Ok, thanks. Here I was trying to mill a pocket. Pocket start/corner is located X20 Y20 from Zero and pocket dimension is also 20x20mm.

But after milling, the left and buttom side of my square pocket is about X21 Y21 from Zero when I messure it with a ruller. I didnt messure exactly, because its very clear that its not where it shoul be.

The pocket has the right dimensions.

Im sure its my fault, but I dont know where to find it.

The code is generated with Vcarvepro. I dont know if its changing when loaded to Mach with Machs offsets and fixtures.

I mean I have never changed any offsets and fixtures, because Im not sure how to use them - maybe here something is wrong.

I was milling like this for 2 years, but first now, when I had a piece of material with exact dimensions I realized that something is wrong. I was always cutting things out, so I didnt see it.

( Pocket 2 )

( File created: Saturday, May 07, 2011 - 12:38 AM)

( for Mach2/3 from Vectric )

( Material Size)

( X= 100.000, Y= 100.000, Z= 5.000)

()

(Toolpaths used in this file:)

(Pocket 2)

(Tools used in this file: )

(2 = End Mill {3 mm})

N100G00G21G17G90G40G49G80

N110G71G91.1

N120T2M06

N130 (End Mill {3 mm})

N140G00G43Z20.000H2

N150S5000M03

N160(Toolpath:- Pocket 2)

N170()

N180G94

N190X0.000Y0.000F1200.0

N200G00X28.025Y31.975Z2.000

N210G00Z1.000

N220G1Z-2.000F600.0

N230G1X29.000Y31.000F1200.0

N240G1X31.000

N250G1X31.975Y31.975

N260G1X31.000Y31.000

N270G1Y29.000

N280G1X31.975Y28.025

N290G1X31.000Y29.000

N300G1X29.000

N310G1X28.025Y28.025

N320G1X29.000Y29.000

N330G1Y31.000

N340G1X28.025Y31.975

N350G1X26.500Y33.500

N360G1X25.525Y34.475

N370G1X26.500Y33.500

N380G1X33.500

N390G1X34.475Y34.475

N400G1X33.500Y33.500

N410G1Y26.500

N420G1X34.475Y25.525

N430G1X33.500Y26.500

N440G1X26.500

N450G1X25.525Y25.525

N460G1X26.500Y26.500

N470G1Y33.500

N480G1X24.000Y36.000

N490G1X23.025Y36.975

N500G1X24.000Y36.000

N510G1X36.000

N520G1X36.975Y36.975

N530G1X36.000Y36.000

N540G1Y24.000

N550G1X36.975Y23.025

N560G1X36.000Y24.000

N570G1X24.000

N580G1X23.025Y23.025

N590G1X24.000Y24.000

N600G1Y36.000

N610G1X21.500Y38.500

N620G1X38.500

N630G1Y21.500

N640G1X21.500

N650G1Y38.500

N660G00Z2.000

N670G00Z20.000

N680G00X0.000Y0.000

N690M09

N700M30

%