Overview Of Cam Operation - Mitsubishi Electric R32MTCPU Programming Manual

Overview of cam operation

Current feed value of cam axis
The current feed value is calculated as shown below.
■Stroke ratio data format
Current feed value=Cam reference position + (Cam stroke amount  Stroke ratio corresponding to cam axis current value per
cycle)
■Coordinate data format
Current feed value = Cam reference position + Output value corresponding to cam axis current value per cycle
When the cam axis current value per cycle is in the middle of the defined cam data (Stroke ratio data/Coordinate data), the
middle value is calculated from the nearest cam data.
Cam axis current
value per cycle
Cam data
1 resolution or between
2 coordinates
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"
Cam axis current
value per cycle
Cam reference
Current feed value
position
(At 1st cycle)
Stroke ratio data format:
Cam stroke amount Stroke ratio at 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")
Calculate the middle value
from the nearest cam data.
Cam reference
Cam reference position
(At 3rd cycle)
position
(At 2nd cycle)
t
t
5.1 Control Details for Cam Function
5 CAM FUNCTION
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