DMC-40x0 Command Reference IT • 135
IT
FUNCTION: Independent Time Constant - Smoothing Function
DESCRIPTION:
The IT command filters the acceleration and deceleration functions of independent moves such as
JG, PR, PA to produce a smooth velocity profile. The resulting profile, known as smoothing,
has continuous acceleration and results in reduced mechanical vibrations. IT 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.
The use of IT will not effect the trippoints AR and AD. The trippoints AR & AD monitor the
profile prior to the IT filter and therefore can be satisfied before the actual distance has been
reached if IT is NOT 1.
ARGUMENTS: IT n,n,n,n,n,n,n,n or ITA=n where
n is a positive numbers in the range between 0.004 and 1.0 with a resolution of 1/256.
n = ? Returns the value of the independent time constant for the specified axis.
USAGE: DEFAULTS:
While Moving Yes Default Value 1
In a Program Yes Default Format 1.4
Command Line Yes
Controller Usage
ALL CONTROLLERS
OPERAND USAGE:
_ITn contains the value of the independent time constant for the specified ‘n’ axis.
RELATED COMMANDS:
PR Position relative
PA Position absolute
JG Jog
VM Vector mode
LM Linear Interpolation Mode
EXAMPLES:
IT 0.8, 0.6, 0.9, 0.1 Set independent time constants for a,b,c,d axes
IT ? Return independent time constant for A-axis
:0.8
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