XRT-A-25-109
Compact rotation stage with nanometer error motion
Compact and ultra-precise piezoelectric rotary stage with an extremely small error motion and large aperture. This makes the XRT-A suited for a broad range of precision positioning applications or for state-of-the-art vacuum and non magnetic applications like micro and nano-CT scanners, X-raydiffraction systems, electron microscopy and synchrotron applications. The stage can be equipped with active compensation technology to further reduce the radial error motion to less than 0.5 µm.
Stacking onto a Xeryon linear stage is easily done with available interface plates.
Key features
drive principle
stick-slip piezo motor
bearings
integrated drive concept
lifetime
> 100000 rev.
control principle
closed-loop position control
operating voltage
20 to 48 V
Model code structure
stage type
approx. rotor diameter (mm)
encoder resolution (µrad)
optional
active error motion
compensation*
vacuum compatibility (10-6 mbar)
non-magnetic materials**
XRT-A
-25
-109
-AC
-HV
-NM
* in radial direction and in one plane with respect to stator (see drawing)
** titanium rotor (Ti-6Al-4V) and stainless steel bolts (A2/A4)
Environmental compatibility
temperature range
-30°C to +70°C
humidity range
20% to 90% RH (non-condensing)
heat dissipation (motor only)
< 1 W
mounting surface flatness
< 5 µm
Motion performance
XRT-A-25-109
XRT-A-25-109-AC
unit
tolerance
ENCODER
type
optical, incremental
counts per rev.
57600
resolution
109
22.5
6250
µrad arcsec
µº
index
1 per rev.
accuracy
± 0.017
%
typ.
STAGE
positioning
resolution
= min. step size
= min. incremental motion (MIM)
125
25
7100
µrad arcsec
µº
typ.
unidirectional repeatability
± 125
± 25
± 7100
µrad arcsec
µº
typ.
bidirectional repeatability
± 250
± 50
± 14200
µrad arcsec
µº
typ.
speed
max. speed
12
º/s
typ.
min. speed
0.012
º/s
typ.
stability
1
%
typ.
point-to-point positioning time*
0 kgmm2 inertia
1 kgmm2 inertia
300
500
msec msec
typ.
error motion (p-p)
radial at 7 mm above top surface
1
0.5
µm
max.
axial in centre
0.5
µm
max.
tilt (wobble)
50
µrad
max.
* for a 1° step and settling within bidirectional repeatability range
Note: a detailed description of the technical terms used in this datasheet can be found on the Terminology page of our website.
Mechanical properties
XRT-A-25-109
XRT-A-25-109-AC
unit
tolerance
dimensions
40 x 31 x 15
mm
± 0.1
rotor diameter
28
mm
± 0.1
aperture
9
mm
± 0.1
mass (w/o connector)
55
g
± 5%
load capacity (payload limitation)
inertia mass*
8
0.1
kgmm2 kg
max.
load capacity
(bearing force limitation)
axial radial tilt
1
0.5
6
N N
mNm
max.
holding torque
4
mNm
min.
driving torque
4
mNm
min.
stage material
rotor housing
stainless steel AISI316L or titanium Ti-6Al-4V
(-NM) anodised aluminium
cable length**
1.5
m
± 0.1
connector (stage to controller)
1x 15-pin D-sub HD male
* assuming a solid cylindrical payload of dia. 25.4 mm
** extension cables available or shorter cable on request
Controller/software
The XRT-A rotation stage is compatible with all Xeryon controllers. Controlling of the stage is done with:
· easy-to-use Windows interface
· LabVIEW interface program (compiled program or source)
· MATLAB interface script
· C++ and Python libraries
Drawing
Measurement data