NOTICE
Damage after reconnecting due to a charged P-844!
The P-844 can remain charged when the connecting cable is pulled out of the electronics
during operation. Reconnecting a charged P-844 to electronics during operation can cause a
mechanical impulse that will damage the P-844.
►
Do not pull the connecting cable of the P-844 out of the electronics during operation.
►
If the connecting cable of the P-844 is accidentally pulled out of the electronics during
operation: Switch off the electronics before you reconnect the P-844.
NOTICE
Destruction of the piezo actuator due to overheating!
Overheating can destroy the piezo actuator.
►
Adjust the operating voltage, operating frequency and/or operating time so that the
maximum operating temperature (p. 26)
of the piezo actuator is not exceeded; see
"Determining the Operating Parameters" (p. 16)
NOTICE
Uncontrolled oscillation!
Oscillation can cause irreparable damage to the P-844. Oscillation is indicated by a humming
noise and can be caused by the following:
■
A change in the load and/or dynamics requires the operating parameters to be adjusted.
■
The P-844 is operated near to its resonant frequency.
►
If you notice oscillation, stop the P-844 immediately.
Starting and Operating the P-844
1. Start up the electronics (see the user manual for the electronics).
2. Configure the electronics for the P-844 during startup. If you are using a digital controller
from PI, run the PC software and select the entry in the positioner database that matches
the P-844 exactly.
3. Start a few motion cycles for testing purposes (see the user manual for the electronics).
7.3
Discharging the P-844
The P-844 must be discharged in the following cases:
■
When the P-844 is not in use but the electronics remain switched on to ensure
temperature stability
■
If the P-844 is accidentally disconnected from the electronics during operation
■
Before disassembling (e.g., before cleaning and transporting the P-844) as well as for
modifications
Requirements
✓
You have read and understood the
general safety instructions (p. 7)
Tools and Accessories
■
Discharging a P-844 Connected to the Electronics
1. Set the piezo voltage to 0 V on the electronics.
7 STARTUP / OPERATION
P844M0001EN
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11/13/2018
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M O T I O N | P O S I T I O N I N G