FAQ?
Is the travel range dependent on temperature or pressure?
• For the ANP positioners, rotators and goniometers it is not dependent on that. The scan range of the ANS scanners is however limited at lower temperatures.
Is the maximum load dependent on temperature or pressure?
• Yes, at lower temperatures as well as in vacuum conditions the maximum load capacity is lowered( compared to ambient conditions).
What is the difference between the / HV and / UHV positioners?
• For the / UHV positioners special UHV compatible( i. e. not outgasing) materials are used. Moreover, a test in a baked out UHV environment is performed for all UHV positioners to guarantee full functionality usually down to 5x10-11 mbar.
What’ s the maximum pressure and magnetic field ratings?
• attocube / UHV-positioners are specified down to 5x10-11 mbar and the maximum tested magnetic field is currently 35 T.
What is the temperature range for the positioners? Are they bakeable?
• There are different attocube ANP positioners specified from the mK range up to 373 K. All UHV positioners can be baked out up to 423 K.
Is the controller included with the purchase of a positioner? What else do I need?
• A motion controller is not included with the positioner. attocube sales engineers help you to find the suitable motion controller as well as cables. Moreover, there are different kinds of accessories like feedthroughs or thermal coupling devices.
What is meant with " open loop " and " closed loop "?
• The positioners without an encoder are driven in " open loop "- those positioners can only be driven forward or backward without an actual readout of the position. Whereas the positioners with an encoder are driven in " closed loop " mode, which means that a feedback loop is integrated into the control electronics and minimizes the difference between target position and actual position.
What is the difference between / RES and / RES +?
• Both encoders are based on a potentiometer. The / RES + encoder is explicitly for our / ULT positioners.
What ' s the meaning of " fine positioning mode "?
• The fine positioning mode is the " scan "-mode of our positioners. For that, a DC voltage can be applied to obtain sub-step-size resolution.
What ' s the thermal conductivity of the ATC?
• It mostly depends on the type of link( sheets or braids) between the upper and lower plate and of the length of the link.
What is the difference between accuracy and precision?
• Please refer to the glossary.