|
Open loop – closed loop – Why can I reach in closed loop operation only 80% of the motion in open loop operation?
When piezo actuators with a measurement feedback system are operated in closed loop the full motion will not be available. The control system needs a voltage buffer to reach the specified critical limits of the zero point and the maximum motion in the specified control response time. The decrease of the motion is approx. 20% of the overall value.
What do the different suffix's mean on our components, e.g. on the electronics ENV 300? Ending
| Example
| Abbreviation
for
| What does it mean?
| Examples for
fitting actuator
| SG
| ENV 300 SG
| Strain Gauge
| This amplifier fits to
actuators with an
integrated strain gauge
| PA 8/14 SG,
PU 40 SG,
MIPOS 250 SG
| CAP
| ENV 300 CAP
| Capacitive
| Applicable for systems
with an integrated capacitive
sensor
| PZ 38 CAP, PXY
100 CAP, MIPOS
250 CAP
| CLE
| ENV 300 CLE
| Closed Loop
External
| Applicable for systems with
an external either capacitive
or strain gauge sensor
| PA 8/14 SG - exteral
PZ 38 CAP - external
| nanoX
| ENV 300 nanoX
| nanoX
| This amplifier fits to actuators
with a bidirectional drive
| nanoX 200, nanoSX 400,
nanoSX 400, PSH 15/1
nanoMIPOS 400 | |
nanoX SG
| ENV 300 nanoX
SG
| nanoX
Strain Gauge
| Applicable for systems with a
bidirectional drive and an
integrated strain gauge
| nanoX 400 SG,
PSH 35 SG
| nanoX CAP
| ENV 300 nanoX
CAP
| nanoX
Capacitive
| Applicable for systems with a
bidirectional drive and an
integrated capacitive
measurement system
| nanoX 200 CAP,
nanoSXY 400 CAP,
nanoMIPOS 400 CAP
| nanoX CLE
| ENV 300 nanoX
CLE
| nanoX
Closed Loop
External
| This amplifier fits to actuators
with a bidirectional drive and
an external measurement
system
| nanoX 200 CAP-
external
|
How do you know which actuator you need?
- How much motion range do you need, and in how many directions?
- What are your requirements in regards to accuracy and repeatability?
- Will the actuator work dynamically?
- What frequency do you need and what kind of function for this frequency?
- How fast does the actuator need to travel?
- What is the mass you want to move, and what forces will the actuator have to generate respectively?
Why doesn‘t my system have the same resolution, which is specified in the catalog?
In the catalog you’ll find the resolution of the actuator listed. While the resolution of the ceramic is nearly unlimited, the system is limited by the drift, mechanical factors or environmental conditions as temperature or vibrations. Typically the resolution is determined by the noise behavior and ripple of the electrical supply. Our low noise amplifiers have a noise of < 0.3 mV@500 HZ.
|
