Overview

Deformation and its effect

Temperature changes cause an expansion or contraction of machine parts.

Deformations cause offsets in the axis positions that are not detected by the machine's position measuring system and lead to inaccuracies in the finished workpiece.

Compensation

Temperature compensation provides a function to correct the command variable of the axis depending on the current temperature and axis position.

The compensation values are determined according to the following equation:

Δs (T,s) = offset₀(T) + coefficient(T) * [s-s₀]

where:

s = current position of the axis

T = current reference temperature

S₀ = reference position of the axis

Offset₀(T) = temperature-dependent deviation from reference position

Coefficient = temperature-dependent ratio of deviation to distance from reference position

Effectiveness

The temperature compensation is effective if:

• it was activated for the axis and
• the axis is homed.