Timing Belt Tension - Baby Lock Mid-Line Machines Technical Training Manual

Adjustment
[Standard]
3.5 ±0.5 mm (3 to 4 mm) slack should be made by pushing the timing belt at the middle of
upper shaft pulley shaft and tension pulley shaft with a force of 1.96 N (200 gf).
[Adjustment]
1. Remove the front cover assy and the rear cover. (Refer to
2. Remove the 3 screws A and screw B of the main PCB assy to remove it from the
machine.
3. Loosen the screw C of the tension pulley assembly.
4. Move the tension pulley assembly back and forth to adjust the tension of the timing belt.
5. Tighten the screw C of the tension pulley assembly to secure the tension pulley assembly to the arm bed.
XC2277001

Timing belt tension

Push pull gauge (5N)
Main PCB assy
Screw A
Screw B
Screws A
1.96 N (200 gf)
Screw C
4 - 5
31
"2-7" / "2-8".)
Timing belt
3.5 ±0.5 mm
(3 - 4 mm)
Tension pulley assembly
Screw A
Screw, Bind M4X8
Screw B
Screw, Bind M3X25
Screw C
Screw, Pan (S/P washer) M4X10
Upper shaft
pulley
Tension pulley