Adjustment Of Equal Forward And Reverse Stitch Length For Pfaff Expression 2014/2024 - Pfaff expression 2014 Service Manual

20. Adjustment of equal forward and reverse stitch length for Pfaff expression 2014 / 2024
(for all forward and reverse controlled stitch patterns)
Requirement:
Adjusting program 95 must be sewn as a rectangle (fig. 52) and not be sewn from the machine as a
rhombus (fig. 53 or fig. 54).
Linen buttonhole, stitch pattern "09", must be sewn by the machine symmetrically (fig. 55.)
In this case the machine must be at operating temperature, i.e. switch-on time 10 - 15 minutes.
Check:
Switch off the machine.
Turn on the machine by pressing key "0" and the master switch.
The display shows adjusting program "95".
Place a piece of fabric under fancy stitch foot "2".
Sew adjusting program "95" (fig. 52).
Preliminary adjustment:
If a rhombus was sewn as seen in fig. 53, turn the adjusting eccentric just 2 - 4 degrees in direction "A"
using a screwdriver, as shown in fig. 58.
If a rhombus was sewn as seen in fig. 54, turn the adjusting eccentric just 2 - 4 degrees in direction "B"
using a screwdriver, as shown in fig. 58.
Cross-check:
Sew adjusting program "95" and check.
Select adjusting program "09", linen buttonhole, and sew.
Check the symmetry of the linen buttonhole.
Precise adjustment:
If the buttonhole bartack does not close exactly on the position where the front buttonhole seam starts
(fig. 55), proceed as follows:
If the linen buttonhole was sewn as seen in fig. 56, turn the adjusting eccentric 1 - 2 degrees in
direction "A" using a screwdriver, as shown in fig. 58.
If the linen buttonhole was sewn as seen in fig. 57, turn the adjusting eccentric 1 - 2 degrees in
direction "B" using a screwdriver as shown in fig. 58.
Cross-check:
Select stitch program "09" (linen buttonhole).
Place a piece of fabric under buttonhole foot "5".
Sew stitch program "09".
The bartack must cover the start of the right buttonhole seam (fig. 55).
50