General Information glossary
Scanners and Stepping Positioners
The low temperature scanners and stepping positioners are optimized for maximal performance under cryogenic conditions and high magnetic fields( tested up to 35 T).
• Scanners
Scanners are suitable for travel ranges in µ m range and their motion is continuous. The scanners are recognizable by the name „ ANS“.
Working Principle of Stepping Positioners
• Stepping positioners
Stepping positioners are suitable for travel ranges in mm range. They are driven via slip-stick principle( sawtooth voltage with an amplitude up to 70 V at LT).
1 2 3
At Rest Sticking Phase Slipping Phase
Applied voltage |
Piezo Voltage |
1
AT REST
Time
|
Piezo Voltage |
STICK |
2
Time
|
Piezo Voltage |
SLIP |
3 Time |
ECS Series ANP Series |
Piezoelectric actuator |
Clamped table Guiding rod
Flexible membrane Fixed frame
|
Flexible membrane supports the piezo and the axis |
∆x net step is completed |
• moving table clamped to guiding rod
• guiding rod is connected to piezo element
• no voltage is applied → table at rest
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• sawtooth shaped voltage is applied to piezo
• with the slow flank, table sticks to guiding rod and is moved about distance delta x)
• delta x down to 50 nm
• steep flank of voltage, the rod is accelerated fast
• table overcomes friction and disengages from drive element
• step is completed