Hiwin D1-N Series - Error Compensation

D1-N Series Servo Drive User Manual Operation Principles
HIWIN MIKROSYSTEM Corp. 3-13
MD17UE01-1906
3.8 Error compensation
Normally the positioning accuracy of a servo drive is decided by encoder. When an encoder cannot meet
users’ requirement for accuracy, users may use equipment with higher accuracy level (such as laser
interferometer) to measure system error. Then, as figure 3.7.1, D1-N servo drive is able to store system
error in its error map and calculate error compensation value by means of linear interpolation between
fixed distances to enhance positioning accuracy.
Figure 3.8.1
The effective range of error compensation is determined by index signal. Error compensation is effective
only in the forward direction of index signal. If home offset is applied, the effective range of error
compensation is still the same.
(1) When home offset is set to 0
Figure 3.8.2
D1-N
Servo
Drive
Motor
Controller
Encoder Feedback Position Input
Error Map
Motor Power
Feedback Position Output
Pulse Command Input
Effective range of error compensation
+ Position
index
Servo drive coordinate = 0