Schaeffler SMART Series - ΔT Functionality

Schaeer Technologies
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11.3 ΔT functionality This functionality is used if the temperatures in a workpiece
must not dier too much in order to avoid stresses in the
material. The functionality is also used for bearings when the
temperatures of the inner ring and outer ring must not dier too
much. If necessary, ask the supplier of the workpiece what the
maximum temperature dierence in the workpiece may be.
The ΔT functionality is switched on and set as described in
section 6.5.
For the ΔT functionality it is necessary that the two sensors (T1
and T2) are connected to the heater and positioned correctly
on the workpiece.
Positioning of sensors:
Position sensor T1 (red) at the point where the heat is applied
to the workpiece; this is usually the bore. This sensor is the
“main sensor” and the master in the heating process. Position
sensor T2 (green) elsewhere on the workpiece. Position it
in such a way that it is easy to monitor a possible dierence
in temperature between the two measuring points on the
workpiece. See also the image in chapter 7.
The temperatures T1 and T2 are measured during the heating
process. The dierence between these two temperatures is
calculated continuously. If the dierence is larger than the
temperature set under “ΔT switch o”, the heating process
switches o or pauses.
When the process is paused, the screen indicates “ΔT pause”.