Mitsubishi Electric QD77MS User Manual page 92

Cam reference position
The cam reference position is calculated as shown below.
(1) Stroke ratio data format
Cam reference
=
position
(2) Coordinate data format
Cam reference
=
position
Cam axis current
value per cycle
Feed current value
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")
Create cam data for two-way cam operation as shown below.
(1) Stroke ratio data format
Create cam data so that the stroke ratio is 0% at the last point.
(2) 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
The preceding cam Cam stroke
+
reference position amount
Output value corresponding
The preceding cam
+ to "Input value = Cam axis
reference position
length per cycle"
Cam reference Cam reference
position position
(At 1st cycle) (At 2nd cycle)
3 - 8
Chapter 3 Cam Function
Stroke ratio at
the last point
Output value
- corresponding to
"Input value = 0"
t
Cam reference
position
(At 3rd cycle)
t
t
t
Cam reference position
(Does not change because of the
stroke ratio 0% and output value = 0.)