On Mon, 28 May 2007, RogerN wrote:
> Date: Mon, 28 May 2007 18:25:08 -0500
> From: RogerN <[EMAIL PROTECTED]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <[email protected]>
> To: [email protected]
> Subject: [Emc-users] Help with Mesa & encoders
>
> I connected a spare encoder to my MESA 5i20 & 7i33 board, counts fine,
> worked first try...
>
> I've been trying to get the actual lathe encoders to count and so far,
> no luck. I get a velocity reading when I move the ballscrews by hand,
> but the position readout doesn't change.
>
> Is there a way to use hal meters or scope to show the state of my
> encoder channel A, B, & Index? I tried setting the scope up to show
> inputs 0 - 7 from the Mesa board but it didn't show anything. Would
> this be because the inputs are configured for encoders and not Inputs?
> Do I need to make an alternate configuration to see the individual
> encoder channels as Inputs. Unfortunately I don't have things set up to
> be easy to work on, I can't hold my meter leads on terminals and reach
> the encoders to turn them.
>
> Thanks!
> Roger Neal
> [EMAIL PROTECTED]
>
>
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In the HostMot4 configuration (Which is what I assume you are using),
there is one 50 pin connector (24 I/O bits) dedicated to servo control
(4 sets of PWM,DIR,ENA,A,B,IDX)
The other 2 connectors are simple I/O
If your lathe connectors are connected to the motion control connector, you
cannot read the A,B,IDX signals from the I/O ports, however the A,B,IDX
signals are readable from the Counter Control Register (Bits 0,1,2 = A,B,IDX)
but I dont think the CCR is readable via the driver
Peter Wallace
Mesa Electronics
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