PowerTec 1000 User Manual

Model
1000
Installation and Operation Manual
Page
35
OFFICIAL 6/1/2001
WHAT HAPPENS WHEN I …
MAKE AN ADJUSTMENT ON THE MODEL 1000 ?
Once the motor is running, it may be necessary to make adjustments to produce the desired results.
ZERO speed
MAX speed
JOG speed
ACCEL time DECEL time
START
Speed
Pot at
CCW
MIN speed
Speed
Pot to CW
STOP
RAMP
STOP
JOG
ON
JOG
OFF
With a standard speed pot connection (see page 21), the MIN pot on the Speed Controller board is
actually a minimum reference level. When the drive is started in the RUN mode with the speed pot fully
counter-clockwise (CCW, or 0%), the speed reference will be whatever is dialed in on the MIN speed pot.
If the low end of the speed pot is connected to TB2 terminal 12, or if an external reference is used,
the MIN pot has no effect.
If the speed pot is turned to 100% clockwise (CW), or the speed reference is otherwise increased to
+10VDC at TB2 terminal 10, the motor will accelerate to the maximum speed. You may use the MAX pot
on the Speed Controller to adjust the maximum speed of the motor.
Actually, the MAX pot will affect the speed at any speed reference input. The MAX pot adjustment is
not an absolute limit. It is a calibration to the reference.
The amount of time it takes the motor to change from zero speed to maximum speed is adjustable
with the ACCEL pot on the Speed Controller board. The range of time depends on whether or not JP2 is
installed. With JP2 installed, the time for acceleration is adjustable from about 2 seconds (ACCEL pot fully
clockwise) to about 90 seconds (ACCEL POT fully CCW). With JP2 removed, the time is adjustable from
about 0.05 seconds to about 2 seconds.
The ACCEL time is the time it takes the ramp circuit to change the speed reference from zero to full
speed. The motor may not accelerate in the same amount of time if it is limited by inertia or load, in which
case the motor will accelerate in current limit.
When the STOP button is pressed at full speed, if the COAST TO STOP jumper is removed, the
drive will shut off and the motor will coast to a stop. The time it takes the motor to stop is called the “coast
time”. This time is not controlled unless Dynamic Braking is installed.
If the STOP button is pressed and the COAST TO STOP jumper is installed, RAMP STOP mode is
initiated. The speed reference input is clamped to zero after the input at TB2 terminal 10 and the drive
ramps the speed to zero. The drive then shuts off.
The amount of time allowed for the deceleration is adjustable with the DECEL pot on the Speed
Controller board. This time has the same ranges as the ACCEL pot.
The Models 1000 and 1000A are non-regenerative drives, i.e., they have no braking effect. When the
RAMP STOP mode is in operation, or if the speed pot is turned to 0% while running at full speed, the
DECEL time will only be effective if the coast time of the motor (see above) is shorter than the DECEL
time. Otherwise, the motor will coast to a stop. When the motor gets to zero speed, the drive shuts off.
JOG speed is adjustable with the JOG pot on the Speed Controller board. JOG speed is affected by
the MAX speed adjustment, but JOG speed is not affected by the MAX pot, the ACCEL pot, or the DECEL
pot. JOG accelerates in current limit.

PowerTec 1000 Specifications

General

Brand	PowerTec
Model	1000
Category	Controller
Language	English