July 2013 8.8 Electronic handwheel 1515
If the override potentiometers on the handwheel are switched active, then the
message Handwheel override active also appears in the pop-up window on
the screen of the iTNC, and the handwheel can only be deactivated if the
control of the override potentiometers is returned to the operating panel. If
you try to deactivate the HR 420 while it has control over the override, then a
window appears requesting that you first deactivate the handwheel’s control
over the override.
PLC Marker M4670 provides information on whether the override
potentiometers of the HR 420 or of the machine operating panel are active.
M4670 – Potentiometer of HR 420 is active
M4670 = 1: Potentiometer of machine operating panel is active
The override factor of the active override potentiometer can also be influenced
with M764 or W766.
When marker M4626 is set, the PLC locks all key inputs of the TE keyboard
unit, including the soft keys, except for the CE and the screen switch-over key.
The lock is only effective for the machine screen (iTNC - machine), the editing
screen (iTNC - editing) is not affected by the lock. Furthermore, this disabling
does not affect the keys on the MB machine operating panel.
This has the same effect as pressing the handwheel activation key on the
HR 420. Setting the new marker M4626 automatically results in setting
M4660 (HR 420 assumes control). If a corresponding message window
informing you about the current status on the screen is desired, it must be
displayed via the PLC program. Control must also be returned to the operating
panel via the PLC program.
Window upon activation of the HR 420
When the HR 420 is activated, a pop-up window appears on the iTNC,
indicating that the HR 420 has assumed control. This window is a special pop-
up window. The text color is defined in MP7366.1, and the window
background color in MP7350.
Please note that the feed rate or spindle speed set becomes higher or
lower depending on the potentiometer setting.
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