On Tue, 23 Feb 2016 16:23:16 +0000 Mark Rivers <[email protected]>
wrote about RE: Motor examples missing devSequencer:
MR> This is from my startup script for an AG-UC8 8-channel controller. I
MR> only defined 5 of the axes for now.
Thanks again, this looks like it should be easily adaptable to our devices.
MR> One thing you need to be aware of is that the AG_UC8 is a very dumb
MR> controller. It works fine for doing incremental moves on any motor.
MR> However, it really only has 2 position registers. That means that
MR> when you do a move on channel 1, all of the odd number channels will
MR> appear to be moving, their position readback changes. Similarly when
MR> you do a move on channel 2 all of the even number channels appear to
MR> be moving. So absolute positions are meaningless with this controller
MR> if you use more than 2 axes.
And another big thank you for this warning, otherwise I certainly would
have started wondering about what is going on these, soon.
Do any solutions to this issue exist in software? I would think that one
could come up with epics channels holding the "real" position data (and
only changing them when the particular axis is actually used).
cu
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