Siemens SINUMERIK 840D sl Function Manual page 281
Extended functions
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- Function manual (2184 pages) ,
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Example 2: Compensation with table multiplication
Compensation of sag of the foundation of a drilling machine with table multiplication.
Figure 5-7
On large machines, sagging of the foundation can cause inclination of the whole machine.
The compensation in axis X1 depends on:
● Position of the axis X1 because it determines the angle of inclination β
● Position of axis Z1, in which the drill is located.
The total compensation value ΔX1
ΔZ1 of the compensation tables 1 and 2 of axes X1 and Z1, yielding:
ΔX1
Figure 5-8
Compensation table 1 (index = 0):
● Basic axis: X1
● Compensation axis: X1
● Compensation values: Sine of the position-dependent tilt angle β(X1)
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Sag of the foundation
= ΔZ1 * ΔX1 = ΔZ1 * sinβ(X1) ≈ ΔZ1 * β(X1)
total
Table multiplication
is calculated from the compensation values ΔX1 and
total
K3: Compensations
5.4 Interpolatory compensation
281
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