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General| Brand | Pfaff |
|---|---|
| Model | 938 |
| Category | Sewing Machine |
| Language | English |
Lists specific positions for needle bar adjustment (e.g., t.d.c., b.d.c.).
Steps to center the needle in the needle hole for sewing direction.
Guide to align the stabilizing rod parallel to the needle bar.
How to adjust the stitch width locking lever for proper function.
Procedure to ensure the needle is zeroed correctly for straight stitches.
Aligning the stitch width scale to the correct zero mark.
Setting the maximum stitch width limit.
Steps to center the needle in the needle hole laterally.
How to adjust the needle throw for correct operation.
Setting the needle to left, center, and right positions.
Detailed steps for adjusting the needle position lever.
How to adjust the stitch length scale ring.
Procedure for zeroing bottom feed with a closed gearcase.
Procedure for zeroing bottom feed with an open gearcase.
Steps to adjust the bottom feed driving motion.
Specific adjustment for PFAFF 918 and 938 models.
Specific adjustment for PFAFF 838 model.
How to tension the driving belt in the gearcase.
Steps to adjust the hook bearing bracket.
Initial adjustment for needle bar height.
Adjusting hook timing, clearance, and bobbin case finger position.
Final steps for adjusting needle bar height.
Adjusting the position of the bobbin case opener.
Procedure for timing the bobbin case opener.
Steps to adjust the slack thread control wire.
Setting the correct clearance between presser foot and needle plate.
Adjusting feed dog height for PFAFF 918/938.
Adjusting feed dog height for PFAFF 838.
Adjusting the tension release mechanism.
How to supply and refill oil for the zigzag eccentric.
Limiting the stroke of the knee lever.
Adjusting the play in the knee lever mechanism.
Setting bobbin winder engagement and automatic stop.
Adjusting the thread check spring and regulator.
Adjusting the presser foot pressure.
Adjusting needle vibration for zigzag stitch.
Setting left, center, and right needle positions for zigzag.
Steps to adjust plate for needle position settings.
Adjusting the needle position lever for zigzag control.
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