Delta RMC151 User Manual Page 33

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2 Starting Up the RMC
To access the Scale/Offset wizard, in Axis Tools, in the Axis Parameters pane, click the
Setup tab. Expand the Tools and Wizards section. Click Launch to open the
Scale/Offset Wizard.
Note:
Before using the Scale/Offset Wizard, you must define the axes and set the transducer type
parameters.
Manual Calculation
The methods of calculating the scale and offset parameters depends on the axis type. See
the scaling topic for your axis type:
Analog Position Scaling
Analog Velocity Scaling
Analog Acceleration Scaling
Analog Pressure/Force Scaling
MDT Scaling
SSI Scaling
Quadrature Scaling
Resolver Scaling
Rotary Scaling
Scale and Offset Parameters
The following parameters converting the transducer feedback Counts into meaningful
units. Each axis, whether a control axis or reference axis, has these parameters:
Scale
On a linear axis, the Position, Pressure, Force, or Velocity Scale defines the number of
Actual units (position, velocity, pressure or force) per count or volt returned from the
transducer.
Offset
On a linear axis, the Position, Pressure, Force, or Velocity Offset moves the zero point
of the Actual units to where the user wants it.
On a rotary axis, the Position Offset defines the lower range of the position range.
Count Offset
This parameter is used for Absolute Rotary axes to determine where the zero point of
the counts should be.
Position Unwind
On a rotary axis, the Position Unwind defines the span of the position range.
Count Unwind
On a rotary axis, the Count Unwind defines the range of counts over which the Position
Unwind spans.
2.2.2. Analog Position Scaling
To have any useful meaning, the Voltage or Current from an analog transducer must be scaled
to position or velocity units. This topic describes how to manually calculate the Scaling and
Offset parameters for an analog position input.
Delta Recommends using the Scale/Offset Wizard for scaling the position. If you need to do it
manually, read this topic.
Manually Scaling Voltage or Current to Position Units
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