Pfaff 1491E1 Instruction Manual page 80

Adjustment
2
1
13 - 3
Select the SEWING MOTOR function.
Select the ADJUST SYNCHRONIZER function.
Turn the balance wheel in sewing direction until the point of the descending needle is at
the top edge of the needle plate.
With the needle in this position, turn synchronizer 2 until the cursor in the display is
at "0".
Tighten screws 1.
For other positioning options see the ADJUSTING POSITIONS function in
chapter 11.09 Summary of the service functions.