I tried and used the TCL preprocessor and I think it does the same things as
O-Word, but it has far more possibilities and it is really more readable
than O-Word, but O-word is read internally by the interpreter while with the
TCL preprocessor and the filter for .gcl files a complete G-code program
will be sent to EMC2.
I think that the point is not to have a command to move directly the
machine, (like $emc->move({ X => 0})) because the same result can be
achieved using the common G0 or G1 g-code commands in the preprocessor, I
think that the real point is, as told also by Sven, to have a way to get
feedback from emc2. The ability to get a feedback from EMC2 (or HAL) while
working, would permit the interactive machining as requested by Ron.
for example:
if (hal.pin.0 == true)
G0 X20
else if (hal.pin.1 == true)
G0 Z20
ecc.ecc.
Regards
Manfredi
My websites: www.m24-pro.com
www.emc2cnc.altervista.org
>From: Sven Mueller <[EMAIL PROTECTED]>
>Reply-To: "Enhanced Machine Controller (EMC)"
><emc-users@lists.sourceforge.net>
>To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
>Subject: Re: [Emc-users] Interactive machining
>Date: Sat, 18 Aug 2007 05:47:53 +0200
>
>Jeff Epler schrieb:
> > AXIS can automatically execute a filter program when loading a
> > machinable file. You can also use the NML messages for issuing "MDI"
> > commands to feed your program in line-by-line. (I just verified that,
> > at least in the development version of emc 2, this doesn't kill blending
> > altogether, though it's likely that blending degrades more quickly when
> > fed by MDI than by file)
> >
> > Personally, I lean towards using filters because then I benefit from the
> > preview plot.
> >
> > Using tcl as a gcode preprocessor: http://axis.unpy.net/01167315565
> >
> > To make ".gcl" files openable in axis, put this in your inifile:
> > PROGRAM_EXTENSION .gcl TCL-preprocessed gcode
> > gcl = /path/to/gcode.tcl
> > and make gcode.tcl executable
>
>While these preprocessors look really useful, they don't support what
>Ron thinks of, which would be a programming language which is able to
>feed commands to emc2 as well as get feedback from emc2. Assuming a perl
>binding, this could mean
>
>=====================================================================my
>$emc = new CNC::EMC2;
>$emc->move({ X => 0, Y => 0, Z => 10 });
>$emc->straight_probe( { Z => 0 } );
>if ($emc->probe_tripped) {
> printf("%d %d %d\n",$emc->trip_x,$emc->trip_y,$emc->trip_z);
>} else {
> # do something else
>}
>my $dialog=new Dialog;
># do whatever is needed to open a dialog which allows jogging
># of all axes as well as direct entering of target positions,
># to select {max,min}[xyz]
>
>surface_scan($minx,$miny,$minz,$maxx,$maxy,$maxz);
>...
>=====================================================================
>
>See the difference? _Many_ people, including me, are certainly more
>comfortable at writing complex code in a more readable language than
>G-Code. And at that, probably also a language easier to understand at
>first glance that TCL (I don't understand your gcode.tcl filter script,
>even though I can read C, C++, Pascal, Ruby, PHP, Perl, lua, Basic, ...
>easily).
>
>Speaking of the above: lua would probably be a really good choice if you
>want to implement a scripting language inside emc2.
>
>Regards,
>Sven
>
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