Mitsubishi Electric MELSEC iQ-R RD78G4 User Manual page 83

Cam data starting point
This setting is only valid for cam data using the stroke ratio data format.
The cam data point corresponding to "Cam axis position value per cycle = 0" can be set as the cam data starting point.
The default value of the cam data starting point is 0. (The cam axis is controlled with cam data starting from the 0th point
(stroke ratio 0%).)
When a value other than 0 is set for the cam data starting point, cam control is started from the point where the stroke ratio is
not 0%.
The cam data starting point is set for each cam data. The setting range is from 0 to (cam resolution - 1).
Cam axis position
value per cycle
Cam reference
position
(At 2nd cycle)
Command
position value
Cam reference
position
(At 1st cycle)
Cam data
starting point
At the 0th point
At the last point
Timing of applying cam control data
■Stroke ratio data format
If "[Pr.439] Cam axis length per cycle", "[Pr.440] Cam No." or "[Pr.441] Cam stroke amount" is changed during synchronous
control, the new value is accepted and applied when the cam axis position value per cycle passes through the 0th point of
cam data, or is on the 0th point.
The cam reference position is updated when the cam axis position value per cycle passes through the 0th point of cam data.
■Coordinate data format
If "[Pr.439] Cam axis length per cycle" or "[Pr.440] Cam No." is changed during synchronous control, the new value is
accepted and applied when the cam axis position value per cycle passes through 0, or is on 0.
The cam reference position is updated when the cam axis position value per cycle passes through 0.
t
Cam reference
position
(At 3rd cycle)
t
3 CAM FUNCTION
3.1 Control Details for Cam Function
3
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