[SOLVED] Why the Footprint of breakaway headers doesn't fit on PCB

[tajiknomi]

I am trying to place these male headers on my PCB.



I have searched for its footprint and print it out on paper but when i try to place the actual header on printed page, there is a small distance error which results in the header pins not actually fitting in the holes.



The footprint i am using is in pinhead library, and it actually matches the 2.54mm (0.1") pitch pin headers dimensions, therefore, i haven't bother myself to make footprint myself. What could be the possible problem ?

P.S: I have checked the printed footprint using a ruler and the measurement shows that PITCH i.e. center-to-center distance is a not accurately 0.1'' but instead ~0.098''.

 

[prairiedog]

The footprint may be fine. Your printer is probably scaling things. Check it is set to 100%. Print a line and see if the length is correct.

 

[tajiknomi]

Worked ! Thanks

 

[FvM]

It happens because your printer doesn't print exactly to scale. Check the printer menu options. You may have selected "fit to page". If not, there should be a percent scaling option, set it to e.g. 102 %.