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

16. TROUBLESHOOTING
１６-９. Uneven seams (7) ...... Loose thread end at end backtack
Cause
Backtack shape
１６-１０. Uneven seams (8) ...... Thread sticking out at end backtack
Cause
Backtack shape
Uneven material
feeding
１６-１１. Uneven seams (9) ...... Sticking in needle plate
Front and rear tack sections of material gets stuck in needle hole
Cause
Start backtack
Rear tack
Needle plate
97
Check
Check the backtack
shape
Check
Check the backtack
shape
Work clamp pressure
Work clamp
Upper thread scissors
opening timing
Upper thread scissors
operation
Lower thread clamp
opening timing
Check
Number of start backtack
stitches
Rear tack vector shape
Needle plate
Remedy
Set the value for parameter No. 68 to 1.0.
* If the value is set to 1.0, the rear tack will change.
1.0
Remedy
Set the value for parameter No. 68 to 1.0.
* If the value is set to 1.0, the rear tack will change.
1.0
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 40 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 37 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-800A
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4004Q
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4004Q
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