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All BASIC commands
Section 4-2
132
4-2-67 DECEL
/i
4-2-68 DEFPOS
/i
Type
Axis parameter
Syntax
DECEL
Description
The
DECEL
axis parameter contains the axis deceleration rate. The
rate is set in units/s
2
. The parameter can have any positive value includ-
ing 0.
Arguments
N/A
Example
DECEL = 100 ' Set deceleration rate
PRINT " Deceleration rate is ";DECEL;" mm/s/s"
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 current position to 0.
DEFPOS
can be used at any time.
As an alternative also the
OFFPOS
axis parameter can be used. This
parameter 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 OFF-
POS are made on the next servo update. This can potentially cause
problems when a move is initiated in the same servo period as the DEF-
POS 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 32 arguments.
•
pos_i
The absolute position for (base+i) axis in user units. Refer to the
BASE
command for the grouping of the axes.
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