Moog DS2100 User Manual Page 271

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SECTION 7: CANOPEN DRIVE PROFILE : DS402 DS2100 User’s Manual
C27750-001 PAGE 7-17
7.11 Factors Group
A group of parameters are defined in DS402 for scaling between physical units used by the user, and the internal
units of the drive. The group consists of two sets of parameters. These consist of a set of input parameters, which
when combined, generate a set of output factors / parameters. The input parameters include notation and dimension
indices, position and velocity encoder resolutions, feed constant, and gear ratio.
A notation index indicates the power of ten, relating to the specific index. (e.g. 2 => 10
2
)
A dimension indicates the SI unit relating to the specific index. (e.g. radians, degrees, etc...)
The outputs factors are used to scale from various physical units to internal units, as shown in the diagram below: -
Position Factor
Physical Units Internal Units
Position Units Increments (Inc)
+/-1
Feed Constant
Position Encoder Resolution
Gear Ratio
Velocity Encoder Resolution
Notation Index * 3
Dimension Index * 3
Inputs
Velocity Units Increments/Sec
*
+/-1
Velocity Polarity
Acceleration
Units
Increments/Sec
2 *
Inc (Position) Inc (Velocity)
RPM
Increments/Sec
*
Velocity Factor 2
Velocity Encoder
Factor
Acceleration
Factor
Velocity Factor 1
Input
Output
Output
Output
Output
Output
Position Polarity
* Internally convert from seconds to Tsamp
Figure 7.7 Factor Group overview.
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