Baumer HMG 10-Profibus DP Series Installations- und Betriebsanleitung - Seite 15

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4.5

How to prevent measurement errors

To ensure that the encoder operates correctly, it is necessary to mount it accurately as

described in section 4.1 to 4.4, which includes correct mounting of the torque arm.

The radial runout of the drive shaft should not exceed 0.2 mm (0.03 mm recommended),

to prevent an angle error.

An angle error may be reduced by increasing the length of L1*. Make sure that the length

L2 of the torque arm, see below, is at least equal to L1**.

The angle error Δρ

Δρ

= ±90°/π · R/L1

mech

with R: Radial runout in mm

L1:

Example:

For R = 0.06 mm and L1 = 69.5 mm the resulting angle error Δρ

For more information, call the telephone hotline at +49 (0)30 69003-111.

* For this different braces for the torque arm are available on request.

** If L2 < L1, L2 must be used in the calculation formula.

MB246EN - 11171695, 17A2, Baumer_HMG10-ProfibusDP_II_EN

can be calculated as follows:

mech

Distance of the torque arm to the center point of the encoder in mm

MOUNTING / HOW TO PREVENT MEASUREMENT ERRORS

equals ±0.025°.

mech

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