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accuracy is off
« on: January 29, 2018, 09:27:48 AM »
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
Re: accuracy is off
« Reply #1 on: January 29, 2018, 09:40:03 AM »
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.

Re: accuracy is off
« Reply #2 on: January 29, 2018, 09:57:05 AM »
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
Re: accuracy is off
« Reply #3 on: January 29, 2018, 10:00:14 AM »
can you elaborate on axis calibration?

Offline Tweakie.CNC

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Re: accuracy is off
« Reply #4 on: January 29, 2018, 10:02:35 AM »
Hi Mike ,

If you post the Gcode file we can verify that it should cut the part correctly.

Tweakie.
KEEP SAFE !
Re: accuracy is off
« Reply #5 on: January 29, 2018, 10:04:44 AM »
I have never done that before

can you tell me how please?
Re: accuracy is off
« Reply #6 on: January 29, 2018, 01:18:21 PM »
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.
Re: accuracy is off
« Reply #7 on: January 29, 2018, 02:05:59 PM »
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
Re: accuracy is off
« Reply #8 on: January 29, 2018, 02:12:32 PM »
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.

Re: accuracy is off
« Reply #9 on: January 29, 2018, 02:40:54 PM »
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?