Siemens SINUMERIK 840D sl Commissioning Manual page 247

Measuring procedure
There are two techniques that can be selected for determining compliance:
● Milling standardized workpiece and selecting the optimum milling path
For a standardized workpiece, a cycle is available to mill several milling paths with different
compliance factors. The compliance factor can be empirically determined based on the
workpiece surface quality.
For the cycle settings, you can also select face milling for the workpiece in order to carry out
several tests with different compliance factors on one workpiece.
● Determining positional deviations using a probe
The position deviation is precisely measured at different positions. Based on this, the
compliance factor can be calculated once the acceleration or deceleration that has been
achieved is known.
Machine data
Axis machine data for nodding compensation:
Number
MD37302
MD37310
MD37320
MD37330
MD37312
MD37322
MD37332
MD37314
MD37324
MD37334
MD37316
MD37326
MD37336
MD37318
MD37328
MD37338
Additional information is provided in Chapter "Compensations" in the "Monitoring and
Compensating (https://support.industry.siemens.com/cs/ww/en/view/109767451)" Function
Manual.
CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA
Name
$MA_NOCO_FILTER_TIME
$MA_NOCO_INPUT_AX_1
$MA_NOCO_INPUT_AX_2
$MA_NOCO_INPUT_AX_3
$MA_NOCO_ADAPT_AX_1
$MA_NOCO_ADAPT_AX_2
$MA_NOCO_ADAPT_AX_3
$MA_NOCO_ADAPT_NUM_AX_1
$MA_NOCO_ADAPT_NUM_AX_2
$MA_NOCO_ADAPT_NUM_AX_3
$MA_NOCO_ADAPT_POS_AX_1
$MA_NOCO_ADAPT_POS_AX_2
$MA_NOCO_ADAPT_POS_AX_3
$MA_NOCO_COMPLIANCE_1
$MA_NOCO_COMPLIANCE_2
$MA_NOCO_COMPLIANCE_3
8.5 Nodding compensation
Effect
Time constant for smoothing nodding
compensation values
Machine axis, which causes nodding
motion
Machine axis, whose position influen‐
ces nodding motion
Number of positions of the adaptation
characteristic of nodding compensation
Positions of the adaptation characteris‐
tic of nodding compensation
Nodding compensation compliance fac‐
tor
NC commissioning
Unit
[s]
[1...31]
[1...31]
[1...3]
[mm]
[s ]
2
247