OPTIMUM
M A S C H I N E N - G E R M A N Y
Assembly
Version 1.2.5 dated 2017-03-10
Page 31
Original operating instructions
DH26GTV | DH28GSV | DH32GSV
GB
3.6.1
Connecting the optional foot switch
Floating contact for thread cutting.
The foot switch is used to reverse the direction of rotation for thread cutting.
Img. 3-7: Connector plug foot switch
Connect the foot switch to the connector. Compare the PIN assignment of the connector in
the cabinet.
INFORMATION
The connection cable has no polarity. The contact (2 wires) is designed as looped signal.
3.6.2 Warming up the machine
ATTENTION!
If the geared drill and in particular the drilling spindle is immediately operated at
maximum load when it is cold it may result in damages.
If the machine is cold, e.g. directly after having transported the machine, it should be
warmed up at a spindle speed of only 500 1/min for the first 30 minutes.
3.7
Electrical connection
CAUTION!
Must only be worked on by a qualified electrician or person working under the
instructions and supervision of a qualified electrician. Arrange the machine's connection
cable in such a way that it will not cause a tripping hazard.
Ensure that all 3 phases (L1, L2, L3) and the ground wire are connected correctly.
The neutral conductor (N) of its power supply is not connected.
400V three - phase connection, correct direction of rotation, observe phase sequence!
If necessary, two phase connectors at the three phase current switch or at the connection in the
control cabinet must be exchanged. The guarantee will become null and void if the machine is
connected incorrectly.
Please check that the type of current, voltage and protection fuse correspond to the values
specified. A protective earth ground wire connection must be available.
Main Fuse 16A.
Observe the notes on the connection for machines with frequency converters.
Connector plug
Foot switch