Clamping System: Clamping Time Statistics - Siemens SINUMERIK 828D Commissioning Manual

Spindle function
8.4 Spindle diagnostics
Statistical data
● Speed threshold
Faulty clamping/releasing opera‐
tions (total)
8.4.10

Clamping system: Clamping time statistics

This window displays the statistics for the determined clamping times.
Statistical data
Last determined clamping time
Reference clamping time (with tool)
● Minimum
● Maximum
● Mean
Mean clamping time (without tool)
● 24 h
● 10 days
● 100 days
If a Power On of the SMI24 is performed during the start-up phase, the previously determined
values are discarded. The counter for the first 100 clamping operations is set to zero and the
reference times up to the 100th clamping operation can be determined again. After the start-
up phase (first 100 clamping operations), the values of the reference clamping time are
"frozen". Even after a Power On of the SMI24, the values remain stored and can no longer be
changed.
218
Meaning
Limit for the spindle speed in the "Clamped without tool" clamp‐
ing state (as-delivered value).
Changing this speed limit via the diagnostics overview "S1
clamping system" → "Speed limits" → "Change" has no effect on
the value specified here.
Accumulated number of clamping operations that have not run
through the clamping states "Released" clamping state [3] →
"Clamped" clamping state [7, 8 or 10] → "Released" clamping
state [3] without interruption.
A clamping cycle is considered to be faulty when, starting from
one state, the next state that is reached is the previous state
again ("State return").
Meaning
Measured time for the last performed clamping operation.
Definition of a clamping operation: "Released" clamping state
[3] → "Clamped with tool" clamping state [7 or 8]. Clamping state
3 = Released; clamping state 7 = Clamped with tool and S4 = 0
(No); clamping state 8 = Clamped with tool and S4 = 1 (Yes)
During the spindle start-up phase, the first 100 clamping opera‐
tions are measured by the SMI24 and the minimum value, max‐
imum value and the mean value determined.
The shortest clamping time determined from the first maximum
100 clamping operations.
The longest clamping time determined from the first maximum
100 clamping operations.
The mean clamping time determined from the first maximum
100 clamping operations.
After the first 100 clamping times determined for the reference
time, the mean values for the other measured clamping times
are calculated.
Mean clamping time of the clamping cycles determined in the
last 24 hours.
Mean clamping time of the clamping cycles determined in the
last 10 days.
Mean clamping time of the clamping cycles determined in the
last 100 days.
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3
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