Brother International HE-800A Instruction Manual - English - Page 105

１６, １０, １１

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16. TROUBLESHOOTING １６-９. Uneven seams (7) ...... Loose thread end at end backtack Cause Backtack shape Check shape Check Remedy the backtack Set the value for parameter No. 68 to 1.0. * If the value is set to 1.0, the rear tack will change. Page 45 1.0 4004Q Uneven seams (8) ...... Thread sticking out at end backtack Cause Backtack shape Check shape Check Remedy the backtack Set the value for parameter No. 68 to 1.0. * If the value is set to 1.0, the rear tack will change. Page 45 1.0 4004Q Uneven feeding material Work clamp pressure Increase work clamp pressure. * The standard height of the adjustment screw is approximately 30 mm, so tighten it further than 74 this. Work clamp When using knit material, replace with the -3 work clamp and needle plate. - Upper thread scissors Adjust to an appropriate opening timing. opening timing 76 Upper thread scissors Apply grease to the inclined face of the opening operation cam. 76 Lower thread clamp Adjust so that the lower thread clamp plate opens opening timing when the feed mechanism moves 6 - 7 mm. 77 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 Check Number of start backtack stitches Rear tack vector shape Needle plate 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. Page 41 41 - 97 HE-800A

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HE-800A
16. TROUBLESHOOTING
97
１６
-
９
. Uneven seams (7) …… Loose thread end at end backtack
Cause
Check
Remedy
Page
Backtack shape
Check
the
backtack
shape
Set the value for parameter No. 68 to 1.0.
* If the value is set to 1.0, the rear tack will change.
45
１６
-
１０
. Uneven seams (8) …… Thread sticking out at end backtack
Cause
Check
Remedy
Page
Backtack shape
Check
the
backtack
shape
Set the value for parameter No. 68 to 1.0.
* If the value is set to 1.0, the rear tack will change.
45
Work clamp pressure
Increase work clamp pressure.
* The standard height of the adjustment screw is
approximately 30 mm, so tighten it further than
this.
74
Work clamp
When using knit material, replace with the –3 work
clamp and needle plate.
-
Upper
thread
scissors
opening timing
Adjust to an appropriate opening timing.
76
Upper
thread
scissors
operation
Apply grease to the inclined face of the opening
cam.
76
Uneven
material
feeding
Lower
thread
clamp
opening timing
Adjust so that the lower thread clamp plate opens
when the feed mechanism moves 6 – 7 mm.
77
１６
-
１１
. Uneven seams (9) …… Sticking in needle plate
Front and rear tack sections of material gets stuck in needle hole
Cause
Check
Remedy
Page
Start backtack
Number of start backtack
stitches
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.
41
Rear tack
Rear tack vector shape
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.
41
Needle plate
Needle plate
When using knit material, replace with the –3
needle plate.
Replace with a needle plate with a smaller needle
hole.
-
4004Q
4004Q
1.0
1.0