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User Manual
E727T0005, valid for E-727
BRO, 2019-06-28
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany
Page 215 / 240
Phone +49 721 4846-0, Fax +49 721 4846-1019, Email
Fault: Stage does not move
Possible Causes
Solution
E-727 models with
EtherCAT interface
(p. 164): Transition to
the
Ready to switch
on
state not possible
Make sure that the conditions for a transition to
Ready to switch on
are fulfilled
(p. 169).
Fault: Stage executes unintentional motion
Possible Causes
Solution
Configuration of the E-
727
The E-727 can be configured with parameter settings so that the AutoZero
procedure (p. 62) is automatically executed after switching on or rebooting.
Check the setting of the
Power Up AutoZero Enable
parameter (ID 0x07000802)
and adjust it if necessary.
Start-up macro is
executed
Check whether a macro is specified as the start-up macro and cancel the
selection of the start-up macro if necessary (p. 123).
Fault: Stage is oscillating or positions inaccurately
Possible Causes
Solution
The load was changed. Unsuitable settings of the notch filter and the servo-control parameters of the
E-727 can cause the stage to oscillate or to position inaccurately. Oscillations can
damage the stage and/or the load affixed to it.
If the stage is oscillating (unusual operating noise), immediately switch off the
servo mode or switch off the E-727.
Only switch on the servo mode after you have modified the settings of the
notch filter and the servo-control parameters of the E-727; see „Adjusting the
Notch Filter(s) in Open-Loop Operation“ (p. 136) and "Checking and Optimizing
the Servo-Control Parameters" (p. 140).
Thermal instability of
the system
The E-727 performance can be reduced directly after power on due to thermal
instability.
Switch the E-727 on at least one hour before starting work.
If the E-727 is not used, but should remain switched on to ensure the
temperature stability: Make sure that the servo mode is switched off (open-
loop operation) and the piezo output voltage is set to 0 V. To set the piezo
output voltage to 0 V, set the axis position to a corresponding value with the
SVA command.