Molex KK connectors: wrong pitch?

Hi,

I´m trying to use the Molex KK-156 headers from the con-molex lib on my board. From their title I expected them to have the 1,56" pitch,

but if I use the measuring feature in EAGLE it always tells me that the pitch is 1".

Am I doing something wrong, is it an error in the lib (my con-molex.lib is dated 12/13/2011)?

Hope somebody can help me.....

Herbert

0 element14jamie over 10 years ago

Hello Herbert,
Welcome to the element14 Community, we hope you are enjoying it so far!! I will move this question over to the CadSoft EAGLE Support area as it is a better fit.

Thank you,

Jamie
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0 Former Member over 10 years ago in reply to element14jamie

Thanks Jamie

Of course in my question I was referring to .156" and .1". Sorry for the typos.
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0 shabaz over 10 years ago in reply to Former Member

Hi Herbert,

I see of the order of 0.156" (I used KK-156-14 component as an example). You likely have the grid set to 0.1" and your measurements are of that granularity. Reducing the grid will give you the granularity you want.
By the way, you could measure it exactly by inspecting the library and clicking on 'info' for each pad that makes up the component (this will reveal
the X and Y co-ords for the pad).
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0 Former Member over 10 years ago in reply to shabaz

I reduced the grid to 0.01 inch but for some reason the measurement for this part still shows 2.54 mm between to pins?? I´m confused......
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0 shabaz over 10 years ago in reply to Former Member

This is what I see when the ref is set close to a pin, and then I measure to the adjacent pin.
I used part KK-156-14 from con-molex.
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0 Former Member over 10 years ago in reply to shabaz

hmm, I´m doing the measurements in the circuit view, not in the board view - is that the wrong approach? Sorry for those newbie questions.....
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0 shabaz over 10 years ago

Hi Herbert,

That's correct, it is only done in the board view (i.e. physical view). For the schematic view (i.e. logical view), the grid setting should never be changed (it affects net connectivity when you place nets) so you will need to change back to the default setting of 0.1 in the schematic view.
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0 autodeskguest over 10 years ago in reply to Former Member

On 25/03/14 22:51, Herbert Koller wrote:
hmm, I´m doing the measurements in the circuit view, not in the board
view - is that the wrong approach?

Yes.

The "circuit view" is more properly called the "schematic editor"

From OED:
schematic
(Of a diagram or other representation) symbolic and simplified

This editor deals with the schematic design, which is a symbolic
representation of the circuit's function, and has no connection to the
physical shape or dimension. Indeed for many components the "symbol" on
the schematic might map to one of a dozen or more "packages" you can
choose between.

So when you consider that, it's fairly clear that you can't measure the
gap between physical package pins on the schematic!
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0 Former Member over 10 years ago in reply to autodeskguest

Hello folks,
thank you very much for all your help in getting better with EAGLE.
You helped me a lot. And soory again for those newbie questions.
Herbert
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