Cutter Operation - Brother LH4-B800E Instruction Manual

5-4-6. Cutter operation

The cutter operating pattern can be selected from the following four patterns.
• Center knife operation, where the cutter operates when sewing of the buttonhole is complete
• Rear knife operation, where the cutter operates when sewing of the buttonhole is complete and the
material is fed so that the cutter is near the front tack
• Front knife, where the cutter operates before the final cycle of zigzagging stitches is sewn
• A combination of front knife and center knife
Parameter No. 44
0: Center knife (standard)
1: Rear knife
2127Q
B A
2.2 mm
2: Front knife (Not available for single cycles. Only available when sewing two or more cycles.)
• This is used in cases such as when the rough edges of the material after cutting are hemmed by the
buttonhole stitches.
The cutter operates before the left zigzag stitch of the last cycle is sewn.
3: Front knife + Center knife
(Not available for single cycles. Only available when sewing two or more cycles.)
• This is used in cases such as when the rough edges of the material after cutting are hemmed by the
buttonhole stitches.
It can also be used if the rough edges of the material block the buttonhole after the left and right zigzag
stitches have been sewn.
The cutter operates before the left zigzag stitch of the last cycle is sewn, and then operates again after
the right zigzag stitch is sewn.
0: Center knife 1: Rear knife
Feeding
2: Front knife
2128Q
Because the needle and knife positions are sepa-
rated by 2.2 mm as shown in the illustration, the
distance between the edge of the front tack and the
edge of the buttonhole cannot be set to less than 2.2
mm. In other words, if the knife Y space (A) is set to
0.5 mm, the front tack length (B) cannot be set to
less than 1.7 mm. If you would like the front tack
length to be less than 1.7 mm, the cutter can be
made to operate after sewing and feeding are
complete.
HE-8000
5. OPERATION
3: Front knife +
Center knife
2126Q
49