Parker Compumotor - Initial Functional Check

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FUNCTIONAL CHECK
LE-Series Operator's Manual
FUNCTIONAL CHEn
In order to make a functictnal .:hec!< of the LE-Drive it i8
flecessary to first at-:1ach motor, indexer and power leads to it as
~~xplained in the installation and hookup section, below. The
indexer need not be used for an initial test. A square-wave
generator may be attached to the Indexer inputs instead.
JJsing .!. square-wave gene..E~ instead.£!..!!!. indexer.
The positive or "hot" lead of the square-wave generator should be
.!lttached to the STEP+ input on LE-Dri vee Ground from the
frequency generator should be attached to STEP-. The output of
the square-wave generator should be set to.3 volts peak. There
1s an 82 ohm resistor and LED in series between the STEP+ and
STEP- inputs. The current through these components should not
exceed 20 IDA for reliable operation.
To verify that the LE-Drive is operating properly,
1. Attach the motor cable to the LE-Drive. Be sure the
motor shaft is free to rotate.
2. Apply power to the LE-Drive (115 VAC) and apply a
one
kHZ square wave to the STEP inputs. This will
cause a 25,000 steps per revolution motor to rotate at
the rate of one revolution every 25 seconds in the
counter-clockwise direction.
3. All other inputs may be left unconnected.
By increasing the frequency of the square wave you 107111 increase
the rotational velocity of the motor. The motor should be able to
accept up to 125 kHZ (5 RPS) without stalling provided the motor
has not been accelerated too quickly.
The direction of the motor can be changed by putting 20 mA of
current through the DlRECTION+ and DlRECTION- inputs. Three
volts applied to DIRECTION+ and signal ground applied to
DlRECTION- will cause the motor to rotate in the clockwise
direction. The motor will not be able to reverse direction
instantly, however, it is necessary to slow the motor to less
than one-half rev per second to allow a direction reversal
without stalling the motor.
Checkout of the OVERDRIVE and SHUTDOWN inputs are not considered
a portion of the basic functional checkout of the LE-Drive.
These are covered under the Operation section of this manual.
Compumotor
p. 3
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