUBLESHOOTING
11-10. Uneven seams (8) ...... Thread sticking out at end backtack
Items with a "*" in the "Page" column should only be handled by a qualified technician.
Cause
Backtack shape
Uneven material
feeding
11-11. Uneven seams (9) ...... Sticking in needle plate
Front and rear tack sections of material gets stuck in needle hole
Items with a "*" in the "Page" column should only be handled by a qualified technician.
Cause
Start backtack
Rear tack
Needle plate
83
Check
Checking the number of
end backtack stitches
Checking the end backtack
width
Work clamp pressure
Work clamp
Upper thread trimmer
opening timing
Upper thread trimmer
operation
Lower thread clamp
opening timing
Check
Number of start backtack
stitches
Rear tack vector shape
Needle plate
Remedy
Adjust the setting values for parameter numbers 51
and 52.
Increase work clamp pressure.
* The standard height of the adjustment screw is
approximately 30 mm, so tighten it further than this.
When using knit material, replace with the -3 work
clamp and needle plate.
Adjust to an appropriate opening timing.
Apply grease to the inclined face of the opening cam.
Adjust so that the lower thread clamp plate opens
when the feed mechanism moves 6 - 7 mm.
Remedy
Use parameter number 38 to reduce the number of
stitches in the front tack.
* If the material is soft, it can be effective to set the
number of stitches to 0.
Use parameter number 31 to set the rear tack vector
shape to a rectangle.
* Setting the vector shape to a rectangle can be
effective when the width is less than the bar tack
width.
・When using knit material, replace with the -3 needle
plate.
・Replace with a needle plate with a smaller needle
hole.
HE-800B
Page
39
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69*
69*
70*
Page
38
38
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