Adjustment Of Equal Forward And Reverse Stitch Length For Pfaff Expression 2034/2044 - Pfaff expression 2014 Service Manual

21. Adjustment of equal forward and reverse stitch length for Pfaff expression 2034 / 2044
(for all forward and reverse controlled stitch patterns)
Requirement:
Letters B, D, G, H sewn in succession must measure 34.5 +/- 0.5 mm and must not be distorted (fig. 62).
To this end 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 simultaneously.
The display shows adjusting program "95".
Place a piece of fabric under fancy stitch foot "2".
Sew adjusting program "95" (fig. 59).
Preliminary adjustment:
If a rhombus was sewn as seen in fig. 60, turn adjusting eccentric just 2 - 4 degrees indirection "A"
as shown in fig. 64.
If a rhombus was sewn as seen in fig. 61, turn adjusting eccentric just 2 - 4 degrees in direction "B",
as shown in fig. 64.
Cross-check:
Sew adjusting program "95" and check.
On model 2034, select adjusting program "96" (BDGH) by pressing the program selection key (fig. 65).
On model 2044, select adjusting program "96" (BDGH) by turning the program selection key (fig 66).
By sewing, check the length 34.5 +/- 0.5 mm.
Precise adjustment:
If the letters are distorted and longer than 35 mm, turn the adjusting eccentric with a screwdriver only
one degree in direction "B" according to fig 64.
If the letters are distorted and shorter than 34 mm, turn the adjusting eccentric with a screwdriver only
one degree in direction "A" according to fig. 64.
Cross-check:
Select stitch program "09" (linen buttonhole).
Place a piece of fabric underneath buttonhole foot "5".
Sew stitch program "09".
The buttonhole bartack must cover the right buttonhole seam (fig. 63).
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