Lewis 150-2 - Key Machine Adjustments; Skipping Stitches Troubleshooting; Timing Machine Components; Presser Foot Adjustment

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SKIPPING STITCHES
Examine point of needle to see if it is blunt or turned
over. Replacing needle will generally remedy skipping of
stitches.
REPLACING NEEDLE
Insert needle into needle carrier as far as possible and
tighten the set screw. Needle should bear slightly on the
needle guide.
IMPORTANT! --OIL MACHINE DAILY
SPEED
The LEWIS Class 150 machines can be operated up to
3000 stitchesper minute. A speed of 1800 to 2200stitches
per minute is recommended in starting a new machine or
with a new operator. Speed may be increased to suit
operator or type of work.
TIMING
All basic driving parts are properly timed wi th spot
screws.
PRESSER FOOT
Replace needle carrier with gauge No. 7-14 against
the stop collar. Rotate counter-clockwise and 1.1ove for-
ward to present inside left corner of gauge thru needle
guide. Adjust presser foot to gauge.
Note: This gauge is not applicable for the presser feet
No. 405-529.
RIDGE FORMING DISC (Refer to Plates 1 and 1A
The disc must be adjusted to be in the center of the slot
in the presser foot, and so that the nose of the disc is set in
relation to the needle.
Before setting the disc be sure that there is no end play
to the cradle No. 140-11. Any end play can be taken up by
adjusting the pivot bearing screw No. 18-869. Set screw
No. 1003 L must first be loosened and the tension of spring
No. 21-377 released. Adjust pivot screw No. 18-869 just
enough to take up play, but the cradle must move very
freely. Check by moving cradle by hand, then lock pivot
screw in place by tightening set screw No. 1003 L to lock
No. 18-869 in place.
From the library of: Superior Sewing Machine & Supply LLC