Specialized Concentrated Focused
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Machine Tool Debugging
supply for the terminal board, and power on the machine signal system (proximity switch, etc).
Examine the input signal LEDs of the terminal board: for example, if the home switches connected
are normally closed, at this time, three LEDs of X0, Y0 and Z0 should be on, trigger a home switch
through artificial imitation. (For a travel switch, artificial press can be used to observe whether the
signals can be received. For a photoelectrical switch, artificially obstruct the light to see if the
signals can be gotten. For a metal proximity switch, artificially approach it with a metal block to
see if the signals can be gotten.) If the corresponding LED is out, it indicates the REF. point
signals have been sent to the terminal board. If the home switches connected are normally open,
LEDs should be usually out, and by artificially touching a switch, the LED should become light,
which shows the REF. point signals have been sent to the terminal board. The same method can
be taken to test other input ports to ensure the correctness of the wiring between the terminal
board and the machine tool, to greatly shorten the debugging time.
2) Power on the computer and run NcStudio, and then switch to interface [I/O State] in NcStudio V8
as shown in Fig. 4-2, or to [IOPort] interface in NcStudio V9 as shown in Fig. 4-3. The screenshots
are for reference only. Input and output signals are displayed in the interfaces. Ports displayed
vary with software version and hardware (terminal board). The actual situation is in line with
shipment. Solid dots represent input signals, while hollow dots output signals; dots in red indicate
the signals are invalid at the time (with no input or output), while dots in green indicate the signals
are valid at the time.
Fig. 4-2 [I/O State] Interface in NcStudio V8
