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Old October 13th, 2019, 11:29 PM   #7
Peter Nachtwey
United States

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Join Date: Apr 2002
Location: Vancouver, WA, US
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Originally Posted by _Dock_ View Post
Next question, someone enlighten me as to why this would be done?
The problem is how to synchronize to one encoder so that all input devices are in phase.

This is common or it use to be. In our case it use to be very common before we could put 32 axes in one controller. Before we were limited to 8. Usually the OEM would use one controller per machine center. In the case of saw mills, there are many sawing stations synchronized to a feed chain that is turning an encoder. Everything is synchronized to the feed chain encoder. The sequence starts when the leading edge of the log or wood triggers a photo cell.
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