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General Mach Discussion / Re: erratic pulse train fix?
« on: June 11, 2013, 12:18:17 AM »
I have the system working.
I switched XP from ACPI to "Standard PC" and the pulse stability was good when I used the test utility. I set the BIOS to disable ACPI too. I also found that the BIOS offered EPP and ECP modes for the parallel port, plus a mode called EPP + ECP. The latter does the trick to get bidirectionality, though I think EPP alone is supposed to do this.
MACH3 still shows occasional deviations from a steady pulse stream and the "charge pump" fault detector on the G540 trips. I have switched that facility off.
The machine now runs with a smooth jog and I'm currently exercising it with 100,000 random G00 vectors in a 48" x 48" x 6" volume.
Incidentally, the board has a crappy Via/S3 graphics processor but I doubt that it is causing any of my problems.
I switched XP from ACPI to "Standard PC" and the pulse stability was good when I used the test utility. I set the BIOS to disable ACPI too. I also found that the BIOS offered EPP and ECP modes for the parallel port, plus a mode called EPP + ECP. The latter does the trick to get bidirectionality, though I think EPP alone is supposed to do this.
MACH3 still shows occasional deviations from a steady pulse stream and the "charge pump" fault detector on the G540 trips. I have switched that facility off.
The machine now runs with a smooth jog and I'm currently exercising it with 100,000 random G00 vectors in a 48" x 48" x 6" volume.
Incidentally, the board has a crappy Via/S3 graphics processor but I doubt that it is causing any of my problems.