PI PiezoWalk E-712 - Page 28

User Manual
E712T0010, valid for E-712.N1, E-712.1AM, E-712.1AN, .2AN, .3AN
CMo, BRo, 10/31/2024
Physik Instrumente (PI) SE & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Germany page 28 / 40
Phone +49 721 4846-0, fax +49 721 4846-1019, e-mail info@pi.ws, www.pi.ws
PiezoWalk Shearing-To-Clamping Ratio
If full-step mode is selected, the PiezoWalk Shearing-To-Clamping Ratio parameter (ID 0x07011800) gives the
ratio of the clamping time (2 * t
c
) to the whole step cycle time t
z
. Hence it directly affects the rising time of the
clamping and shearing voltages.
Z
C
t
t
value
⋅
=
2
.
Must be in the range of 0.01 to 0.5. Since the motion of the runner is interrupted during the clamping phases, a
value higher than 0.5 is not reasonable.
Fig. 17: Recovery and driving phases in nanostepping mode
Keep in mind that the PiezoWalk Shearing-To-Clamping Ratio, the step cycle time, the voltage amplitude and the
actuator capacitance affect the maximum amplifier current.
actuator
C
C
t
UU
I ⋅
−
=
)(
minmax
max
This current limits the velocity of a PiezoWalk® drive.
Clamping phase t
c