Mitsubishi Electric Q172DSCPU, Programming Manual

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8 AUXILIARY AND APPLIED FUNCTIONS
8.8 Cam Position Calculation Function
The cam position is calculated by the CAMPSCL instruction (Cam position calculation)
of Motion SFC program with this function. This function can be used to calculate the
cam position for the synchronous control initial position before starting synchronous
control.
Refer to the "Q173D(S)CPU/Q172D(S)CPU Motion controller (SV13/SV22)
Programming Manual (Motion SFC)" for details of CAMPSCL instruction.
(1) Example
The following shows the procedure for synchronous position alignment, in a
synchronous system where cam axes 2 and 3 are synchronized with the cam
axis current value per cycle of axis 1.
1) Calculate the cam axis current value per cycle using this function based on
the current feed value and the cam reference position of axis 1.
2) Calculate the cam axis current feed value of axis 2 with this function based
on the cam axis current value per cycle that was calculated in 1).
3) Calculate the cam axis current feed value of axis 3 with this function based
on the cam axis current value per cycle that was calculated in 1).
4) Execute positioning on axis 2 to bring the cam to the cam axis current feed
value which was calculated in 2), and also on axis 3 to the cam axis current
feed value which was calculated in 3).
5) Start synchronous control on axis 1, 2 and 3 with the current feed value
restoration mode. Use the cam axis current value per cycle that was
calculated in 1) for the cam axis current value per cycle (Initial setting).