
9.SPINDLE FUNCTION B-63783EN-1/01
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subsequent G84.2 commands are executed, the control mode for the
spindle is already set to position control mode, so the control mode
change processing in 5 is not performed.
If one of the commands explained below is specified in G84.2 mode,
the spindle control mode is changed from position control mode to
speed control mode, then the RTAP signal is set to 0. Then, the next
operation is performed. When the RTAP signal is set to 0, the PMC
must set the torque limit signal TLML to 0. (Only the FANUC analog
spindle amplifier requires that a torque limit signal be manipulated.)
(1) A canned cycle other than G84.3 is specified. For example, G81
is specified.
(2) The hole machining canned cycle is canceled. That is, G80 is
specified, or a G code of group 01 such as G00, G01, or G02 is
specified.
NOTE
The reason why the spindle stop confirmation signal
SPSTP must be set to 1 after at least 400 msec in 3 is
to allow sufficient time for the spindle motor to be fully
excited. This is because there is no means of
confirming the completion of spindle motor excitation.
The time required for excitation varies depending on
the spindle motor and amplifier. As a guideline, 400
ms is assumed.
The timing chart for the procedure described above is shown below.