Upper Threading; Note On Twin Needles - Pfaff synchrotronic 1229 Instruction Book

Upper threading
Raise presser bar lifter 37 to its horizontal
(K) position. Swing spool holder 13 back.
Place a spool of thread on the holder and
push the unreeling disc on the spool pin.
The accessories include two unreeling
discs, one for small spools, the other for
large spools. The large unreeling disc is
always used together with the small one.
Pull the thread from the spool and draw it
into thread guide 11, slot K, thread guide
31, take-up lever 7, thread guide 30 and
the right guide of needle holder 16.
Note on twin needles
For two-needle sewing jobs attach the
second spool holder for the second spool
of thread (page 2).
Both threads are passed through the
thread guides together. However in slot K
one thread is placed above disc L, the
other below
it,
and at needle holder 16,
one thread
is
pulled through the right
guide, the other through the left.
Twin needles are threaded by hand.