How to add new part

[vj1]

Hi,

from time to time there is a missing part from the library and i need to add it.

When doing so i take care of the PCB design rules, but i have no idea about the assembly rules.

So, my question is: what are the important aspects for a successful assembly of the new part?

My main concern is related to automated pick & place.

For example:

Where should the origin be placed? On pin 1? On the center of the part? On the center of the body?

Which orientation should it have? Pin 1 on the top-left corner?

Is the part height important?

Other aspects i am not aware of?

Regards.

[Thea]

Hi there,

There are many competing standards on how one should create a component library.
But we use/require the conventions laid out by KiCad as listed under klc.kicad.org

Generally:

• The first pin should be located in the top left corner.
• Polarity markings should follow the IPC-7351B rules, also highlighted in this article from us: Component Orientation and Polarity Rules for Assembly
• The origin should be in the center of the component or where highlighted by the manufacturers. (Exceptions may apply for super specific parts.)
• Stencil apertures should follow the recommendations by IPC-7525 we also have an article on that: Stencil aperture design

Currently we do not read the component height from the EDA data.

I hope this overview helped