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Mitsubishi Electric RD77MS2 User Manual Page 54

Melsec iq-r simple motion module.
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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
Feed current
position
(At 1st cycle)
value
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.
Cam axis current
value per cycle
Feed current value
3 CAM FUNCTION
3.1 Control Details for Cam Function
Cam reference
Cam reference
position
position
(At 3rd cycle)
(At 2nd 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")
Cam reference position
(Does not change because of the stroke
ratio 0% and output value = 0.)
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