MPH-02, MPB-02, MPD-02
Drive Functions
8-63
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
correction value x
k
temperature
difference
(
∆
T)
P
1
(
∆
T
1
,x
k1
)
P
2
(
∆
T
2
,x
k2
)
P
3
(
∆
T
3
,x
k3
)
x
k3
x
k2
x
k1
∆
T
3
∆
T
2
∆
T
1
x
kn
:
correction value (measured position value – actual position value
(S-0-0051/S-0-0053))
∆
T
n
:
temperature difference
(measured temperature – reference temperature (P-0-0402))
Fig. 8-48:
Approximated straight correction line on the basis of measured
correction values at different
∆
T
The gradient of the approximated straight line is the value of the position-
independent temperature factor. By means of the value from the series of
measurements it is possible to calculate the position-independent
temperature factor:
∑
∑
∑
∑
∑
∆
−
∆
×
×
∆
−
×
∆
×
=
−
−
)²
(
²
)
(
0407
0
P
n
n
kn
n
kn
n
T
T
n
x
T
x
T
n
P-0-0407: axis correction temperature factor pos.-independent
n:
number of measured values
∆
T
n
:
temperature difference at which the correction value x
kn
was
determined
x
kn
:
correction value at the temperature difference
∆
T
n
Fig. 8-49:
Calculating the position-independent temperature factor from the
values of the series of measurements
The position-independent temperature correction is activated when the
value of
P-0-0407, Axis correction temperature factor pos.-
independent
is greater than zero.
Note:
With the value zero in parameter P-0-0407 the function of
position-independent temperature correction is deactivated.
This correction function does not require position data
reference for the measuring system to the corrected!
Position-Dependent Temperature Correction
The position-dependent temperature correction is used to compensate for
the temperature-dependent linear expansion of the mechanical transfer
elements of a servo axis or the measuring system. Depending on the
position of the axis slide, the temperature-dependent linear expansion
causes actual position value errors of different extent over the travel
range of the axis.
At a position of the axis there is a non-temperature-dependent "point of
reference" available that is used as the reference position for the position-
dependent temperature correction.
Calculation by Means of
Measured Values
Activating the Function
How to Use the Function
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
www.cmafh.com
