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MDS-D-SVJ3/SPJ3 Series Specifications Manual
3-1 Base functions
3-1-3 Speed command synchronous control
This is one of the controls which enable two servo motors to drive the same axis. This is also called "Speed
tandem control".
The same position command is issued to the 2-axis servo control, and the control is carried out according to
each axis' position and speed feedbacks.
This function is usually used when the control is performed with one linear scale during the full closed loop
control.
<Features>
(1) The position commands in which machine's mechanical errors (pitch error, backlash, etc.) have
been compensated, can be output to each axis.
(2) Each axis conducts independent position control, therefore the machine posture can be kept
constant.
(3) Deviation between the two axes is always monitored, and if excessive, the alarm is detected
3-1-4 Distance-coded reference position control
This is the function to establish the reference point from axis movements of the reference points using a
scale with distance-coded reference mark.
Since it is not necessary to move the axis to the reference point, the axis movement amount to establish the
reference point can be reduced.
No dog is used as the position is calculated using reference marks. This function can not be used for the
linear servomotor and direct-drive motor.
If the distance-coded reference check function is used to verify the motor end detector data, select a battery
option before setting the parameter.
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M
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CNC
Same position command
Program
Compen
-sation
Position
control
Position
control
Speed
control
Speed
control
Current
control
Current
control
Detector
Detector
Primary axis
Secondary axis
Same position FB
Same speed command