Simple Synchronous Control; Zero Point Establishment During Simple Synchronous Control; Parameter Setting For Synchronous Control - Mitsubishi Electric M800VS Series Connection And Set Up Manual

M800VS/M80V Series Connection and Setup Manual
30 Synchronous Control and Multiple-axis Synchronization Control
30.1 Synchronous Control

30.1.3 Simple Synchronous Control

Simple synchronous control is an extension of the synchronous control function. This function enables an axis to be
synchronized with the axis previously defined as master axis for the synchronous control, and another axis to be synchronized
with the slave axis. Backlash can be restrained by distributing load torque imposed on one axis to two servo motors. When the
synchronous control and the simple synchronous control are combined, one axis can be driven with four servo motors. An
axis to be synchronized with is referred to as a "main axis" and an axis which follows the main axis is referred to as a "sub
axis".
This is a control method in which the main axis and the sub axis are controlled in the same position by executing a position
command for the main axis to the sub axis as well.
 The sub axes can be set only for the master axis and the slave axis for the synchronous control.
 The sub axis is controlled with the movement command for the main axis.
 Only one sub axis can be set for the main axis.
 The main axis and the sub axis are controlled at the same position. Therefore, the main axis and the sub axis can only be
used together, while either of the axes can be used singly for single operation and correction mode for the synchronous
control.
 For simple synchronous control, synchronization error between the main axis and the sub axis is not monitored.
 For the main axis and the sub axis, specify the speed command synchronous control or the current command synchronous
control.
[Example of using simple synchronous control]
Slave axis
(Main axis)
U
W
Sub axis
Table

30.1.3.1 Zero Point Establishment During Simple Synchronous Control

There are following regulations and cautions regarding the zero point establishment during simple synchronous control.
 For the absolute position detection method (#2049 type), set to "2" (Marked point alignment method I) or "4" (Marked point
alignment method II).
 Apply the same absolute position detection method (#2049 type) to the main axis and the sub axis.
 When the reference point establishment is performed for the master axis and the slave axis (main axis) in accordance with
the zero point initial setting, the reference point for the sub axis is established at the same position.
 The absolute position setting is not available in the sub axis. If "#0 Abs pos set" of the sub axis is set to "1" in the
"ABS.POSITION SET" screen, a "Setting error" will occur.
 If either the main axis or sub axis issued absolute position detection alarm (Z70 0003), the, same error will occur to the
other axis.

30.1.4 Parameter Setting for Synchronous Control

To carry out synchronous control, it is necessary to set the synchronous axes names and the allowable synchronization error
value.
There is a restriction in the settings of the slave axis's axis parameters.
For details, refer to "Synchronous Control Specifications Manual" (BNP-C3072-074).
Synchronous control
Simple synchronous
control
Simple synchronous
V Sub axis
Servo motor
Movement
commands
Master axis
(Main axis)
X
Drive unit
control
545 IB-1501613-A