Bernina 1130 Service Manual

Adjusting the lateral position of the feed-dog and thrust fork.

Checking or adjusting the feed-dog height as described in section 23.

Procedure to adjust the thread take-up lever and guide against the crank.

Adjusting the feed-dog height to the specified range using a gauge.

Adjusting the hook driver stem for correct spacing.

Adjusting the hook drive crank to match marked points.

Aligning the hook tip flush with the needle's right-hand edge.

Checking lower thread tension using a weight gauge and adjusting screw.

Checking upper thread tension by aligning the adjusting dial.

Adjusting upper thread tension using the tensioning spindle.

Adjusting upper thread tension using an 85-gram weight.

Adjusting the tension spindle using an Allen key with a weight attached.

Equalizing the buttonhole foot using a potentiometer and sensor.

Adjusting the buttonhole sensor for correct operation.

Adjusting magnet support and motor for zero equalization.

List of adjustments required after reassembling the rigidity plate.

List of adjustments required after reassembling the head frame.

List of adjustments required after reassembling the carrier.

Steps for isolating defective parts using diagnosis and test instructions.

Warnings about connecting the machine and working on plugged-in components.

Information regarding dangerous voltages on power print L-4200 and main motor.

Criteria for an antistatic workbench surface for component handling.

Guidelines for using an antistatic wristband for personnel protection.

Interpreting LED indicators for power supply checks.

Checking motor operation and drive signal (LED F) in ON position.

Checking motor stop and drive signal (LED F) in OFF position.

Adjusting the buttonhole sensor on S-4200 for automatic function.

Adjusting for buttonhole automatic function on Ret-4200 print.

Procedure for sewing a buttonhole using automatic function.