Bernina 931 User Manual

For quality supplies please visit https://shrsl.com/33dbl

Bernina 931 Specifications

General

Brand	Bernina
Model	931
Category	Sewing Machine
Language	English

Summary

Adjustment Procedures

Dismantling Covers

Link and Stitch Position Adjustment

Needle Position Adjustments

Lateral Needle Movement

Zig-Zag Stitch Position

Zig-Zag Needle Motion

Cam Control Adjustments

Lateral Needle Motion with Cam Control

Hook Adjustment

Return Motion Setting

Loop Lift Adjustment

Needle Height Adjustment

Hook and Thread Guide Plate Adjustments

Thread Guide Plate Adjustment

Feed-Dog Adjustments

Feed-Dog Advance and Lift

Adjusting the feed-dog's advance and lifting mechanisms.

Stitch Length and Setting Link

Zero Position of Stitch Setting Link

Feed-Dog Positioning and Height

Feed-Dog Height Adjustment

Feed-Dog Limit and Zero Position

Zero Feed Position

Feed-Dog Control Stitch Length

Cam Set Basic Settings

Positioning Feed-Dog Control Cam

Cam Set Fitting and Adjustment

Presser Foot Bar Adjustments

Presser Foot Fixing and Adjustment

Presser Foot Pressure Regulation

Needle Stop Device Settings

Bearing Plate and Latch Lift Settings

Setting the bearing plate and latch lift for the needle stop device.

Needle Stop Switch Operation

Switch Operation Check and Adjustment

Verifying and adjusting the needle stop switch operation.

Needle Positioning Adjustment

Upper Thread Tension Adjustment

Lower Thread Tension Adjustment

Thread Regulator Setting

Automatic Buttonholer Adjustments

Stitch Length Knob and Stop Settings

Setting the stitch length knob and its stop for the buttonholer.

Buttonholer Stitch Density

Bar Tack and Reverse Bead Density

Setting the density for bar tacks and reverse beads.

Buttonholer Bead Length Adjustments

Forward and Reverse Bead Length

Ensuring forward and reverse bead lengths are consistent.

Buttonholer Width Adjustments

Correcting Cut Gap and Bead Width

Adjusting cut gap and bead width for buttonhole accuracy.

Bobbin Winding Device Adjustments

Bobbin Winder Adjustments

Electronic System Construction

Exchanging Printed Circuit Boards (PCBs)

Motor Servicing

Motor Dismantling and Brush Replacement

Electrical Adjustments to Printed Circuit Board (PCB)