Mitsubishi Electric MELSEC iQ-R RD78G4 - 3.2 Create Cam Data

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3 CAM FUNCTION
3.1 Control Details for Cam Function
Cam reference position
The cam reference position is calculated as shown below.
■Stroke ratio data format
Cam reference position = The preceding cam reference position + (Cam stroke amount  Stroke ratio at the last point)
■Coordinate data format
Cam reference position = The preceding cam reference position + Output value corresponding to "Input value = Cam axis
length per cycle" - Output value corresponding to "Input value = 0"
Create cam data for two-way cam operation as shown below.
■Stroke ratio data format
Create cam data so that the stroke ratio is 0% at the last point.
■Coordinate data format
Create cam data with the same output value for the point where the input value is 0 and the input value is equal to the cam
axis length per cycle.
t
t
Cam axis position
value per cycle
Command
position value
Cam reference
position
(At 3rd cycle)
Cam reference
position
(At 2nd cycle)
Cam reference
position
(At 1st cycle)
Stroke ratio data format:
Cam stroke amount × Stroke ratio at the last point
Coordinate data format:
(The output value corresponding to "Input value = Cam axis length per cycle")
- (The output value corresponding to "Input value = 0")
t
t
Cam axis position
value per cycle
Command
position value
Cam reference position
(Does not change because of the stroke
ratio 0% and output value = 0.)