Newport New Focus Picomotor 8743-CL, User Manual

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91
FE
Description
Maximum following error threshold set.
Syntax
xx FE nn
Remarks
This command is used to set the maximum allowed following (tracking) error threshold for an
axis. This error is defined as the difference between the real (encoder) position and destination
(target) position of a motion device. The real position is the one reported by the position
sensing device (i.e., quadrature encoder).
If following error checking is enabled (see ZH command) and the following error exceeds the
maximum threshold specified with this command, the controller will automatically disable
closed-loop positioning (see MM command). Also, the positioning units must be set to
‘Counts’ in order for following error tracking and closed-loop correction to take effect (see SN
command).
NOTE: Following error checking must be enabled (see ZH command) in order for FE
command to take effect.
Argument Value Description
xx
1 to 2 Axis number
nn
0 to 2147483647 Following error value (units). Default = 1000
Example
2SN1 (set units to ‘Counts’; encoder monitoring)
2FE1000 (set following error threshold to 1000 counts)
2CL0.1 (set closed-loop update interval to 0.1 second)
2ZH0 (enable travel limit checking and following error checking)
SM (save settings to non-volatile memory)
See Also
FE?, SN, SN?, MM, ZH