6060 Spine Road
Boulder, CO 80301 USA
USA
Europe
Worldwide
1 800 255 6964
0161 864 6800
303 444 2009
Replacing the X Axis Motor on the GE Autosampler
Introduction
Purpose:
To replace the X axis motor.
Scope:
This procedure applies to all GE Autosamplers.
Safety:
This procedure should be performed by personnel skilled in the maintenance of electromechanical
instruments.
Materials
•
Phillips (crosshead) screwdriver
•
Electrostatic discharge (ESD) protection
•
X Axis Motor Kit
Procedures
A.
Remove the current X axis motor (next section).
B.
Install the new X axis motor (page 5).
A. Remove the Current X Axis Motor
1.
If the GE Analyzer is taking
measurements, press the Stop Analysis
button.
2.
Turn off the Analyzer and the
GE Autosampler, and close the DataPro
software.
3.
Unplug the power cord from the
GE Autosampler and from the wall outlet
or surge protector.
GE Analytical Instruments, Inc. ©2010J
Page 1 of 6
DIN 88008-01 Rev. A
KIT, X AXIS MOTOR, AUTOSAMPLER
GE Autosampler X Axis Motor Kit
4.
Remove the back cover by unfastening
the six securing screws.
5.
Put on the wrist strap that is supplied in
the kit. Put one end of the strap on your
arm and the other end on one of the
GE Autosampler’s metal surfaces.
6.
Disconnect the cable at J1 on the X axis
encoder board.
7.
Using a Phillips screwdriver, remove the
two screws that attach the X axis
encoder bracket with board to the
GE Autosampler’s case. As you remove
the board, pull it downward so the fragile
jaws of the optical sensor clear the
encoder wheel.
Encoder
wheel
Caution: The optical sensor is fragile. Take
care not to damage it.
8.
Place the removed bracket and X axis
encoder board in a safe place.
Optical
sensor
You will reinstall it after you install the
new X axis motor.
GE Analytical Instruments, Inc. ©2010J
Page 2 of 6
DIN 88008-01 Rev. A
KIT, X AXIS MOTOR, AUTOSAMPLER
GE Autosampler X Axis Motor Kit
9.
Remove the top cover by removing the
four screws in the sides and then gently
pulling the top cover forward.
If tubing is present, remove it from the
clip attached to the top cover.
10. Loosen but do not remove the screw that
holds the pulley to the bracket on the
front of the GE Autosampler.
11. Move the pulley toward the back of the
GE Autosampler, and remove the belt
from the pulley.
GE Analytical Instruments, Inc. ©2010J
Page 3 of 6
DIN 88008-01 Rev. A
KIT, X AXIS MOTOR, AUTOSAMPLER
GE Autosampler X Axis Motor Kit
12. Unplug the cable from the motor to the
interconnect board at J4.
13. Remove the bottom two screws from the
motor.
14. While holding the motor, remove the top
screw.
15. Remove the belt from the motor’s pulley
and set the motor aside.
GE Analytical Instruments, Inc. ©2010J
Page 4 of 6
DIN 88008-01 Rev. A
KIT, X AXIS MOTOR, AUTOSAMPLER
GE Autosampler X Axis Motor Kit
B. Install the New X Axis Motor
1.
Remove the new motor and encoder
wheel assembly from their packaging.
Note: The encoder wheel assembly is
shipped in a separate package to prevent
damage.
2.
Line up the setscrew hole on the encoder
wheel assembly with the flat on the new
motor’s shaft and put the encoder wheel
assembly on the shaft.
3.
Use the supplied Allen wrench to install
one of the two setscrews. As you tighten
the setscrew, make sure it hits the flat of
the shaft.
4.
Open the supplied packet of Loctite®.
5.
Place a drop of Loctite® on the thread of
the second setscrew, and install it in the
same setscrew hole on the encoder
wheel assembly.
6.
Mount the new motor by placing the belt
on the motor’s pulley and reinstalling the
three screws.
Setscrew hole
Caution: Make sure the belt is not twisted and
that it is engaged on the pulley.
7.
Reattach the belt to the pulley at the
front of the GE Autosampler by moving
the pulley toward the back and putting
the belt on the pulley.
Caution: Make sure the spring is engaged to
its two hooks. This acts as an auto-tension
mechanism.
8.
Tighten the screw that holds the pulley to
the bracket on the front of the
GE Autosampler.
9.
Plug the motor’s cable into the
interconnect board at J4.
10. Reinstall the top cover by sliding it on and
securing it with four screws.
If tubing was clipped to the top cover,
reattach the tubing to the clip.
GE Analytical Instruments, Inc. ©2010J
Page 5 of 6
DIN 88008-01 Rev. A
KIT, X AXIS MOTOR, AUTOSAMPLER
GE Autosampler X Axis Motor Kit
11. Reinstall the X axis encoder bracket with
board by loosely securing it with two
screws.
Caution: Take care not to damage the fragile
U-shaped optical sensor.
12. Position the encoder wheel as close to
the bottom of the U-shaped optical
sensor as possible – without touching it –
and center the encoder wheel between
the jaws of the optical sensor.
Caution: The wheel should not rub on any
surface of the optical sensor.
13. Fully tighten the screws on the X axis
encoder board bracket.
Optical sensor
14. Reconnect the ribbon cable at J1 on the X
axis encoder board.
15. Position the back cover with the notch at
the GE Autosampler’s base, and reinstall
the back cover by fastening six screws.
16. Plug in the GE Autosampler’s power cord.
17. Power on the GE Autosampler and
observe that it operates as designed.
Watch for error lights and any
unexplained noise.
18. Dispose of removed materials according
to local regulations.
GE Analytical Instruments, Inc. ©2010J
Page 6 of 6
DIN 88008-01 Rev. A
KIT, X AXIS MOTOR, AUTOSAMPLER