Mitsubishi Electric M800VS Series Connection And Set Up Manual page 569

M800VS/M80V Series Connection and Setup Manual
30 Synchronous Control and Multiple-axis Synchronization Control
30.1 Synchronous Control
 Position alignment without using reference position adjustment value
[When synchronization at zero point establishment (#1493 ref_syn) is "0" (asynchronous)]
(1) Select the correction mode, and feed the master and slave axes using the manual handle to correct the error between the
two axes. Use an instrument such as a level to detect horizontal level errors between the synchronous axes.
(2) Adjust the dog position. Adjust the dog position so that the return position is always the same at reference position return.
(3) Change back to synchronous mode, and carry out manual dog-type reference position return. Make sure to decelerate
enough before carrying out reference position return. When the master and slave axes individually decelerate and reach
zero point after the master axis' dog ON, adjust each axis' reference position shift distance (#2027 G28sft) so that there is
no error between the two axes.
[When synchronization at zero point establishment (#1493 ref_syn) is "1" (synchronous)]
(1) Set "#2036 slv_adjust" (reference position adjustment value) to "0".
(2) From the PLC, turn ON the master and slave axis bits of the "synchronous control operation method" signal to select syn-
chronous operation in "synchronous control mode".
(3) Carry out zero point return manually. The master axis travels until reaching the second grid after dog OFF, and stops on
the grid. (If the deceleration after dog OFF goes over the 1st grid, the master axis will stop on the 3rd grid) The slave axis
travels in synchronization with the master axis.
(4) When necessary, adjust the zero point using the reference position shift distance (#2027 G28sft). Set the reference posi-
tion shift distance to the master axis' parameter. The slave axis value is ignored.
Position alignment after power ON
Normally, positions of the master and slave axes deviate at power ON, thus the position alignment for this deviation is
required.
This position alignment is automatically done at the first dog-type reference position return after power ON. However, the
settings of the zero point return parameters such as the reference position shift distance must be adjusted correctly.
Synchronous error check is not carried out until this position alignment is done.
Below is an example of reference position return.
Master axis
Slave axis
Grid
IB-1501613-A
(G28sft)
Master axis's
reference position
shift distance
Basic point
(G28sft)
Slave axis's
reference position
shift distance
Reference position
538