Thread Catcher - Position - Pfaff 3339 Instruction Manual

11.
16.02

Thread catcher - position

Requirement
1. With crank 6 touching the lower arm moulded wall, the thread catcher 4 must just be
touching the needle.
2. With the thread catcher 4 in start position, there must be a clearance between the
catcher point and the needle of 4 mm.
3. The thread catcher 4 must be able to pass between knife 9 and bobbin thread puller 10
without touching anything.
4
Fig. 11 - 20
Bring the needle bar to its b.d.c. by turning the V-belt wheel. Ensure that pin 3 of the
control cam 1 (see Fig. in chapter 11.16.03) is dropped.
Loosen screw 2 just enough so that the thread catcher 4 can be turned on its shaft with
difficulty.
Press connecting rod 5 to the left until crank 6 is touching the lower arm moulded wall
and hold it there.
Pivot thread catcher 4 back in in accordance with requirement 1.
While observing requirement 3, tighten screw 2. Upon letting go of the connecting rod the
thread catcher must fall back to start position.
Turn set screw 7 (nut 8) in accordance with requirement 2.
Raise pin 3 with its activating lever (see Fig. in Chapter 11.16.03 and bring the machine
into program end position by turning the V-belt wheel backwards.
The machine must be in program end position.
2 6
7
8
4
5
Adjustment
9
1 0
4 mm
11 - 21