Hermle UWF 902 H, Operating Manual, Page: 55 / 135

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3.13 Moving Free
The acceptable traverses are determined by
software switches in the control unit and are
monitored at the end positions of all axes by limit
switches.
In case the control unit ignores the software switches
due to a malfunction, the respective axis drives up
to the limit switches.
As soon as this switch engages, the machine is
stopped via the EMERGENCY STOP function.
Check the reason for the EMERGENCY STOP
message. If there is no doubt, that it is caused by
a limit switch, the respective axis can be manually
moved free. If in doubt check with our Service
Department.
The moving free from this position is only possible
by simultaniously pushing the acceptance key [2]
and key „S3“ [1] which is located in the electrical
cabinet.
A second person needs to push key „S3“ during the
following sequence.
• Push the acceptance key.
• Erase the message on the screen by pushing
„Reset“ [3].
3.13 Moving Free
• Select the appropriate axis by using the direction
keys [4]. The axis can now be moved free
and key „S3“ can now be released.
After switching on the main switch the following
three steps must be performed additionally after
erasing the screen:
• Press the key to change operating modes [4].
• Press key „Mod“ [5].
• Dial in key number 84159 and close the input by
pressing „Enter“ [6].
Danger
Note that the electrical cabinet may only be opened
by authorised personel (plant electrician etc.).
Before moving free make sure, that the axis is
moved in the opposite direction. The relevant axis
can be moved free by the respective direction keys.