Machsupport Forum
General CNC Chat => Share Your GCode => Topic started by: Sam on July 23, 2009, 06:59:21 PM
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So I was thinking......How can you have the Roadrunner, without Wile E.???? It's like cookies without milk. It just don't make any sense. Never did like that damn bird, anyhow. Wile E. always had the cool James Bond gadgets!! So, anyhow, I made up a Wile E. Coyote. It has lots of arcs and corners, so it should be a good one to learn about the CV options for your machine.
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SAm you are a the MAN,
Thanks (;-) TP
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Well done Sam.
I like it a lot. ;D
Always thought the roadrunner was not an ideal first gcode because it has mostly double lines.
Great stuff, Greg
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Thats great Sam. Good job.
Brett
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SO Sam when are you going to redo the road runner?? WILE needs someone to chase.
(;-) TP
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And an Acme rocket would be cool. ;D
Brett
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Thanks for the compliments. A rocket would be a nice easy thing to do. (it's hard work being as lazy as I strive to be)
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;D
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Nice one Sam. :D
Tweakie.
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I will kill two birds with one stone. A rocket, and a bird. In my quest for a decent pic, I came across something I must share, even though it's not really CNC related. It is fascinating, none the less. Amazing stuff by Hyungkoo Lee. http://thenoisingmachine.wordpress.com/2008/10/05/the-skeletons-of-cartoon-characters/ (http://thenoisingmachine.wordpress.com/2008/10/05/the-skeletons-of-cartoon-characters/)
I have not ran this file, so pay a bit more attention when cutting it. A dry run wouldn't hurt.
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Bravo Sam............. Bravo! Thanks. That is an interesting link too.
Brett
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hehehe nice!
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i followed a few links from tha page and found this
http://www.youtube.com/watch?v=ap1co5ZZHYE
sometimes the web just sucks.
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You are not wrong there Chris.
Tweakie.
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And an Acme rocket would be cool. ;D
Brett
http://www.flyingcritters.com/rocket_subaru.html
My own Acme rocket.
Vince
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WOW !!! ;D ;D ;D
Tweakie.
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Sorry but I just couldn't resist it.
Tweakie.
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HEHE....great photochop, Tweakie.
Give us more details on your rocket, Vince.
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Here's a chop I done of a friend in Afghanistan.....
He just returned there a couple months ago for another tour, and I asked him if they had reserved his truck and coon dawg for him. He just laughed.
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HEHE....great photochop, Tweakie.
Give us more details on your rocket, Vince.
It's made for carrying a hang glider. The nose cone is off a Cessna 177RG, the body is 14" spiral HVAC duct, and the engine nozzles are paper cups painted black on the outside and red on the inside. I have more people than I can count on both hands ask me where I launch my rocket.
Vince
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Hi Sam,
How did you produce the code for Wile.E.Coyote please ?.
It does truly run at a constant velocity on my machine - unlike some of the code I make, which has so many straight lines instead or arcs, that it slows down considerably.
This was never a problem with conventional engraving but is a real headache with laser engraving which relates speed and depth.
Tweakie.
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I used splines in Solidworks, then used Mastercam for the toolpath. If memory serves correctly, I had to change some settings in Mastercam to get the desired results. I think finding out the different drawing methods that worked was half the battle. How are you doing your drawings?
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Thanks for the information Sam.
I am still in the dark ages using Adobe Illustrator and Acme Trace Art or TurboCad.
Tweakie.
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Na, dark ages is chisel and hammer. If it weren't for my role in my day job, I wouldn't be as fortunate, for sure. What do you use for the g-code creation?
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Hi Sam,
I export as HPGL (which is where the arcs become the many straight lines) then convert this to the GCode with a simple converter program.
Tweakie.
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I have just built a CNC router and am just getting ready to make my first "cuts". I would like to carve this image, but have a question. It is probably a trivial one, and I will try looking it up on my Mach 3 information, but this file has an NC extension, not a tap extension. Does that mean that I need to do some post processing on it before it is ready to run?
Sawdust John
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I should have said that most g codes that I have seen (admittedly, not too many) are either .tap files (in Mach 3) or .txt files -- what is a .nc file? I also tried changing the extension from .nc to .tap and "dry running" it (cutting air). I found three things -- 1/ it is apparently in metric units and I am set up in inches, so it is quite large. I can fix that with scaling in Mach 3 (I believe). 2/ It generates some error codes (end of arc, not coincident with start of next arc -- a close approximation to the actual message.) 3/ When I "run from here" in several of the segments, my machine just describes many circles -- with various starting points -- and an occasional straight line segment here and there and a few Z axis motions. What am I missing here? At this point, my learning curve is very steep.
Thanks, Sawdust John (but no sawdust yet with my new shop built CNC Router)
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Hi John,
If you place a G21 at the start of the code then it will run in metric units. Then use the X and Y Scale DRO's to scale the image to the size you require.
The .nc file extention will load OK into Mach (select all file types) or, by all means, change the extension to .tap or .txt as you prefer.
You need to change your IJ Mode to the opposite of what you currently have set (Config ; General Config ; IJ Mode)
Hope this helps, Sawdust will soon be everywhere ;)
Tweakie.
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Hello John,
The units are imperial (inch). The G20 at the top of the code determines this. The "toons.NC" file was meant to fill a piece of notebook paper. I think "WILE E COYOTE.NC" is around 6.5" X 4.5".
As far as the errors are concerned, that was totally my fault with sloppy code. There should be a "G91.1" in there after the first "G90", which sets 'incremental I-J-K mode'.
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Thanks so much for your replies. I just put a coat of clear finish on my table top and so will not be able to actually make sawdust for a few more hours, but I will go to my shop now and do these config/edits and try another dry run.
Sawdust John
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You do not need to manually set the I-J mode in (Config ; General Config ; IJ Mode), if the G91.1 is in the code. You can do both if you like, but it is not required. Whatever is easiest for you.
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Sam,
Thanks -- I figured that out -- I am using this g-code to self-learn something about g and m codes. I also edited the code to turn on -- and off -- my spindle and to modify the feed speeds. One thing that I have not figured out however, is that my routed image is a mirror image of the one you show on page 1. (X axis is reversed). I will most likely figure it out myself after some additional time. In the meantime, thanks for your advice -- my learning curve is rather steep at this point. The proverbial good news/bad news story!!
Thanks,
Sawdust John
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I have not posted a response lately, since I have been busy learning the system and g-codes in gereral, but I wanted to close out my earlier comment. I modified the g-code by adding a G51 X-1.0 block at the beginning of the g-code. Wiley and Road, now are milled out in standard format (not mirror image). There is probably another way to accomplish this, but so far have not figured it out if there is.
MAKING SAWDUST NOW!!!
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Hi John,
Sounds like you have your X axis configured incorrectly.
In Config / Ports and Pins / Motor Outputs - change the tick for a cross (or visa versa) in the 'Dir LowActive' box for the 'X Axis' then click 'Apply'.
Tweakie.
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Thanks Tweakie,
That was not it, but it was something equally dumb. When I set up my X & Y coordinates and limit/homing switches, I arbitrarily set the home point at the lower left hand corner of my table -- not realizing at the time that when I did that, my physical layout was a mirror image of the X & Y directions shown on the tool path screen of Mach 3. I now have it set so my home is at the lower right of my table. As Homer Simpson would say: DUUUUUUHHH!
John
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Hi John,
I am pleased you have got it sorted - you are certainly progressing up the learning curve at speed now. ;)
Tweakie.