Decision-Making Support For Apc And Apc Eco - Siemens SINUMERIK 840D sl Commissioning Manual

Drive tuning

10.8 Decision-making support for APC and APC ECO

10.8 Decision-making support for APC and APC ECO
Conditions for Advanced Position Control
There is a vibration on the load side of the axis (carriage, table) in the axis direction:
● The vibration is excited by the axis motion.
● The vibration is excited by the machining process (e.g. milling, first cut).
Software option
In order to use this function a license is required for the following option:
"Advanced Position Control" (6FC5800-0AM13-0YB0)
Criteria for Advanced Position Control
The vibration could also be reduced by a weaker speed controller:
p1460 Speed controller P gain adaptation speed, lower
p1462 Speed controller integral time adaptation speed, lower Reduce integral time Tn
The noise suppression and dynamic behavior of the closed-loop controller worsens with a weak
speed controller. Disturbance variables, such as friction, then occur more often, especially with
reversing behavior (the quadrant on the circle worsens), and marks become visible on the
workpiece. Use the Advanced Position Control to find a compromise between noise
suppression and oscillation damping.
Conditions for Advanced Position Control ECO
The vibration could also be reduced by a weaker speed controller:
p1460 Speed controller P gain adaptation speed, lower
p1462 Speed controller integral time adaptation speed, lower Reduce integral time Tn
This is, for example, possible if the gear factor is small or the spindle pitch is at least 10 mm.
Software option
In order to use this function a license is required for the following option:
"Advanced Position Control ECO" (6FC5800-0AM12-0YB0)
Criteria for Advanced Position Control ECO
If the above-mentioned conditions are fulfilled, perform the following steps:
1. Configure Advanced Position Control ECO to identify the frequency of the vibration: Approx.
30% accuracy is adequate.
2. Oscillation damping: Enter frequency, activate Advanced Position Control ECO and then
check the vibration response on the load side.
342
Increase P gain
Increase P gain
CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA