Troubleshooting; Operating Modes; Open-Loop (Servo Off) Mode - PI E-664 User Manual

E-664 LVPZT Position Servo Controller
2.2.

Troubleshooting

No Operation—Display is dark after switching on
Display in MICRON mode shows no change
Controller runs into overflow when SERVO ON
NanoCube oscillates after switching SERVO ON
E-664s are amplifiers generating voltages up to 120 V for driving LVPZTs. The
output power may cause serious injury. Only qualified, authorized personnel
should work on or with these devices.
3.

Operating Modes

The operating mode is settable independently for each channel and is determined
by the position of the corresponding SERVO toggle switch and the use of the DC
offset potentiometer and CONTROL INPUT terminals.
3.1.

Open-Loop (Servo OFF) Mode

3.1.1. Manual Operation
The output voltage can be set by a 10-turn DC Offset potentiometer in the range of
approximately 0 to 100 V. For manual operation CONTROL IN should clamped at
0 V.
3.1.2. External Operation
The output voltage is controlled by an analog signal applied to the CONTROL IN
BNC input ranging from -2 to +12 V. Multiplying by the gain factor of 10, an analog
output voltage range of approximately -20 to +120 V results. The DC-offset
potentiometer can be used to add an offset voltage of 0 to 10 V to the signal input,
effectively shifting its range between -2 to +12 V and -12 V to +2 V.
Release 1.0.4
Check supply voltage and fuse.
Make sure NanoCube is connected and cable is not defective.
Bring operation voltage
ZERO potentiometer.
Switch immediately to SERVO OFF and check mechanical
mounting and servo parameters. If load conditions have been
changed, the mechanical resonant frequency may also have
changed. See the E-802 User Manual for details on resetting the
dynamic characteristics (P- and I-term and notch frequency) It
will be necessary to open the controller case to make these
adjustments.
Warning:
Read This Before Operation:
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into -5 V to+90 V range with
High Voltage
User Manual PZ 99E
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