Optima DMC-1xxx and DMC-18x2 Command Reference
LM
i
126
LM
FUNCTION: Linear Interpolation Mode
DESCRIPTION:
The LM command specifies the linear interpolation mode and specifies the axes for linear
interpolation. Any set of 1 thru 8 axes may be used for linear interpolation. LI
commands are used to specify the travel distances for linear interpolation. The LE
command specifies the end of the linear interpolation sequence. Several LI commands
may be given as long as the controller sequence buffer has room for additional segments.
Once the LM command has been given, it does not need to be given again unless the VM
command has been used.
It should be noted that the controller computes the vector speed based on the axes specified in
the LM mode. For example, LM ABC designates linear interpolation for the A,B and C
axes. The speed of these axes will be computed from VS
2
=AS
2
+BS
2
+CS
2
, where AS,
BS and CS are the speed of the A,B and C axes. In this example, If the LI command
specifies only A and B, the speed of C will still be used in the vector calculations. The
controller always uses the axis specifications from LM, not LI, to compute the speed.
The LM command will apply to the selected coordinate system, S or T. To select the
coordinate system, use the command CAS or CAT.
ARGUMENTS: LM nnnnnnnnnn
where
n is A,B,C,D,E,F,G or H or any combination to specify the axis or axes
n = ? Returns the number of spaces available in the sequence buffer for additional LI
commands.
USAGE: DEFAULTS:
While Moving
Yes
Default Value
-
In a Program
Yes
Default Format
-
Command Line
Yes
Controller Usage
ALL CONTROLLERS
OPERAND USAGE:
_LMn contains the number of spaces available in the sequence buffer for the 'n' coordinate
system, S or T.
RELATED COMMANDS:
"LE "
Linear end
"LI "
Linear Distance
"VA "
Vector acceleration
"VS "
Vector Speed
"VD "
Vector deceleration
"AV"
Vector distance
"Error! Reference source not found."
_CS - Sequence counter
EXAMPLES:
LM ABCD
Specify linear interpolation mode
VS 10000; VA 100000;VD 1000000
Specify vector speed, acceleration and deceleration
LI 200,300,400,500
Specify linear distance
LE; BGS
Last vector, then begin motion
