On 1/14/2012 10:32 AM, Bob von Knobloch wrote:
> I am attempting to install emc 2.4.6 on an HP Pavilion t3000 AMD PC.
> I have an existing older version, running on an older PC (it wasn't up
> to the upgrade).
> So, using the old hal& ini files, I constructed the new version, adding
> "loadrt probe_parport" to the hal file.
> But, I get no output from the parallel port.
> Hanging a 'scope on pin 7 (my z-axis step pin), I see it stuck at 'low'.
> A winblows installation that was on the PC can print via the parallel
> port OK and the parallel port test files ptest.hal& ptest.xml work fine
> (I can toggle the pins and see the scope trace move ok).
>
Bob:
Maybe I'm misreading this but you seem to be saying that the parallel
port works fine with EMC2 ("ptest.hal & ptest.xml work fine").
If that is so, then the problem lies in your (new) configuration. You
can nail this diagnosis by loading Halscope and looking at the signals
you are sending to the parport. If they do toggle as you run G-Code then
I don't understand what's going on. If they don't, you have some
detective work to do in your hal and ini files.
There's some but not a lot of latency data on AMD systems on the Wiki,
but what there is suggests you'll get good performance with yours (which
I suppose is based on an Athlon 64 something or other). I hope you'll
post your results to the Wiki.
Good hunting.
Regards,
Kent
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