Bosch PIN8 N1 Guide de dépannage télécharger pdf (Page 491)

100

101

MPH-02, MPB-02, MPD-02 Drive Functions 8-59

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

The figure below illustrates the operating principle of precision axis error

correction:

Vcmd > S-0-0124, Standst. window

P-0-0411, corr.

table positive

act. pos.val.

(corrected)

corr. value internal

S-0-0124, Standstill window

S-0-0036, Velocity command value

act. pos. val., uncorrected

Vcmd < (-)S-0-0124, Standst. window

P-0-0412, corr.

table negative

Fig. 8-39: Block diagram for precision axis error correction

The correction values are determined by means of a reference measuring

system (e.g. laser interferometer). Within the desired correction range the

drive successively moves to the support points for the different directions

and the corresponding position error is measured.

)()( displayxmeasxxk −=

xk: correction value relate to support point

x(meas): measured position value at support point

x(display): S-0-0051 or S-0-0053

Fig. 8-40: Determining correction value for precision axis error correction

The correction values relate to support point are entered in the tables

P-0-0411 and P-0-0412.

The required length of the correction range and the maximum value of the

number of support points determine the minimum support point distance.

If a lower number of support points is selected, a bigger support point

distance is required with a correction value of the same length. This

however can reduce the precision of correction!

)-,P--(P-pointssupportofmax._no.

rangecorrectionoflength

0412004110

04100 =−−

P-0-0410 : axis correction support point distance

P-0-0411: axis correction, correction table positive

P-0-0412: axis correction, correction table negative

Fig. 8-41: Determining the support point distance

Note: With the value zero in parameter P-0-0410 the precision axis

error correction is deactivated!

Operating Principle

Determining the Required

Parameter Values

1 2 ... 486 487 488 489 490 491 492 493 494 495 496 ... 727 728

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Bosch PIN8 N1 Guide de dépannage Page 491

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