Lewis 150-2 - Page 19

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Loosen the two set screws on the looper crank - See
Figure 4, and turn crank slightly in a clockwise direction until
the needle does not strike the crotch. Tighten the set screws.
The needle must enter between the prongs of the loop-
er, clearing the two prongs about an equal amount.
In case the needle should not enter about midway of
the two prongs - to correct this, loosen the sleeve clamp screw
- Figure 2, and turn the looper eccentric sleeve - Adjustment
5, Figure 2, until the prongs of the looper are about an equal
distance from the needle. When this setting has been made,
tighten the sleeve clamp screw - See Figure 2.
Continue to rotate the hand wheel in a clockwise direc-
tion until the point of the long prong of the looper is over the
center line of the needle. Check to see that the point of the long
prong of the looper is 3/32" from the inner end of eye of the
needle and that the point of the long prong just clears the scarf
of the needle. In case the above conditions do not exist, they
must be corrected - this is done as described in the fifth to
tenth paragraphs inclusive under the heading "ADJUSTING AND
SETTING THE LOOPER''· Be sure to roll the looper -Adjust-
ment 4, Figure 5. Do not turn the looper eccentric sleeve.
The machine, as far as the looper and needle are con-
cerned, is now ready to sew. Different material or different
Jthreads may cause a slight variation from the above adjustments.
However, these adjustments will give the best results when pad-
ding or hemming the more heavy materials. When hemming
silks and cotton, however, it may be advisable to set the point
of the needle l/16" from the needle setting surface on the pres-
ser foot - Figure 3, instead of 3/32", without changing the loop-
er position by re-adjusting the needle ball stud - Adjustment 1,
Figure 1 - the timing dots on the ball stud should be turned in
direction towards the hand wheel to obtain slightly more throw to
the needle resulting in a larger thread loop.
RETAINER OR CLOTH CLAMP
The Cloth Retainer located in the cloth opening of the
presser foot mus.t at all times be adjusted as close to the
needles as possible and set relative to the ridge forming disc to
firmly hold the work on to the disc while the needle is penetrat-
ing the material. If the work is carried along with the needle,
no loop will form, resulting in missed stitches.
From the library of: Superior Sewing Machine & Supply LLC