On Tue, 26 Mar 2019 at 06:35, Chris Albertson <albertson.ch...@gmail.com> wrote:

> The loops do need data.  They need a target position or a target velocity.
> These targets are sent across an SPI (or I2C or Ethernet or,..) interface
> from a Linux machine.  But you MUST de-couple the timing.   Linux can not
> be feeding one target number at a time.

Drawing the boundary becomes more difficult when you add in probing,
threading and spindle-synchronised motion.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916


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