C=C+1 Increment
index
JP #L,C<500
Repeat until done
#PLAYBCK Begin
Playback
CMX
Specify contour mode
DT2
Specify time increment
I=0
Initialize array counter
#B Loop
counter
CD XPOS[I];WC
JP #B,I<500
Specify contour data I=I+1 Increment array counter
Loop until done
DT 0;CD0
End contour mode
EN End
program
For additional information about automatic array capture, see Chapter 7, Arrays.
Virtual Axis
The DMC-1600 controller has an additional virtual axis designated as the N axis. This axis has no
encoder and no DAC. However, it can be commanded by the commands:
AC, DC, JG, SP, PR, PA, BG, IT, GA, VM, VP, CR, ST, DP, RP.
The main use of the virtual axis is to serve as a virtual master in ECAM modes, and to perform an
unnecessary part of a vector mode. These applications are illustrated by the following examples.
ECAM Master Example
Suppose that the motion of the XY axes is constrained along a path that can be described by an
electronic cam table. Further assume that the ecam master is not an external encoder but has to be
a controlled variable.
This can be achieved by defining the N axis as the master with the command EAN and setting the
modulo of the master with a command such as EMN= 4000. Next, the table is constructed. To
move the constrained axes, simply command the N axis in the jog mode or with the PR and PA
commands.
For example,
PAN
=
2000
BGN
will cause the XY axes to move to the corresponding points on the motion cycle.
Sinusoidal Motion Example
The x axis must perform a sinusoidal motion of 10 cycles with an amplitude of 1000 counts and a
frequency of 20 Hz.
This can be performed by commanding the X and N axes to perform circular motion. Note that
the value of VS must be
VS=2
π
* R * F
where R is the radius, or amplitude and F is the frequency in Hz.
Set VA and VD to maximum values for the fastest acceleration
INSTRUCTION
INTERPRETATION
VMXN
Select
axes
VA
68000000
Maximum
Acceleration
100
•
Chapter 6 Programming Motion
DMC-1600
