Galil DMC-3425 Manual De Usuario
DMC-3425
Chapter 6 Programming Motion
• 83
For example, assume that a gantry is driven by two axes, A and B, one on each side. This requires the
gantry mode for strong coupling between the motors. The A-axis is the master and the B-axis is the
follower. To synchronize B with the commanded position of A, use the instructions:
gantry mode for strong coupling between the motors. The A-axis is the master and the B-axis is the
follower. To synchronize B with the commanded position of A, use the instructions:
GA, CA
Specify the commanded position of A as master for B.
GR,1
Set gear ratio for B as 1:1
GM,1
Set gantry mode
PR 3000
Command A motion
BG A
Start motion on A axis
You may also perform profiled position corrections in the electronic gearing mode. Suppose, for
example, that you need to advance the slave 10 counts. Simply command
example, that you need to advance the slave 10 counts. Simply command
IP ,10
Specify an incremental position movement of 10 on the B axis.
Under these conditions, this IP command is equivalent to:
PR,10
Specify position relative movement of 10 on the B axis
BGB
Begin motion on the B axis
Often the correction is quite large. Such requirements are common when synchronizing cutting knives
or conveyor belts.
or conveyor belts.
Example - Synchronize two conveyor belts with trapezoidal velocity correction.
Instruction Interpretation
GA,A
Define A as the master axis for B.
GR,2
Set gear ratio 2:1 for B
PR,300 Specify
correction
distance
SP,5000 Specify
correction
speed
AC,100000 Specify
correction acceleration
DC,100000 Specify
correction deceleration
BGB Start
correction
Electronic Cam (Local Mode)
The electronic cam is a motion control mode that enables the periodic synchronization of several axes
of motion. Similar to the gearing mode, the DMC-3425 uses only A and B main axes as the master or
slave.
of motion. Similar to the gearing mode, the DMC-3425 uses only A and B main axes as the master or
slave.
The electronic cam is a more general type of electronic gearing which allows a table-based relationship
between the axes. It allows synchronizing all the controller axes.
between the axes. It allows synchronizing all the controller axes.
To illustrate the procedure of setting the cam mode, consider the cam relationship for the slave axis B,
when the master is A. Such a graphic relationship is shown in Figure 6.4.
when the master is A. Such a graphic relationship is shown in Figure 6.4.
Step 1. Selecting the master axis
The first step in the electronic cam mode is to select the master axis. This is done with the instruction
EAp where p = A,B
p is the selected master axis
For the given example, since the master is a, we specify EAA
Step 2. Specify the master cycle and the change in the slave axis (es).