Siemens SINUMERIK 840D sl Function Manual page 311

Setting data $SN_...
SD41341
SD41350
SD41351
Example 2: Cylinder error compensation with relative compensation values
Example 2 based on the compensation data of example 1. The cylinder error compensation
is also realized using the first compensation table (index 0).
In example 2, the cylinder error is determined only at two measuring points, unlike example 1.
The compensation values are to apply relatively, i.e. they are added to the existing
compensation values from example 1.
General compensation data
Setting data $SN_...
SD41356
1) The compensation values calculated below are added to the setting data SD41320 $SN_CEC_0[0]
and SD41321 $SN_CEC_1[0].
Measuring points
Setting data $SN_...
SD41330
SD41331
SD41340
SD41341
Calculation of the compensation values
Calculation of the compensation values is performed by the control based on a rising edge
(0→1) in setting data SD41355 $SN_CEC_CALC[0]:
● Compensation function: ΔX = m * Z + b = -7.5*10
● Calculated compensation values:
– ΔX
– ΔX
● Adding the calculated compensation values to the actual compensation values:
– SD41320 $SN_CEC_CEC_0[0] = SD41320 $SN_CEC_CEC_0[0] + ΔX
– SD41321 $SN_CEC_CEC_1[0] = SD41321 $SN_CEC_CEC_1[0] + ΔX
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
CEC_COMP_1[0]
CEC_COMP_STORE_0[0]
CEC_COMP_STORE_1[0]
CEC_CALC_ADD[0]
CEC_BAS_0[0]
CEC_BAS_1[0]
CEC_COMP_0[0]
CEC_COMP_1[0]
= 3.000075 mm
COMP_0
= -2.999925 mm
COMP_1
mm + 3.000075 = -1.000025 mm
mm - 2.999925 mm = 0.999975
Value Meaning
0.0 mm Measuring point P2: Cylinder error (deleted)
0.001 mm Bit memories for measuring point P1: Cylinder
error
0.002 mm Bit memories for measuring point P2: Cylinder
error
Value Meaning
TRUE Relative compensation values
Value Meaning
10.0 mm Measuring point P1: Base value
410.0 mm Measuring point P2: Base value
0.0 mm Measuring point P1: Cylinder error
-0.003 Measuring point P2: Cylinder error
mm
* Z + 7.5*10
-6
K3: Compensations
5.4 Interpolatory compensation
1)
-5
= -4.0001
COMP_0
= 3.9999
COMP_1
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