Pfaff 1591 Instruction Manual page 62

Input
 Select the desired type of end backtack, the selected (active) function is displayed in-
 No end backtack
 Simple end backtack
 Double end backtack
Thread trimming
When the function is activated, thread trimming with the pedal function is possible.
Roller presser up
When this function is activated, the roller presser is raised after sewing stops.
 Conclude the input of the seam program and change to programmed sewing.
 Activate the "End program" function.
 Perform the thread trimming function by pressing the pedal, see chapter 7.02 Pedal.
 Conclude the input of the seam program and change to programmed sewing.
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