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Messages - Briancnc

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1
General Mach Discussion / Re: Having a small problem with mach3
« on: November 20, 2008, 05:54:20 PM »
Sorry for the delay in followup. I appreciate your help. Anyhow I ran it again using suggested settings of cvangle to 35 and dist tolerance of .01 but still having issues. As you will see below the parts cut perfectly but it was choppy, feeds from 200IPM down to 25IPM at curves it didn't handle it how I would expect other than that it followed the toolpath perfectly.

I guess what I'm getting at is that I'm having a hard time finding a balance between acceptable constant velocity and necessary cv. I want it to go fast because the machine is designed to do so but the software skips the beat because the machine can't make those corners without either slowing down or cutting them. And the strange part of all of this is until now I have never had to play with CV settings, everything I have ever cut has been perfect; mach seems to always have compensated for corners and curves slowing down when necessary. Where am I going wrong with this?  Thanks again!





2
General Mach Discussion / Re: Having a small problem with mach3
« on: November 12, 2008, 10:32:35 PM »
anyone :D?

3
General Mach Discussion / Re: Having a small problem with mach3
« on: November 12, 2008, 03:50:27 PM »




Some more, well that explains it. Now i know its not my machine..

4
General Mach Discussion / Re: Having a small problem with mach3
« on: November 12, 2008, 03:45:44 PM »
Well I just investigated further. Check out how it deviates from the programmed toolpath. Wow, what could cause that? Never seen mach color outside the lines! lol





5
General Mach Discussion / Re: Having a small problem with mach3
« on: November 12, 2008, 03:34:31 PM »
Ger I have nothing on the settings page on for cv if any at all, neither in the gen config either but it is green lit in the CV mode (not dwell). Rich I'm not sure its necessary to test with a pencil, I know the feeds and speeds this machine can do; I mean I have cut quite a bit with this machine before with no problems. And frankly I haven't changed any of the settings. It's just strange because one; it shows in my vcarve preview that it's perfect, it shows in my mach preview that it is cutting normal yet it doesn't. There's just no consistency to it really; it will cut fine in certain areas and weird in the same type of area elsewhere. Sometimes I think these machines take a mind of their own.


6
General Mach Discussion / Re: Having a small problem with mach3
« on: November 11, 2008, 10:46:37 PM »
Gerry and Rich thanks for your replies. I will look into the CV settings tomorrow hopefully I can narrow it down. I just haven't had a problem with this setup in mach3 before; that's what got me. Maybe I inadvertently turned something on? will have to check. Thanks so much.

7
General Mach Discussion / Re: Having a small problem with mach3
« on: November 11, 2008, 07:57:33 PM »
Thanks Rich.

Recut tonight with mach3 arcs atc gcode post as usual (this is the PP I have been using since I have been using vcarve and mach3, probably more than 2 years now) and it ran the same. Also note in the pics its just a random pocket path, also check out those stepdown marks and how it cut those sharp corners and made them round even though vcarve prview shows them sharp.

Really strange, never seen this before on my machine.







8
General Mach Discussion / Re: Having a small problem with mach3
« on: November 10, 2008, 09:56:50 PM »
My cad file doesn't look like that, that's a gcode generated by VcarvePro out of a gcode post in that program. Even if there are those little line segments that doesn't explain the little pocketing anomaly nor the little nips towards the corners. But appreciate you looking at the gcode.

9
General Mach Discussion / Having a small problem with mach3
« on: November 10, 2008, 08:54:12 PM »
Well this originated from a vectric forum thread but it seems the problem isn't in the vcarvepro file its in the post processor or the gcode/settings I have in mach3. It's two part, one that the pockets aren't complete and they are cut weird and all the same way. Second there are knicks or bumps at the end of each corner, like it took almost 1/16" about 1" long off the edge of each of the parts.

I stopped the program after the two parts cutout on the bottom so I could rectify the pockets without rerunning the entire program. Anyone have any idea what's going on? I attached screens pics and the tap gcode file. Thanks!

http://vi01.com/cnc/mach/4thaxispartsUPDATED.tap gcode file (gcode ATC post processor from vcarvepro)












10
Sorry to not get back to you right away. I checked and it said demo version, weird not sure how it reverted backwards? Reinstalled license and it loads up gcode fine! Thanks for your help guys.

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