14
8) Location Detector Assembly and
Adjustment
(1) Installing the location detector
A. Installing on the servo motor (in-built location detector)
A location detector sensor is attached to the back side of
the arm. The appropriate clearance between the location
detector and the pulley is 0.5mm. (See Fig. 11)
After assembling the parts in the numbered order as in Fig. 12, adjust the synchronization shaft horizontally such that the
photo film is placed at the center of the photo interrupter as in Fig. 13. Then fasten it tightly with two fixing screws using
a hexagonal wrench.
[Caution]
Assemble after adjusting the position such that the letters
“
UP
”
and
“
DOWN
”
are facing the front side when
seen from the pulley as is shown in Fig. 12.
The film will already be adjusted by default.
(2) Installing the 470 motor
9) Location Adjustment of Location Detector
(1) For in-built location detectors
For the needle bar's upper stop position setting, loosen the tightening screw
①
on the side of N
·
U punched mark of the
pulley and set the white punched mark
③
of the pulley in parallel with the punched mark of the arm
④
at the desired
upper stop position by moving the screw sideways. For the needle bar's lower stop position setting, loosen the tightening
screw
②
on the side of N
·
D punched mark of the pulley and set the needle bar to stop at 2.5mm~3.0mm above from the
needle bar's lowest position as the lower stop position by moving the screw sideways. (see Fig. 14 and Fig. 15)
Speed Sensor Film
Fixed Washer
Fixed Bushing
Fixed Screws
Pulley
L Wrench
PCB Holder
COVER
Photo
Interrupter
Photo Film
Synchronization Shaft
Synchronization Shaft Fixed
Screws (2)
Location
Detector
Shaft
Fixed
Washer
Clearance-Adjusting Bushing
Up-Stop
Position
Down-Stop
Position
[Fig.11]
[Fig.12] [Fig.13]
[Fig.14]
[Fig.15]
Keystone Sewing Machine Company, Inc.
