4 .3.1 Regulator Module Pots - The Regulator Module
has six adjustable potentiometers mounted on it. (Refer to
Figure 4 .1 .) They control the following functions :
• Maximum speed (full CCW: 50% speed)
• Min imum speed (full CCW: zero speed)
• Acceleration rate (full CCW)
• Deceleration rate (full CCW)
• Current limit (factory-set at 150%)
• IR comp (full CCW)
The potentiometer s are factory preset for the safest or most
conservative operation .
4.3.2 Maximum Speed (Voltage) - The Maximum Speed
Potentiometer on the Regulator Module has been factory
preset for 50% of a typical motor base speed of about 1750
rpm . By means of adjustment, the maximum speed may be
raised to suit the application. The result is the highest
speed that can be set by the operator on the SPEED dial.
The control range is 50 to 100% of rated speed.
There are two methods for determining if the motor and
driven equipment are operating at an acceptable maximum
speed for the application.
• Tachometer
• Visual inspection of machine operation
Locate the Max imum Speed Potentiometer on the Regula-
tor Module . (Refer to Figure 4 .1.) The
latters MAX SPD are
printed on the Module . Note that CW rotat ion represents an
increase in speed. CCW represents a
decrease.
Max Speed
Min Speed
Ace Rate
Deel Rate
Currant Limit
IR Comp
Figure 4 .1 - Regulator Module Potentiometers
16
DANGER
WHEN PERFORMING THIS ADJUSTMENT PRO-
CEDURE , DO NOT ALLOW
THE DRIVE MOTOR TO
EXCEED ITS RATED MAXIMUM SPEED, AS
LISTED ON
THE NAMEPLATE . EQUIPMENT
DAMAGE AND SERIOUS PERSONAL INJURY
COULD RESULT.
On the Operator Station , increase the SPEED dial slowly in
the direction of 10, which is 100% of full travel. If, as the
SPEED dial is turned toward the 10 setting, the speed
exceeds the maximum acceptable speed,
immediately
decrease the maximum speed on the SPEED dial. Use a
small insulated slot screwdriver.
In
some cases, to avoid exceeding the maximum operating
speed, it may be necessary to turn the Maximum Speed
Potentiometer completely CCW before turning the SPEED
dial completely CW.
If the 1 Osetting on the SPEED dial is lower than the desired
speed, increase the setting on the Maximum Speed Poten-
tiometer to the necessary speed . To increase the max imum
speed, turn the potentiometer CW.
DANGER
USE ONLY ONE HAND
TO HOLD THE SCREW -
DRIVER. KEEP YOUR
OTHER HAND BEHIND
YOU. DO NOT
USE YOUR OTHER HAND TO
BRACE YOURSELF AGAINST THE CONTROLLER,
PANEL OR
ENCLOSURE . PERSONAL INJURY
COULD RESULT IF YOU ACCIDENTALLY TOUCH
A COMPONENT AT LINE VOLTAGE .
NOTE: A further adjustment may be needed, but it should
be performed after completing Paragraph 4.3.3. Note that
the maximum and minimum speed adjustments are inter-
active; a change in one affects the other.
4.3 .3 Minimum Speed (Voltage) - The Minimum Speed
Potent iometer on the Regulator has been factory preset for
zero speed. By means of adjustment, this speed may be
raised or lowered . The result is the lowest moving speed
the operator can set on the SPEED dial. The control range is
zero to 50% of rated speed.
Again , the motor speed can be determ ined by a tachometer
or by visual inspection of machine operation .
With the SPEED dial at zero position and using a small,
insulated slot screwdriver, carefully turn the Minimum
Speed Potentiometer until the desired minimum is
reached . Note that CW represents an
increase; CCW
represents a
decrease.
NOTE: Carefully recheck the maximum speed adjustment
for desired setting . Since the maximum and minimum
speed adjustments are interactive , a change in one affects
the other . At times , it may be neces sary to work back and
forth for precise adjustments.
4.3 .4 Acceleration and Deceleration Rates - The
Acceleration and Deceleration Rate Potentiometers on the
Regulator Modul e have been factory preset for a typical
linear acceleration rate of six seconds to maximum and
minimum speed . This time can be adjusted over a range of
0.5 to 30 seconds from a fully stopped condition.
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