DMC-40x0 Command Reference AM • 25
AM
FUNCTION: After Move
DESCRIPTION:
The AM command is a trippoint used to control the timing of events. This command will hold up
execution of the following commands until the current move on the specified axis or axes is
completed. Any combination of axes or a motion sequence may be specified with the AM
command. For example, AM AB waits for motion on both the A and B axis to be complete.
AM with no parameter specifies that motion on all axes is complete.
ARGUMENTS: AM nnnnnnnnnn where
n is A,B,C,D,E,F,G,H,S or T or any combination to specify the axis or sequence
No argument specifies to wait for after motion on all axes and / or sequences
USAGE: DEFAULTS:
While Moving Yes Default Value 0
In a Program Yes Default Format 1.0
Command Line No
Controller Usage
ALL CONTROLLERS
RELATED COMMANDS:
BG _BGn contains a 0 if motion complete
MC Motion Complete
EXAMPLES:
#MOVE ;'Program MOVE
PR 5000,5000,5000,5000 ;'Position relative moves
BG A ;'Start the A-axis
AM A ;'After the move is complete on A,
BG B ;'Start the B-axis
AM B ;'After the move is complete on B,
BG C ;'Start the C-axis
AM C ;'After the move is complete on C
BG D ;'Start the D-axis
AM D ;'After the move is complete on D
EN ;'End of Program
Hint: AM is a very important command for controlling the timing between multiple move sequences. For
example, if the A-axis is in the middle of a position relative move (PR) you cannot make a position absolute
move (PAA, BGA) until the first move is complete. Use AMA to halt the program sequences until the first
profiled motion is complete. AM tests for profile completion. The actual motor may still be moving. To
halt program sequence until the actual physical motion has completed, use the MC command. Another
method for testing motion complete is to check for the internal variable _BGn, being equal to zero (see
BG
command).
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