318
G R A H A M M O T O R S A N D C O N T R O L S V A R I S P E E D
®
A 2 0 0 0R E L I A B I L I T Y + C O M P A T I B I L I T Y S I N C E 1 9 3 5
APPLICATION DATA
(Clockwise increases compensation)
If tachometer feedback is used, be sure that this adjustment is set
fully counter-clockwise. IR Compensation should not be used with
tachometer feedback.
This adjustment is provided to overcome the motor’s natural
tendency to slow down with increasing load. If improved
load/speed performance is required, this adjustment may be used.
NOTE: In order to optimize performance with this adjustment,
some means of determining motor shaft speed is required. (i.e.,
hand held tachometer).
1. Set motor speed to 1/2 of base speed rating or to the speed
where the greatest accuracy is required and motor load to
minimum.
2. Load motor to 100% nameplate rating.
3. Turn IR COMP clockwise until motor returns to original
unloaded RPM.
4. Turn off load and notice if RPM increases beyond original
setting. If so, adjust trimpot while changing from no load to full
load to give minimum RPM change for each.
NOTE: Setting IR COMP too high can cause motor speed
instability, Turn IR COMP pot counter-clockwise until motor speed
stability is achieved.
Acceleration (ACCEL)/Deceleration DECEL Adjustments
Set these two trim pots for desired times. Both ACCEL and DECEL
trim pots adjust from 1/2 to 5 seconds. Acceleration time may be
extended with I-LIM if reflected inertia is high. DECEL may also be
longer if reflected inertia is high.
Service Factor
Duty
Overload Capability
Speed Regulation
Speed Range
Potentiometers
Process Signal Input
Adjustments
Elevation
Ambient Temperature
AC Line Voltage Variation
AC Line Frequency
IR COMPENSATION ADJUST
>>
OPERATING CONDITIONS
>
- 1.0
- Continuous
- 150% for 1 minute
- Armature Feedback
±2% Base Speed (for 95% Load Change)
- Tachometer Feedback
±1/2% Set Speed (for 95% Load Change)
- Armature Feedback
50:1 @ Full Torque
- Tachometer Feedback
200:1 @ Full Torque
- 5K Ohm, 1W potentiometer supplied with
ease control
- 0-10V
- Min. Speed (0-50% of motor base speed)
- Max. Speed. (50-100% of motor base
speed)
- IR Comp. (0-25% of rate output)
- Current LIM. (10-15-% of Cntrl. Rating)
- Acceleration ( 1/2-5 Seconds)
- Deceleration ( 1/2-5 Seconds)
- Up to 3300 feet (1000 meters)
without derating
- Chassis: 32 - 131˚F (0-55˚C)
- NEMA 12: 32-104˚F ( 0-40˚C)
- Rated Voltage ±10%
- 48 to 62 Hz
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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