HE-800B
11. TROUBLESHOOTING
83
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 Check
Remedy
Page
Backtack shape
Checking the number of
end backtack stitches
Checking the end backtack
width
Adjust the setting values for parameter numbers 51
and 52.
39
Work clamp pressure
Increase work clamp pressure.
* The standard height of the adjustment screw is
approximately 30 mm, so tighten it further than this.
66
Work clamp
When using knit material, replace with the -3 work
clamp and needle plate.
*
Upper thread trimmer
opening timing
Adjust to an appropriate opening timing.
69*
Upper thread trimmer
operation
Apply grease to the inclined face of the opening cam.
69*
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.
70*
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 Check
Remedy
Page
Start backtack
Number of start backtack
stitches
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.
38
Rear tack
Rear tack vector shape
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.
38
Needle plate
Needle plate
・
When using knit material, replace with the -3 needle
plate.
・
Replace with a needle plate with a smaller needle
hole.
*