port problem

Howdy,

I'm having some trouble interfacing my PC to my set of G320's. I have one
drive fully wired to a servo, and I'm trying to use Mach2 to get the thing
to spin. I installed Mach2 and set it to output step to pin 1 of the
parellel port and direction to pin 2. After trying to jog the servo for a
while with no success, I decided to check into problems I might have with
the parellel port. The first obvious one I found was that it wasn't enabled
in the bios. . . so I of course enabled it, happy that I had most likely
solved the problem. Unfortunatly that wasn't it. My first question is if
there is any simple way to test output. Lacking a scope, I tried testing the
logic level of the direction pin as I "jog" Mach2 in different dirrections.
I would expect to see something around 0 volts for one direction and
something around 5 volts for the other. . . right? My other question I guess
is if there is some common problem I could be overlooking. Anyone have a
simple fix?

Thanks,
John

----- Original Message -----
From: <JanRwl@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, October 27, 2004 8:24 PM
Subject: Re: [CAD_CAM_EDM_DRO] rotary table as 4th axis


>
>
> In a message dated 10/27/2004 10:20:24 AM Central Standard Time,
> rogerstykle@... writes:
>
> has anyone here been able to convert a regular 6" 8" rotary table to
> cnc? I dont have a rotary table so I dont know if it's possible to get
> all or at least most of the backlash out. Im thinking about purchasing
> one but would like to see if you can do it before I spend the money.
>
>
>
>
> I once built a circuit to drive a stepper from a PC, the whole "set"
> connected to a Bridgeport mill's computer, making the 4th axis. The
> user-shop
> attached the stepper I provided to their 10 or 12" rotary table. I don't
> recall
> any discussion about backlash. I THINK there was no concern about this,
> as
> the accessory was always used rotating in ONE direction. Simple, really.
>
>
> [Non-text portions of this message have been removed]
>
>
>
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