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DMC-1400 Series Command Reference FI ● 91
FI
FUNCTION: Find Index
DESCRIPTION:
The FI and BG commands move the motor until an encoder index pulse is detected. The
controller looks for a transition from low to high. When the transition is detected, motion
stops and the position is defined as zero. To improve accuracy, the speed during the
search should be specified as 500 counts/s or less. The FI command is useful in custom
homing sequences. The direction of motion is specified by the sign of the JG command.
ARGUMENTS: FI
USAGE:
While Moving No Default Value ---
In a Program Yes Default Format ---
Command Line Yes
Can be Interrogated No
Used as an Operand No
Controller Usage
ALL
RELATED COMMANDS:
FE Find Edge
HM Home
BG Begin
AC Acceleration Rate
DC Deceleration Rate
SP Speed for search
EXAMPLES:
#HOME Home Routine
JG 500 Set speed and forward direction
FI Find index
BG Begin motion
AM After motion
MG "FOUND INDEX"
HINT: Find Index only searches for a change in state on the Index. Use FE to search for the Home.
Use HM (Home) to search for both the Home input and the Index. Remember to specify BG after each
of these commands.