Hi Kirk,
So there is no default usage for each of the 12 outputs and
4 inputs?
I'm thinking about a 3-axis small mill with limit switches on the two X and
Y axis plus spindle on/off and two coolants.
Outputs
3 Step and 3 Direction = 6
1 Common Enable, 2 Coolant and 1 Spindle = 4
Total 10 outputs
Inputs
2 Left Limit and 2 Right limit = 4
Total 4 inputs.
Will the .ini file allow this combination?
What magic do the Pico Systems or Pluto-P controllers do that enables them
to run faster than the standard Parallel Port?
My project is a PCB design with 3 stepmotor drivers and the breakout all on
the one board, for a small CNC ready mill I have had sitting under a bench
for three years.
Thanks
John
----- Original Message -----
From: "Kirk Wallace" <[EMAIL PROTECTED]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Sent: Sunday, October 19, 2008 11:26 AM
Subject: Re: [Emc-users] Parrallel Port Breakout Board
> On Sun, 2008-10-19 at 10:14 -0600, John Harris wrote:
>> Hi,
>> Does EMC2 still support the use of a single Parallel Port? If
>> so where can I find documentation on the functions handled by a single
>> port system and how this is done?
>> Thanks
>> ____________________________________________________________
>> John Harris
>
> It depends on what you are trying to do. With a typical single port, you
> have twelve outputs and four inputs:
>
> http://www.linuxcnc.org/docview/html//hal_drivers.html#sec:Parport
> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EmcKnowledgeBase
>
> If you have three axes that are controlled by step and direction, that
> will take up six outputs. If you are going to use limit and/or home
> sensors, I think that anywhere from two to nine or more inputs will be
> needed. So a single port could run a CNC machine, but it might not have
> all of the features you want. It depends on the details of your design.
> The assignment of each pin is controlled by what you enter into
> your .ini file.
>
> A Pico Systems or Pluto-P controller would give you more speed and I/O
> in a single port solution.
>
> Kirk
>
>
>
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