Table of Contents
Advertisement
8-6. Belt Tension Adjustment of the machine head drive system
Lower figure shows the drive transmission route of machine motor. Drive with motor is transmitted to the
intermediate lower shaft via V belt and divided there to 2 lines of upper and lower shafts. Timing belt A
transmits the drive to the intermediate upper shaft and the upper shaft, which is connected with the
coupling, drives the needle bar. A detector is provided at the rear part of intermediate shaft in order to
detect the rotation angle and number of revolutions of upper shaft. (See the Section 9-5. for further
detail.)
On the other hand, the drive of motor is directly transmitted to the lower shaft by means of the timing belt
B so as to drive the hook.
To upper shaft of arm
To lower shaft
of bed
Tension pulley E
8-6-1. Adjustment of the upper shaft timing belt tension
(1) Remove the cover of main unit frame (column).
(2) Move the tension pulley C in the arrow D direction and adjust the tension so that the timing belt A is
not warped with a light pressing.
Intermediate upper shaft
Machine motor
Coupling
F
Timing belt B
D
Intermediate lower shaft
- 28 -
Detector
Tension pulley C
Timing belt A
V belt
Advertisement
Table of Contents
