Location Detector Assembly And Adjustment; Location Adjustment Of Location Detector - SunStar KM-250 Series User Manual

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)
(2) Installing the 470 motor
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.
Speed Sensor Film
Location
Fixed Clearance-Adjusting Bushing
Detector
Shaft Washer

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
pulley and set the white punched mark
upper stop position by moving the screw sideways. For the needle bar's lower stop position setting, loosen the tightening
screw 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)
14
Fixed Washer
Fixed Bushing
Fixed Screws
[Fig.12]
of the pulley in parallel with the punched mark of the arm
[Fig.14]
Keystone Sewing Machine Company, Inc.
Pulley
L Wrench
Synchronization Shaft Fixed
Screws (2)
Synchronization Shaft
Photo Film
COVER
PCB Holder
on the side of N U punched mark of the
at the desired
Up-Stop
Position
[Fig.11]
Photo
Interrupter
[Fig.13]
Down-Stop
Position
[Fig.15]