Mitsubishi Electric LD77MH, User Manual

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Chapter 5 Synchronous Control Initial Position
For the feed cam, calculates "[Cd.618] Cam position calculation: Cam axis feed current
value" by the stroke difference and searches again from the 0th point to the whole range.
If the corresponding position is not found even though the search process starts again,
the warning "Cam position calculation cam axis 1 cycle current value calculation disable"
(warning code: 834) will occur.
Example) When "[Cd.617] Cam position calculation: Cam axis current value per cycle" is
corresponding to the 0th point of cam data
0
(Cam reference position)
Cam axis length per cycle [Cam axis cycle units]
1
Search starting point
At the 0th point At the 256th point
Search order
[Cd.617] Cam position calculation: Cam axis
current value per cycle
• Searches until between the 255th point and the 256th point (last point) in order of the
cam data between the 0th point and the 1st point and between the 1st point and the
2nd point.
Example)
When "[Cd.617] Cam position calculation: Cam axis current value per cycle" is
corresponding to the 128th point of cam data
0
(Cam reference position)
Cam axis length per cycle [Cam axis cycle units]
1
Search starting point
At the 0th point At the 256th point
At the 128th point
2
Search order
[Cd.617] Cam position calculation:
Cam axis current value per
cycle
• Searches until between the 255th point and the 256th point (last point) in order of the
cam data between the 128th point and the 129th point and between the 130th point
and the 131th point.