Determining Compliance From The Best Milling Path - Siemens SINUMERIK 840D sl Commissioning Manual

Activating/deactivating nodding compensation
To analyze the effect of the nodding compensation on the machining, you can deactivate
individual or all compensation relationships without deleting the original parameterization.
Deactivation is useful for the following applications:
● Diagnostics and problem analysis:
The effect of a specific compensation relationship on the workpiece surface should be
tested. Because a superimposition of compensation relationships from different axes and
different compensation relationships is possible, the effect of an individual or all successive
compensation relationships should be tested. For this purpose, the compensation is
deactivated temporarily; the determined compliance values are retained.
● Series commissioning:
The compensation values are loaded via the series commissioning archive and can be
deactivated during the machine tuning, to tune the machine without the effect of the nodding
compensation. On completion of the tuning, the compensation values are reactivated. As
check, a test part can be milled.
Procedure:
1. In the "Nodding compensation - Overview" select the "Deactivate/activate" softkey to
deactivate the compensation relationships.
2. Select the individual compensation relationships or select the "Deactivate all" softkey.
3. The "Back" softkey returns you to the "Nodding compensation - Overview".
4. If the nodding compensation should act again, reset the deactivated compensation
relationships to the "active" status.
The compensation relationships are deactivated bit-by-bit in MD37300 $MA_NOCO_ENABLE.
8.5.3

Determining compliance from the best milling path

Measuring technique: Best milling path
For a standardized workpiece, a cycle is available to mill several milling paths with different
compliance factors. The necessary compliance factor can be empirically determined based on
the surface quality of the milled workpiece.
Note
Active transformation
In order to guarantee a fault-free cycle sequence, active transformations are to be deactivated
before starting the cycle.
CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA
NC commissioning
8.5 Nodding compensation
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