BASIC commands
PROGRAMMING MANUAL
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3.2.84 DEFPOS
/i
Arguments
N/A
Example
' Decelerate above 15 deg (0.2618 rad)
DECEL_ANGLE = 0.2618
See also
ACCEL
,
AXIS
,
UNITS
.
Type
Axis command
Syntax
DEFPOS(pos_1 [ , pos_2 [ , pos_3 [ , pos_4 [, ...]]]])
DP(pos_1 [ , pos_2 [ , pos_3 [ , pos_4 [, ...]]]])
Description
The
DEFPOS
command defines the current demand position (
DPOS
) as a
new absolute position. The measured position (
MPOS
) will be changed
accordingly in order to keep the Following Error.
DEFPOS
is typically used
after an origin search sequence (see DATUM command), as this sets the cur-
rent position to 0.
DEFPOS
can be used at any time.
As an alternative also the
OFFPOS
axis parameter can be used. This param-
eter can be used to perform a relative adjustment of the current position.
DEFPOS
works on the default basis axis or axis sequence group (set with
BASE
) unless
AXIS
is used to specify a temporary base axis.
Note: The changes to the axis position made using DEFPOS or OFFPOS are
made on the next servo update. This can potentially cause problems when a
move is initiated in the same servo period as the DEFPOS or OFFPOS.
The following example shows how the
OFFPOS
parameter can be used to
avoid this problem. DEFPOS commands are internally converted into
OFFPOS
position offsets, which provides an easy way to avoid the problem
by programming as follows:
DEFPOS(100): WAIT UNTIL OFFPOS = 0: MOVEABS(0)
Arguments
The command can take up to 64 arguments.
•
pos_i
The absolute position for (base+i) axis in user units. Refer to the
BASE
command for the grouping of the axes.