Baldor NextMove ESB-2 Installation Manual page 70

The analog demand output is controlled by a 12-bit DAC, which can create output voltages in
the range -10 V to +10 V. This means a maximum output of +10 V corresponds to a DAC
value of 2048. The value of KVELFF is calculated by dividing 2048 by the number of
quadrature counts per servo loop, so:
KVELFF
5. Click in the KVELFF box and enter the
value.
The calculated value should give zero
following error at constant velocity. Using
values greater than the calculated value
will cause the controller to have a following
error ahead of the desired position. Using
values less than the calculated value will
cause the controller to have following error
behind the desired position.
6. In the Move Type drop down box, check
that the move type is set to Trapezoid.
7. Click in the Distance box and enter a
distance
recommended to set a value that will cause
the motor to make a few revolutions, for
example 10.
Note: The distance depends on the scale set in section 5.4.2. If you set a scale so that
units could be expressed in revolutions (or other unit of your choice), then those
are the units that will be used here. If you did not set a scale, the amount you
enter will be in encoder counts.
8. Click Go.
The NextMove ESB-2 will perform the move and the motor will turn. As the soon as the
move is completed, Mint WorkBench will upload captured data from the NextMove ESB-2.
The data will then be displayed in the Capture window as a graph.
Note: The graph that you see will not look exactly the same as the graph shown here!
Remember that each motor has a different response.
Servo Systems Co. • 115 Main Road • P.O. Box 97 • Montville, NJ,
MN1957
07045-0097 • (973) 335-1007 • Toll Free: (800) 922-1103
= 2048 / 200
= 10.24
for the step move.
Fax: (973) 335-1661 • www.servosystems.com
It is
www.baldormotion.com
Operation 5-25