DMC-18x6 Command Reference
137
MF
FUNCTION: Forward Motion to Position
DESCRIPTION:
The MF command is a trippoint used to control the timing of events. This command will hold up
the execution of the following command until the specified motor moves forward and crosses
the position specified*. The units of the command are in quadrature counts. Only one axis
may be specified at a time. The MF command only requires an encoder and does not require
that the axis be under servo control.
* When using a stepper motor, this condition is satisfied when the stepper position (as determined
by the output buffer) has crossed the specified Forward Motion Position. For further
information see Chapter 6 of the User Manual "Stepper Motor Operation".
ARGUMENTS: MF n,n,n,n,n,n,n,n or
MFA=n where
n is a signed integer in the range -2147483648 to 2147483647 decimal
USAGE: DEFAULTS:
While Moving
Yes
Default Value
-
In a Program
Yes
Default Format
-
Command Line
Yes
Controller Usage
ALL CONTROLLERS
RELATED COMMANDS:
Trippoint for after Relative Distances
Trippoint for after Absolute Position
EXAMPLES:
#TEST
Program B
DP0
Define zero
JG 1000
Jog mode (speed of 1000 counts/sec)
BG A
Begin move
MF 2000
After passing the position 2000
V1=_TPA
Assign V1 A position
MG "Position is", V1
Print Message
ST Stop
EN
End of Program
Hint: The accuracy of the MF command is the number of counts that occur in 2*TM
sec. Multiply the
speed by 2*TM
sec to obtain the maximum error. MF tests for absolute position. The MF command can
also be used when the specified motor is driven independently by an external device.
