20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860) 584-1973 http://www.amci.com
Networked Indexer/Driver User Manual
I
NSTALLING
AN
AMCI N
ETWORKED
D
RIVER
95
1.7 Installing the Stepper Motor
1.7.1 Outline Drawings
Outline drawings for all of our motors can be found on our website,
www.amci.com
, in the
PDF Documents
section. They’re available as Adobe Acrobat pdf files. A document that is simply called
wiring
lists all of the
wiring color codes for all AMCI motors. If you do not have internet access contact AMCI and we will fax the
information to you.
1.7.2 Mounting the Motor
All AMCI motor have flanges on the front of the motor for mounting. This flange also acts as a heatsink, so
motors should be mounted on a large, unpainted metal surface. Mounting a motor in this fashion will allow a
significant amount of heat to be dissipated away from the motor, which will increase the motor’s life by
reducing its operating temperature. If you cannot mount the motor on a large metal surface, you may need to
install a fan to force cooling air over the motor.
Motors should be mounted using the heaviest hardware possible. AMCI motors can produce high torques and
accelerations that may weaken and shear inadequate mounting hardware.
1) The motor case must be grounded for proper operation. This is usually accomplished
through its mounting hardware. If you suspect a problem with your installation, such as
mounting the motor to a painted surface, then run a bonding wire from the motor to a solid
earth ground point near it. Use a minimum #8 gauge stranded wire or 1/2" wire braid as the
grounding wire
2) Do not disassemble
any
stepper motor. A significant reduction in motor performance will
result.
1.7.3 Connecting the Load
Care must be exercised when connecting your load to the stepper motor. Even small shaft misalignments can
cause large loading effects on the bearings of the motor and load. The use of a flexible coupler is
strongly
rec-
ommended whenever possible.
1.7.4 Extending the Motor Cable
Even though it is possible to extend the cable length an additional forty feet, AMCI recommends installing
the Networked Driver as close to the motor as possible. This will decrease the chances of forming a ground
loop, and has the added benefit of limiting the amount of power loss in the motor cable. If you must extend
the cable, you should use a cable with twisted pairs 18 AWG or larger and an overall shield. Belden 9554
(eight wire), 9553 (six wire) and 9552 (four wire) meet these specifications for 18 AWG+. For long runs, con-
sider using 14 AWG wire. Belden 1070A (eight wire), 1527A (six wire) and 1069A (four wire) meet these
specifications for 14 AWG.
1.7.5 Installing the Motor Cable
1) All of the motor connections are high power, high voltage signals. Cable from the motor
can be installed in conduit along with ac/dc power lines or high power ac/dc I/O. It cannot
be installed in conduit with low power cabling such as I/O cabling or Ethernet cabling
attached to the Networked Driver.
2) If you decide to extend the motor cable, treat the shield as a signal carrying conductor when
installing the motor cable. Do not connect the shield to earth ground at any junction box.
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