Pfaff 483, 481 service manual Position of bobbin case opener

Page 18

12

Position of bobbin case opener

Requirement

1.Small hook (481 and 483)

With bobbin case opener 3 in its left point of reversal there must be a clearance of approx. 0.8 mm between the front edge of the bobbin case opener finger and the edge of bobbin case base 6.

2.Large hook (481 and 483)

At the left point of reversal of bobbin case opener 3 the front edge of the bobbin case opener finger must be roughly 0.6 mm behind the front edge of bobbin case cam 7.

3.Large hook and small hook (481 and 483)

At the left point of reversal of bobbin case opener 3 there must be a clearance of roughly 0.3 mm between bobbin case base 6 and positioning finger 8 and stop screw 1 must be in contact with stop pin 5.

 

6

 

 

0,8 mm

 

 

3

 

 

5

4

 

1

 

2

1

 

 

0,3 mm

 

8

 

7

 

 

0,6 mm

 

6

3

3

 

 

 

●Loosen screw 1. Then loosen screw 2 so that bobbin case opener 3 is still held in position.

●Adjust bobbin case opener 3 according to requirements 1 and 2.

●Turn bobbin case opener 3 according to requirement 1 and tighten screw 2.

●Set fixing collar 4 against bobbin case opener 3 and stop pin 5 and tighten screw 1.

PFAFF 17

Page 17 Page 19
Image 18
Page 17 Page 19
Contents 481 483 Contents Tools, gauges and other adjustment aids AbbreviationsChecking and adjustment aid Preliminary adjustment of needle height Zeroing procedure with the gearbox closed Zeroing the feed motionZeroing procedure with the gearbox open Pfaff Feed lifting motion Feed dog height Feed driving motion Pfaff Centering the needle in the needle hole For PfaffFor Pfaff Eccentric hook shaft bearing and hook-to-needle clearance Pfaff Vertical position of bobbin case opener Position of bobbin case opener Timing the bobbin case opener Clearance between presser foot and needle plate Pfaff Tension release mechanism Thread check spring and thread regulator Knee lever resting position Knee lever play Adjusting the knee lever motion Bobbin winder Limiting the stitch length Matching forwards and reverse stitch lengths Presser foot pressure Page Pfaff Aktiengesellschaft

481, 483 specifications

The Pfaff 481 and 483 are renowned industrial sewing machines celebrated for their robust construction and advanced features tailored for heavy-duty sewing applications. These models are particularly favored in industries dealing with leather, canvas, and other heavy materials, making them ideal for manufacturing products like bags, belts, and upholstery.

Both the Pfaff 481 and 483 share a powerful sewing mechanism that operates at high speeds, enhancing productivity in industrial settings. They are equipped with a walking foot system that ensures even feeding of multiple layers of thick materials, significantly reducing the risk of puckering or uneven stitches. This feature is essential when dealing with bulky fabrics, as it allows for consistent stitching quality across varying thicknesses.

One of the main characteristics of these models is their superior stitch quality. The Pfaff 481 and 483 utilize a high-quality needle bar that delivers precise needle penetration and minimizes thread breakage. Their stitch length can be easily adjusted, allowing for versatile applications from heavy tacking to delicate decorative stitches. Additionally, these machines support various stitch styles, including straight, zigzag, and overlock stitches, providing versatility for diverse sewing projects.

In terms of technology, the Pfaff 481 and 483 incorporate a clutch motor that delivers reliable power without compromising on performance. This motor is designed to handle heavy workloads, making the machines suitable for continuous use in demanding environments. The user-friendly interface and easy-to-navigate controls ensure that operators can quickly adjust settings according to their specific needs.

Moreover, both models are built with durability in mind. The heavy-duty metal framework provides stability during operation, which contributes to the longevity of the machines. Maintenance is also straightforward, with easily accessible parts that promote efficiency when servicing or replacing components.

In conclusion, the Pfaff 481 and 483 are exemplary industrial sewing machines known for their durability, advanced features, and high-quality performance. Their ability to handle tough materials and diverse sewing techniques makes them invaluable tools for professionals in the textile and manufacturing industries. Whether for leather work or heavy fabrics, these models deliver reliable results, ensuring that users can achieve their desired outcomes with ease and precision.
Top Page Image Contents