Height Of The Main And Differential Feed Dogs - Pfaff 939 U Instruction Manual

12

Height of the main and differential feed dogs

.05.29
Requirement
With the stitch length set at "0" and the needle bar positioned at 0.25 after t.d.c. (hole 3):
1. The feed dogs should be in the centre of the needle plate cutout and be touching the
feed dog height adjustment gauge over their whole length.
2. There should be a distance of approx. 4 mm between the feed dogs.
Fig. 12 - 30
● Place the feed dog adjustment gauge under the sewing foot with the cutout facing down.
● Lower the sewing foot until it touches the gauge.
● Press up both feed bars and adjust the feed dogs in accordance with requirement 2.
● Adjust lifting cranks 1 (screws 2) and eccentric clamp bushings 3 (screws 4) in
accordance with requirement 1.
ca. 4,0 mm
1
2
3
4
Adjustment
1
2
4
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