Ahhhhh. How right you are!
Thanks, Jim C
ben lipkowitz
<[EMAIL PROTECTED]
r.org> To
Sent by: "Enhanced Machine Controller (EMC)"
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e.net
Subject
Re: [Emc-users] Fw: Request for
02/15/2008 02:03 Fonts
PM
Please respond to
"Enhanced Machine
Controller (EMC)"
<[EMAIL PROTECTED]
sourceforge.net>
Actually, if you flip the arcs over so they go the right way it turns out
pretty good. Only the characters '[EMAIL PROTECTED]' have any problems, at
least on
the two fonts I examined so far (scripts.cxf and normal.cxf)
http://fennetic.net/pub/irc/cxf2g-scripts.png
AXIS is the fancy 3d GUI that comes with emc2. It has a toolpath preview
and you can execute/load/preview scripts that print g-code just by
pressing the reload button. Handy for developing stuff like this.
If you know C and regular expressions you'll find my script familiar
enough - if you have any questions about it I'd be happy to answer them.
Congratulations on getting your machine running.
On Fri, 15 Feb 2008, [EMAIL PROTECTED] wrote:
> There have been several things I have noticed in the CXF files.
>
> - All arcs in the fonts are done with counter clockwise moves (G3).
>
> - Some of the radius are large (parenthesis has a 13 unit radius).
>
> - There does not seem to be much thought into optimizing the commands
> from a motion standpoint.
>
> For instance, the number '0' is ten different arcs and they are not in
> any particular order. My code does not attempt to optimize anything, I
> just convert each of the commands to G-code and leave it be. The result
> is a lot of unnecessary Z axis moves that could be removed. That's
> something I will deal with later on.
>
> I am pleased with the results. The fact that I loaded EMC on a cheap PC
> and can run stepper motors via the parallel port is amazing. My formal
> education included automatic control systems (30+ years ago) and I
> understand enough about what is being done to be very impressed.
> During my initial setup, I discovered my motor drives were taking almost
> a millisecond to make a single motor step yet EMC was sending step
> commands out much faster (10 micro-seconds). That caused me to change
> to simple motor drivers and let EMC handle the actual motor phasing.
> That did the trick for me. It all works and now I have a really cool
> machine that does what I need.
>
> I understand the limitations of steppers vs servo systems and went with
> steppers just so I didn't have to deal with encoders. It's a little
> slower but much more simple. I like to keep it simple. It's magic to
> watch the machine run.
>
> I am not familiar with python. I have no idea what AXIS is either. So
> for now, I have to stick with C. I need to take a look at python just
> to learn about it.
>
> I am new to this group and appreciate all the support.
> Thanks to everyone!
>
> Jim Combs - Lexington Ky
>
>
>
>
>
> ben lipkowitz
> <[EMAIL PROTECTED]
> r.org> To
> Sent by: "Enhanced Machine Controller (EMC)"
> emc-users-bounces <emc-users@lists.sourceforge.net>
> @lists.sourceforg cc
> e.net
> Subject
> Re: [Emc-users] Fw: Request for
> 02/14/2008 09:12 Fonts
> PM
>
>
> Please respond to
> "Enhanced Machine
> Controller (EMC)"
> <[EMAIL PROTECTED]
> sourceforge.net>
>
>
>
>
>
> Inspired by Jim's example I decided to make a python script that converts
> cxf to g-code on the fly:
>
> http://fennetic.net/pub/irc/cxf2g.py
>
> http://fennetic.net/pub/irc/cxf2g.png
>
> It uses g2 and g3 for arcs. The interface is non-existent right now; just
> edit the script and open it with AXIS.
>
> -fenn
>
> On Thu, 14 Feb 2008, [EMAIL PROTECTED] wrote:
>>
>> I converted normal.cxf to normal.ngc
>>
>> I chose to make the arcs using a series of line segments (G1) using 5
>> degree units vs using the G3
>> command.
>>
>> Here is a link to the file.
>>
>> http://wiki.linuxcnc.org/uploads/normal.ngc
>>
>> I will convert the rest of the fonts tonight.
>>
>> Jim Combs - Lexington, Ky
>
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