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Custom CMTS Cart
All of the components mentioned above are mounted on
a versatile cart made from extruded aluminum which is
lightweight, sturdy and corrosion-resistant. A special
clamping bridge is added to hold the motor under test
firmly in place. The cart rolls on large 5" casters
which can be locked in place when at rest and in operation
through a spring-loaded rubber foot pad. With the variable
transformer mounted in the base of the cart, the entire
system is self-contained. If needed, the CMTS accepts
50 and 60 Hz input from external sources.
Coupling
 The
coupling supplied with this CMTS provides an easy connection
from the shaft of the motor to the dynamometer. The
motor engages the coupling using a flat-sided shaft
that, when matched up, simply slides in with no tools
required. The coupling is designed with a custom-machined,
heat-treated tool steel bushing adapter. There are bushing
adapters supplied for three different threaded shaft
motors. Fiber washers are used to prevent seizing.
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Magtrol's
custom adjustable motor fixture is used to hold a motor
in place while running a test. It accommodates 4" to 8"
diameter motors, while maintaining a 9" center height
with auto center capability. Dual jaw slides separate
axially, allowing the fixture to house motors up to 18"
long. Each jaw slide adjusts independently for centering
odd-shaped motors. When using a symmetrical motor, dual
scales provide reference for fast alignment of jaws. Nylon
pads are used on the jaws to offer protection against
scratches to the motor. To secure the motor, an adjustable
DE-STA-CO clamp is used. The flat-cushion spindle comes
with a neoprene tip for scratch-free clamping with medium
force. The assembly includes two jam nuts for easy adjustment.
