On 14 November 2010 00:32, Peter Cauchy <[email protected]> wrote:

> The USB is being used only for the 5v for OPTO isolation power (5.12v)

> The signal for dir and pulse is from the parallel port and low logic is
> 1.2v and high is 3.3v-4.6v.

What voltages do you see on the DIR pin with everything set up?

Can you measure the current from the dir terminal to the p-port pin
(the signal needs to travel through the mulitmeter, ie be in the
circuit. Sorry if I am insulting your intelligence there).


-- 
atp

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