EDH0185En1020 — 07/11
4
VP-25XA
Precision Compact Linear Stage
Off-Centered Load (Q)
Maximum cantilever-load a stage can move: Q
≤
Cz / (1 + D/30)
D:
Cantilever distance.
3.4
Load Characteristics and Stiffness
Cz
(N)
60
– Cx; + Cx
(N)
40
k
α
x
(µrad/N.m)
20
k
α
y
(µrad/N.m)
20
k
α
z
(µrad/N.m)
30
Normal Load Characteristics
Axial Load Characteristics
3.5
Stage Weight
Weight indicated is the value for the stage with the top plate and cable.
(M-)VP-25XA
(kg)
1.5
with:
Q
H
:
Off-center load, Q
H
≤
Cz / (1 + D/30)
D:
Cantilever distance in millimeters
Cz:
Normal center load capacity on bearings
–Cx:
Inverse load capacity on X axis
+Cx:
Direct load capacity on X axis
k
α
x:
Angular stiffness (Roll)
k
α
y:
Angular stiffness (Pitch)
k
α
z:
Angular stiffness (Yaw)
k
α
y
k
α
x
Z
Q
H
D
Y
Cz
X
–
C
x
+
C
x
k
α
z
Qv
D
22.3
10
.3
Cx
with:
Q
V
:
Off-center load, Q
V
≤
Cz / (1 + D/30)
and Q
V
must be
≤
Cx
D:
Cantilever distance in millimeters
between the center of mass of the
load and the bearings center
22.3:
Distance between top surface and
the bearings center in millimeters
10.3:
Distance between under the top
plate and the bearings center in
millimeters
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