Operating instructions

2. Setting the Positioning Points
Caution Risk of Injury!
Set the positioning points only in the “Safe Stop” position or with the
machine turned off.
Rule and Control
With the aid of the positioning points, an easy setting of the needle
movement to the looper and spreader movements is possible.
When the arm shaft is in the stake-out position, the cams for the
spreader and looper must also be in the stake-out positions.
The positions are set at the factory so that the standard material can
be sewn with the 579.
If you wish to use other needle sizes, thread strengths or materials,
you may possibly need to set positions which deviate from the
stake-out position.
The positioning pins are to be found in the accessories pack of the
machine and have a diameter of 5 mm.
–
Turn the handwheel until the looper support 2 is in the left end
position. The needle bar must then be in the upper dead center in
front of the left needle entry into the material.
–
Turn the handwheel until the arm shaft can be staked out with a pin
through the drilled hole 1.
–
With another pin, check if the spreader cam (drilled hole 4) and the
looper cam (drilled hole 3) are in the stake-out positions.
–
The drilled hole 8 of the covering stitch cam must lie upward.
Caution Risk of Injury!
Set the swing motion only in the “Safe Stop” position or with the
machine turned off.
Correction
–
Stake out arm shaft with pin 1.
–
Stake out the looper and spreader (drilled hole 4 for the spreader
cam; drilled hole 3 for the looper cam).
–
If the positioning points do not fit:
Loosen the screws on the respective cam.
–
Turn the looper or spreader cam until the positioning pin 7 catches
in the groove 6 of the respective cam 5.
–
Tighten the screws again.
–
Loosen screws 9 on the toothed wheel.
–
Turn the cam shaft so that the stake-out hole 8 lies upward.
–
Tighten screws 9 again.
–
Remove the positioning pins.
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