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Mitsubishi Electric RD77MS2 User Manual Page 117

Melsec iq-r simple motion module.
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• Search from a value in the middle of the cam axis current value per cycle. (Cam data starting point = 0)
Cam axis current value per cycle
Cam axis feed current value
(Feed current value)
New cam reference position
Cam reference position
at starting the restoration
• Search from a value in the middle of the cam axis current value per cycle. (Cam data starting point  0)
Cam axis current value per cycle
Cam axis feed current value
(Feed current value)
New cam reference position
Cam reference position
at starting the restoration
• The first search is fails and a search begins for the second time.
Cam axis current value per cycle
Cam axis feed current value
(Feed current value)
New cam reference position
Cam reference position
at starting the restoration
If the first search fails, a second search may not be processed on the next cycle for a cam pattern with a feed
stroke that is smaller than 100% of the stroke as above.
The intended cam axis current value per cycle can be found in the first search, by setting or positioning the
cam reference position in advance.
[Pr.468] Cam axis current value per cycle (Initial setting)
Update the cam reference position
in the next cycle automatically.
[Pr.468] Cam axis current value per cycle (Initial setting)
Cam data
Update the cam reference
starting point
position in the next cycle
automatically. (Update the
cam data on 0th point.)
Once the restoration fails in the first search, the new cam reference position is
automatically updated to set "Feed current value - New cam reference position"
to be within the feed stroke amount, and the search process starts again.
Restore to the first feed current
value that matches.
Search from the value in the middle.
Restore to the first feed current
value that matches.
Feed stroke
Restore to the first feed
current value that is
found in the second
search.
5 SYNCHRONOUS CONTROL INITIAL POSITION
5.3 Cam Axis Position Restoration Method
5
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