5-10 Operation
MN1957
www.baldormotion.com
5.4.2 Selecting a scale
Mint defines all positional and speed related motion keywords in terms of encoder
quadrature counts (for servo motors). The number of quadrature counts is divided by the
SCALEFACTOR
allowing you to use units more suitable for your application. The unit defined
by setting a value for scale is called the user unit (uu).
Consider a motor with a 1000 line encoder. This provides 4000 quadrature counts for each
revolution. If
SCALEFACTOR
is not set, a Mint command that involves distance, speed, or
acceleration may need to use a large number to specify a significant move. For example
MOVER(0)=16000
(Move Relative) would rotate the motor by 16000 quadrature counts -
only four revolutions. By setting a
SCALEFACTOR
factor of 4000, the user unit becomes
revolutions. The more understandable command
MOVER(0)=4
could now be used to move
the motor four revolutions.
In applications involving linear motion a suitable value for
SCALEFACTOR
would allow
commands to express values in linear distance, for example inches, feet or millimeters.
1. In the Toolbox, click the Parameters icon.
2. Click the Scale tab.
3. Click in the Axis drop down box to select the axis.
Each axis can have a different scale if required.
4. Click in the
SCALEFACTOR
box and type a value.
5. Click
Apply
.
This immediately sets the scaling factor for the
selected axis. It will remain in the NextMove ESB-2
until another scale is defined, or power is removed.
Servo Systems Co. • 115 Main Road • P.O. Box 97 • Montville, NJ,
07045-0097 • (973) 335-1007 • Toll Free: (800) 922-1103
Fax: (973) 335-1661 • www.servosystems.com
