On Tue, Sep 08, 2015 at 08:30:13PM -0500, Jon Elson wrote:

> Now, you COULD figure out the right number by modulo 
> division and work it that way.

You know, I hadn't thought about this.  The original design for
spindle-synced motion was when we had single precision floating
point positions, which get really ... (what's the opposite of
smooth?) crunchy when you get far away from zero.  Resetting after
the spindle was perhaps running at 10krpm for while before you tap
was a VERY important thing to do.

We now have double precision floating point for hal floats, so I
think the consideration is gone or mostly gone, but a spindle could
conceivably run fast and for a LONG time in one linuxcnc session
(weeks?  months?) and always in the same direction.

I wonder how long you'd have to run before orient (which doesn't
reset, with the current design) works badly...?

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