Galil Motion Control optcom Page 221
Optima DMC-1xxx and DMC-18x2 Command Reference
VT
i
210
VT
FUNCTION: Vector Time Constant - S curve
DESCRIPTION:
The VT command filters the acceleration and deceleration functions in vector moves of VM,
LM type to produce a smooth velocity profile. The resulting profile, known as
Smoothing, has continuous acceleration and results in reduced mechanical vibrations.
VT sets the bandwidth of the filter, where 1 means no filtering and 0.004 means
maximum filtering. Note that the filtering results in longer motion time.
ARGUMENTS: VT s,t
where
s and t are unsigned numbers in the range between 0.004 and 1.0, with a resolution of 1/256.
The value s applies to the S coordinate system and t applies to the T coordinate system.
s = ?
Returns the value of the vector time constant for the S coordinate plane.
t = ?
Returns the value of the vector time constant for the T coordinate plane.
USAGE: DEFAULTS:
While Moving
Yes
Default Value
1.0
In a Program
Yes
Default Format
1.4
Command Line
Yes
Controller Usage
ALL CONTROLLERS
OPERAND USAGE:
_VTn contains the vector time constant for the specified coordinate plane.
RELATED COMMANDS:
"IT "
Independent Time Constant for smoothing independent moves
EXAMPLES:
VT 0.8
Set vector time constant for S coordinate system
VT ?
Return vector time constant for S coordinate system
0.8
