Tool offset issue

[TonyD]

Creating a simple rectangular groove "Y" distance 6.25", "X" distance 1.0" using a 0.25" end-mill bit.
Would expect the centers of the groove in the "Y" axis to be 6.0". However instead of +- 3.0 the G-code
has -2.97 and 3.03; the difference total is 6.0.

Checking the path with a laser (not cutting) confirms that the cut is offset in the plus "Y" by 0.03.

Why the offset?

Any help would be appreciated.

Tony

[IslaWW]

Post the file, we can diagnose the issue

[TonyD]

( Pocket .8962 Rectangle )
( File created: Friday March 16 2018 - 03:54 PM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 25.250, Y= 9.875, Z= 0.750)
()
(Toolpaths used in this file:)
(Pocket .8962 Rectangle)
(Tools used in this file: )
(1 = End Mill {0.25 inch})
N100G00G20G17G90G40G49G80
N110G70G91.1
N120T1M06
N130 (End Mill {0.25 inch})
N140G00G43Z4.0000H1
N150S12000M03
N160(Toolpath:- Pocket .8962 Rectangle)
N170()
N180G94
N190X0.0000Y0.0000F50.0
N200G00X0.4481Y-2.9700Z2.0000
N210G00Z0.2362
N220G1Z-0.0010F20.0
N230G1X-0.4481F50.0
N240G1Y3.0300
N250G1X0.4481
N260G1Y-2.9700
N270G00Z2.0000
N280G00Z4.0000
N290G00X0.0000Y0.0000
N300M09
N310M30
%

[ger21]

He means the Aspire file.

[TonyD]

Sorry... I Dont know how to post the CRV. I tried copy/paste but it didn't work.

[TReischl]

Simple question: Did you actually make sure the rectangle is 6.25 inches long X 1 inch wide?

You stated in your post that it was 1 inch wide, yet it says something very different in the heading of your code.

[Rcnewcomb]

I Don't know how to post the CRV.

When you reply to a topic:
1. Click "Upload Attachment" which is located below the message window
2. Click "Choose File" and a file selection dialog box appears.
3. Select the file you want (it must be smaller than 2MB or 3MB)
4. Click on "Add the file"