Simplicity SA2200 - Manual (Page 31)

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Create a bold look or add extra color to a stitch by sewing
with two threads through the upper threading path. Use a
size 16 needle or topstitching needle (not included) which
has a larger eye to accommodate two threads.
Place a spool of thread on the left spool pin with the thread
coming off the back. Thread the machine as usual. Place a
second spool of thread on the right spool pin with the thread
coming off the front [Fig. 1]. Thread the machine along the
same path and through the needle eye as for the first thread.
Select a stitch and sew.
Your sewing machine is designed for twin needle
sewing, which allows you to sew with two top threads
forming parallel stitching lines simultaneously. The twin
needle [Fig. 2, not included] has two needles mounted
to a single shank. Any stitch pattern, except for the button-
hole, can be sewn with the twin needle. Do not use a
stitch width greater than 3. Before stitching, manually turn
the handwheel to make sure the needles clear the presser
foot and needle plate.
DOUBLE STITCHED HEM
Press up a 1-1/2˝ hem. Stitch on the top side of the fabric,
one inch from the fold of the hem [Fig. 2]. Trim the excess
hem allowance on wrong side of fabric close to the stitching.
Use a size 14 or 16 needle when sewing through multiple
layers of heavy fabric. The needle will penetrate the fabric
more easily.
When you come to the side seam of the pant hem, place a
shim (such as a piece of cardboard the same thickness as the
seam) under the foot and against the seam [Fig. 5]. This levels
the foot so the machine can sew through the extra thickness.
Use a roller foot (not included) with this technique when
hemming jeans to aid in sewing over the dense side seams.
The textured rollers on the foot will help feed the fabric.
STITCH STITCH WIDTH LENGTH PRESSER FOOT
Any 0-5 1.5-4 Any
Fig. 2 Twin needle
Fig. 1
Fig. 3
SEWING WITH TWO THREADS
STITCH STITCH WIDTH LENGTH PRESSER FOOT
Any 0-3 1.5-4 Open toe
Fig. 5 Cardboard shim
SEWING OVER DENSE SEAMS
STITCH STITCH WIDTH LENGTH PRESSER FOOT
A 0 3-4 All-purpose
SPECIALTY SEWING TECHNIQUES
TWIN NEEDLE SEWING
Fig. 4 Double stitched hem