Bosch PIN8 N1 Průvodce řešením problémů stáhnout pdf (Strana 495)

100

101

MPH-02, MPB-02, MPD-02 Drive Functions 8-63

DOK-INDRV*-MP*-02VRS**-FK01-EN-P

correction value x

temperature

difference

(

∆

(∆T

)

(∆T

)

(

∆

)

∆

: correction value (measured position value – actual position value

(S-0-0051/S-0-0053))

∆T

: 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

)(

04070P

knnknn

TTn

xTxTn

P-0-0407: axis correction temperature factor pos.-independent

n: number of measured values

∆T

: temperature difference at which the correction value x

was

determined

: correction value at the temperature difference ∆T

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

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