Re: [CAD_CAM_EDM_DRO] EMC on HP 6730 weird parallel port noise / not working

John Johnson wrote:

>Hi All,
>
>I have installed BDI EMC from here:
>http://www.isw.uni-stuttgart.de/personen/t_franit/echtzeitlinux/
>download.html on my HP Pavilion 6730 (600MHz Celeron, 128MB, 60+8GB).
>It doesn't work. Specifically, if I turn on my controller (L297/L298
>drivers, stepper motors), the Y axis steps about 1/8 turn about twice a
>second. The other axes won't move. The problem doesn't seem to be EMC,
>it seems to be Linux. When I watch the data lines on the parallel port
>while booting Linux, there are all kinds of signals on the lines. Even
>when it's going through the check list at the beginning of the boot
>(where it says Starting..(whatever)..[OK]). When I boot Windows 95,
>there is no noise on the lines. Also, the parallel port (378) isn't
>reported in the control panel for Linux, but it is in Windows. How
>weird is that?! If anyone has any suggestions, I'm all ears. I'm
>several days into this project, and it's driving me nuts.
>
>

Right. It senses something on the parallel port and tries to identify it.
There are several drivers that you may have to tell it to leave out.
Specifically, parport, parport_pc, and lp. These are all kernel modules.
Just do : rmmod lp and such to remove them. parport will need to be
removed last, as the other two use it. If you want to leave these drivers
out, check /etc/modules or /etc/modules.conf, depending on the kernel
you are using.

Jon