Fetch Speed, Torque And Power - Siemens SINUMERIK 840D sl Commissioning Manual

Service and diagnostics
18.16 Spindle diagnostics
18.16.3

Fetch speed, torque and power

To check the loads on the spindle, the speed, torque, and power are acquired in a histogram
as function of the operating hours. The color coding indicates the following states:
● Light green: low load
● Green: rated load
● Yellow: high load
● Orange: critical load
Procedure
Possible conclusions
● The speed histogram is an indication of the load on the bearings and rotary gland caused
by the speed.
● The speed histogram is an indication of the load on the bearings caused by the stock
removal forces. The relationship between torque and radial force changes, however,
depending on the tool diameter (lever arm), the milling arc (superimposition of the cutting
forces of the individual cutting edges) and the cutting force coefficients (the stock removal
consists of cutting force force, infeed force and passive force - only the cutting force is
acquired via the torque).
● The power histogram provides an indication of the potential for a process optimization.
The power histogram also allows an estimate whether the loads caused by speed and
torque are superimposed over time and thus accumulated.
18.16.4 Checking the clamping system
The diagnosis of the clamping system offers the following capabilities:
● Fast and robust detection of the clamped states
● Monitoring of the clamping task and the clamping system
408
1. The "S1 Spindle Diagnostics" window is open.
2. Press the "Speed/power" softkey.
The "S1 Speed/Power" window opens and displays in a histogram the
acquired data.
3. Press the "Back" softkey to return to the data overview.
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
SINUMERIK Operate (IM9)