Replacing The Top Cover; Checking The Needle Position In Relation To The Needle Plate Slot - Pfaff 260 Service Manual

Replacing the Top Cover
When converting a Pfaff 260 or 360 into an Automatic, replace the top cover
on the machine by the special top cover which is supplied with the automatic
embroidery mechanism.
To ensure that the pattern length regulating crank (50561) enters the regulating
slide (50368) smoothly, toke core that the top cover is replaced perpendicularly
from above, and that pattern length lever E (Fig. 113) is set between "5" and
"7".
If the position of pattern length lever E needs adjustment, loosen the set screw
on the driving crank (50558) and turn the crank on the stud of the pattern
length regulating crank (50561 ), as may be required. This adjustment may also
become necessary in order to bring the position of the pattern length lever in
line with the numbers on its scale.
Checking the Needle Position in Relation to the Needle Plate Slot
Disengage the automatic embroidery mechanism by setting lever E (Fig. 113)
and dial C on "0". Turn stitch width dial A to "0" and put needle position
lever B in the central notch. Turn the balance wl\eel in order to check whether
the (No. 90) needle is still correctly centered in the needle plate slot, and
whether it will clear e ither end of the slot when set for its widest bight.
If the needle has to be recentered in the needle plate slot, proceed as instruct-
ed on page 69.
Furthermore, there is a possibility that the spacing between the
central and outer positions of the needle in the needle plate slot
may hove changed so that the embroidery design produced lacks
symmetry (Fig. 112).
To remedy this condition, adjust as instructed on page 69.
After all machine settings have been checked and, if necessary,
adjusted, squirt oil freely into all oilholes marked red or other-
wtse.
Fig. 112 Asymmetric embroidery design caused by malodjustment of the auto·
malic embroidery mechanism
Mount oil pad holder 12 (Fig. 110) on the base so that the oil pad which lubri-
cates the pattern cams clears these cams with a springing distance. Soak this
pad with oil.
76