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9
Function of reverse feed stitching on the way (Function setting Nos. 30 to 33 OBT, OBTS, OBTT)
Functions of the limit of number of stitches and thread trimming command can be added to the touch back
switch on the sewing machine head.
Function setting No. 30
Function of reverse feed stitching on the way is selected.
0 : off
Normal back-tack function
1 : on
Function of reverse feed stitching on the way
Function setting No. 31
Number of stitches performing reverse feed stitching on the way is set.
0 to 19 stitches <1 / stitch>
Function setting No. 32
Effective condition of reverse feed stitching on the way
0 : off
Inoperative when the sewing machine stops.
(Reverse feed stitching on the way functions only when the sewing machine is running.)
1 : on
Operative when the sewing machine stops.
(Reverse feed stitching on the way functions both when the sewing machine is running
and stops.)
Either condition is operative when the sewing machine is running.
Function setting No. 33
Thread trimming is performed when reverse feed stitching on the way is
completed.
0 : off
Without thread trimming
1 : on
Thread trimming is executed.
Actions under each setting state
Application
1
2
3
4
5
No.30
0
1
1
1
1
No.32
0 or 1
0
1
0
1
No.33
0 or 1
0
0
1
1
It works as normal touch-back switch.
When operating touch-back switch at the time of depressing front part of
the pedal, reverse feed stitching as many as the number of stitches
specified by the function setting No. 31 can be performed.
When operating touch-back switch at the time of either stop of the sewing
machine or depressing front part of the pedal, reverse feed stitching as
many as the number of stitches specified by the function setting No. 31
can be performed.
When operating touch-back switch at the time of depressing front part of
the pedal, automatic thread trimming is performed after reverse feed
stitching as many as the number of stitches specified by the function setting
No. 31 has been performed.
When operating touch-back switch at the time of either stop of the sewing
machine or depressing front part of the pedal, automatic thread trimming
is performed after reverse feed stitching as many as the number of stitches
specified by the function setting No. 31 has been performed.
Function setting
1
Used as the normal reverse feed stitching touch-back switch.
2
Used for reinforcing seam (lapped seam) during sewing.
(It works only when the sewing machine is running.)
3
Used for reinforcing seam (lapped seam) during sewing.
(It works either when the sewing machine stops
or when the sewing machine is running.)
4
Used as starting switch for reverse feed stitching at the sewing end. (Used as the substitute for thread
trimming by depressing back part of the pedal. It works only when the sewing machine is running. It is
especially effective when the sewing machine is used as the standing-work machine.)
5
Used as starting switch for reverse feed stitching at the sewing end. (Used as the substitute for thread
trimming by depressing back part of the pedal. It works either when the sewing machine stops or when
the sewing machine is running. It is especially effective when the sewing machine is used as the standing-
work machine.)
Reference
Output function
