Pfaff 2170 - Manual (Page 33)

2:15
Pr
epar
ations
Bobbin thread
Raise the presser foot. Insert the bobbin case and place the thread to the
left (see picture). Close the hook/bobbin door. Place the fabric under
the presser foot and start to sew. The machine will pull the thread up
by itself.
Threading the twin needle
Replace the sewing needle with a twin needle.
Swing the second spool holder up and lock. Place a spool of thread
with an appropriate spool cap on it. Make sure that both threads are
placed underneath the bobbin winder thread guide. During threading
in the left threading slot, make sure that you pass one thread to the
left and one thread to the right sides of the tension disk (A). Continue
threading in the usual manner, making sure the threads do not become
twisted together.
Pull the right thread into the right thread guide and thread the right
needle. Pull the left thread into the left thread guide and thread the left
needle.
It is not possible to use the automatic needle threader with a twin
needle.
A