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5.2
Fitting and tensioning the V-belt
Removing the protective devices (if they are fitted when the machine is delivered)
–
Remove the two-part belt guard 1 and 2 on the upper part.
The attachment screws are accessible through the holes in both parts of the belt
guard.
–
Remove the belt guard 10 on the sewing drive 9.
Fitting the V-belt and belt guard
–
Attach the belt pulley (supplied) to the sewing-drive shaft 9.
–
Place the V-belt 3 on the belt pulley on the upper part.
–
Pass the V-belt 3 down through the opening in the table plate.
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Turn the upper part back.
–
Place the V-belt 3 on the belt pulley of the sewing drive 9.
–
Turn the upper part forward again.
–
Fit the two-part belt guard 1 and 2 to the upper part.
–
Screw on the anti-twist device 8 for the proximity switch 7 (Efka VD554KV/6F62AV
and Quick QD554/A51K01 drive units only).
Tensioning the V-belt
–
Undo screw 11 on the base of the sewing drive 9.
–
Tension the V-belt 3 by swivelling the sewing-drive 9.
When the belt is correctly tensioned It must be possible to depress it by about 10
mm by gently pressing on it with a finger at its mid-point.
–
Tighten screw 11.
Fitting the belt guard to the sewing drive
–
Adjust the run-off protectors (adjustable cams or joints, depending on the drive
type) of the belt guard 10 as follows:
With the upper part turned back the V-belt 3 must remain in contact with the belt
pulleys.
–
Fit the belt guard 10 to the sewing drive 9.
5.3
Fitting the bobbin winder
The V-belt 3 drives the bobbin winder via the bobbin-winder wheel 4.
–
Swivel the bobbin-winder lever 5 against the bobbin.
–
Attach the bottom of the bobbin winder 6 to the table plate with two timber screws.
Use the slots 12 to align the bottom of the bobbin winder 6 as follows:
The bobbin-winder wheel 4 must be in contact with the V-belt 3 under very slight
pressure.
–
Turn the handwheel.
The bobbin-winder wheel 4 must turn with it.
15
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