10. Optional equipment
10.1 Residual-thread monitor RFW 13-3/RFW 13-6/RFW 13-8/RFW 13-9
The residual-thread monitor monitors the amount of thread in the shuttle bobbin. An
acoustic s ignal is sounded when only a small amount of thread is left.
The operative can finish the seam and fit a new spool. This avoids material damage and
thus any need for repairs.
The residual-thread monitor RFW 13-3, part no.: 0767 367629, can be fitted to all
single-needle 767 sewing machines with a thread cutter.
The residual-thread monitor RFW 13-6, part no.: 0767 590244, can be fitted to the class
767-KFA-573-RAP/HP (short thread trimmer).
The residual-thread monitor RFW 13-8, part no.: 0767 590194, can be fitted to the class
767-KFA-373 (short thread trimmer).
The residual-thread monitor RFW 13-9, part no.: 0767 590234, can be fitted to the class
767-FAS-473 / 767-VF-573 (oversized hook).
Function and operation of the residual-thread monitor
If the light beam from the light barrier is re flected by the surface 3 of the spool, the
sewing process is interrupted.
An acoustic signal sounds for 2 seconds.
–
Release the pedal and then push it forwards again.
The seam is continued. The amount of thread in the supply groove 4 of the shuttle
bobbin is usually sufficient to complete it.
–
At the end of the seam pull the pedal back.
The thread is cut off. The acoustic signal sounds for a further 2 seconds to remind
the operator to change the spools.
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