PFAFF 3806
Integrated sewing station for closing rub-down seams




Working method
The photocell controls following functions at the seam end:
- Automatic stopping of the machine with the needle down (which facilitates accurate positioning of the next part)
- Chain cutting
- Presser foot lifting
The length of the protruding thread chain can be set via parameter. The length of the starting thread chain is constant approx. 8 mm (-12/22) or 12 mm (12/23). The thread chain is clamped between sewing cycles and is not released until shortly after the next sewing cycle has begun. This ensures a reliable and seam start (and prevents the thread from being drawn into the needle hole). All the operator has to do is insert, guide and remove the workpiece.
Features
- Highest Output of 2,000 pairs of shoes in 480 minutes, sewing an 8-cm-long
- curved heel seam
- Elastic and flexible seam; no bursting of the heel seam at high pressure
- Sturdy sewing parts enable closing heel seams on shoes or boots made from heavier materials
- Shift-free sewing of problem materials ensured by a favourable combination of feed mechanisms (top feed stroke can be set independently of the bottom feed stroke; in addition, the pressure of presser foot and vibrating presser can be varied separately)
- Consistently high quality of the sewn parts, largely independent of the operator‘s skill, as a result of partial mechanization of the work cycle
- Low training costs: The simple operation of the machine, reduced to a minimum by automatic control sequences (via parameter or photocell)
- 3806-12/22: For processing heavy fabrics
- 3806-12/23: For processing light to medium heavy fabrics as well as operations with narrow radii the bottom with trimming unit for the precise positioning of tape beginning and tape end

Specifications
- Max. sewing speed: 4,000 s.p.m.
- Max. stitch length:
-12/22: 3,5 cm
-12/23: 4,5 cm - Clearance under the sewing foot:
-12/22: 7 mm
-12/23: 9 mm - Needle system:
-12/22: 4463-KKS
-12/23: 4463-35-KKS - Needle size:
-12/22: Nm 80 - 100
-12/23: Nm 80 - 120 - Thread size:
-12/22: to 40/3 synth.
-12/23: to 40/3 synth.
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