Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: mike2700 on January 29, 2018, 09:27:48 AM
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Hi I have a 4x4 woodworking cnc router from cncrouterparts, I am having an issue with accuracy, I have had the machine about 5 years and have never had this problem before. just recently my parts started coming out 1/8" under size
I first checked the soundness of my machine for loose parts etc. that was not it, I rechecked my program to see if I had the right bit loaded that was not it. my test consisted of cutting a 3 inch hole and a three inch plug in 3/4 in MDF
the plug came out 2 7/8" and the hole 3 1/8" ?????? HELP
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Verify that your axis calibration is correct.
Ran fine for 5 years ?
How did you generate the code for the test ?
Looks like a .125" cutter without inside or outside offset selected. Cut ON the contour.
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I used V carve pro to generate the code, my cutter was 1/4 end mill, there were no offsets selected
yes ran fine for five years, did another test by cutting a 6" square and a 4" hole centered inside the square came out 5 7/8" outside and 4 1/8" inside otherwise its very precise edges are square and the part itself is square
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can you elaborate on axis calibration?
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Hi Mike ,
If you post the Gcode file we can verify that it should cut the part correctly.
Tweakie.
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I have never done that before
can you tell me how please?
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Post that last test code along with the actual diameter of the tool you used.
Just copy and paste the generated code in your next post.
Quick calibration. Command a move of several inches, measure the actual distance ... compare.
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overloaded I have it on my desktop but cant seem to get it over here
I tried the code button and the email button
nothing works
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Use the Reply button, not the quick reply.
Below your message is Additional Options , Attach: Browse to your .tap or .txt file and attach it.
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for some reason I cant get it to attach, I have the file right next to the box that says choose file but nothing I do will let me attach it
it ie a txt file so it should attach?
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You have to Browse to the file and select it. No drag and drop.
Or, you can open the file with your editor (notepad), select all, copy and paste in right in with your message.
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I will try again ......
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I have no Idea why it came out like that
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That code will cut a square in a square.
6x6 OD, 4x4 ID .. provided it is a .25 dia cutter.
You should go through the axis calibration procedure (in the manual)
Verify that your tool info is entered correctly in Vectric sw
See that no scaling is in effect (G50 to cancel)
No "wear" is entered for the tool.
Lets go from there.
Russ
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Hi Russ Thank you for your help, I went online to the tutorials for mach3 and found and repaired my problem
the problem was in motor tuning, they were both set to 2 and should have been set to 0
I reset them to 0 and retested and I got 6" outside square and 4" inside square PERFECT
But how could they have gotten off in the first place? I remember having ti do a force shut down
on my computer would that do it???
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Many things are possible... SO many variables.
Just keep it in mind in case you run into it again.
Happy you found it !
Russ