On 13 June 2010 21:48, Todd Freeman <compusl...@gmail.com> wrote:
>
> The problem is, I have no clue how to
> configure EMC to work with this homegrown driver. I built the driver
> circuit exactly as shown, using two NTE2018's. Since this driver
> doesn't actually contain a stepper motor driver chip, but rather a
> gaggle of Darlingtons, it will not respond to the normally simple
> direction and 'go' pins,

Indeed not, but there is a very straightforward way round that, as the
EMC steppgen function has a number of different configurations,
several of which are 4-wire pattern generators. Look at the
documentation at
http://www.linuxcnc.org/docview/html//man/man9/stepgen.9.html
(Especially stepgen types 5, 6, and 9)

You will have to manually edit the HAL file to use those types, but
the rest of a stepconf wizard created config should work (of course,
you will also have to assign the p-port pins)

-- 
atp

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