SAFTRONICS
4
•••••
RV1 +12V reference
This factory preset adjustment will very seldom need adjustment.
It is used to match the +12 volt reference supply to the -12 volt
supply.
•••••
RV2 Current stability
This control, which has been factory preset, adjusts the stability
of the current loop. The normal position of this trimpot is
approximately 1/2 turn clockwise.
•••••
RV3 Acceleration/Deceleration
This control adjusts both acceleration and deceleration time. In
the fully clockwise position, acceleration/deceleration time is 0.1
seconds, and in the fully counterclockwise position, acceleration/
deceleration time is 30 seconds.
•••••
RV4 Maximum speed
This adjustment is used to set the maximum armature voltage or
motor speed.
•••••
RV5 Zero speed offset
This adjustment is used to minimize creeping of the motor with the
speed reference set to "zero".
•••••
RV6 IR Compensation
Factory set to CCW for Tach Feedback, this control rarely needs
to be used. However, when using armature voltage feedback with
cyclical loading applications where there is a speed drop due to
operation from high to low load, the “IR Comp” adjustment
corrects for voltage changes inside the DC motor when load is
applied. If speed variations with load are a problem, set the
“SPEED” control knob to the desired operating speed. Now load
the drive. Adjust RV6 until the motor speed returns to its
unloaded speed. Remove the load and ensure motor speed is
stable.
•••••
RV7 Voltage stability
This is factory preset and very seldom needs adjustment. If the
motor should hunt, rotate this trimpot until the motor runs
smoothly. The normal position of this trimpot is approximately
1/2 turn clockwise.
•••••
RV8 I Forward
This adjustment is factroy preset for the maximum allowable DC
current in the forward motoring direction. This trimpot will adjust
the current limit setting from 20 - 150% of the drive rating.
•••••
RV9 I Reverse
This adjustment is factroy preset for the maximum allowable DC
current in the reverse motoring direction. This trimpot will adjust
the current limit setting from 20 - 150% of the drive rating.
2.4 Adjustments
CAUTION: Adjusting RV6
to over 50% clockwise rota-
tion, may cause drive insta-
bility which cannot be cor-
rected by RV7 voltage sta-
bility. In such a case, back
off slightly from the posi-
tion where RV6 causes in-
stability. This may result in
a slight decrease in speed
holding.
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