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 Post subject: D-Shape pads
PostPosted: 08 May 2012, 13:15 
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Joined: 05 Dec 2011, 10:51
Posts: 13
Could be added this kind of pad shape?

Now adding a circle al the border of the rectangular pad is tedious, and can not be used in the parametric tool.

Regards,

Javier Escanciano
Konekted Intelligence


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 Post subject: Re: D-Shape pads
PostPosted: 10 May 2012, 08:49 
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Technical Support

Joined: 14 Jun 2010, 06:43
Posts: 1501
Hi Javier,
You can use polygonal pads. But arc section of D-stype pad should be approximated with multiple small lines, that is tedious.


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 Post subject: Re: D-Shape pads
PostPosted: 24 May 2012, 17:32 
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Joined: 05 Dec 2011, 10:51
Posts: 13
Thank you, Alex.

I supposed this answer. It's a workaround that I'm trying to use.
If an oblong is a rectangular pad with 2 circles in the extremes, why Diptrace could not have a D-shaped which have only one circle? Is it for the center of the compounded object?
TI recommends this shape for the QFN package over the rectangular one, specially for the smallest.

Regards,

Javier Escanciano


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 Post subject: Re: D-Shape pads
PostPosted: 28 May 2012, 09:19 
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Technical Support

Joined: 14 Jun 2010, 06:43
Posts: 1501
You can use oval pads in spite of TI recommendations. Different vendors recommend different patterns for the same packages. Follow to IPC-7351 standard and everything will be fine.


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 Post subject: Re: D-Shape pads
PostPosted: 28 May 2012, 18:33 
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Joined: 05 Dec 2011, 10:51
Posts: 13
Thank you again.

This approach has been taken, you advise it before I publish the "workaround".

We are spending a lot of time and effort in differentiate CAD Library (external and independent) and EDA Library (imported in Diptrace), and now we have various layers for mechanical pin, recommended footprints (various), thermal pads mask (various) and pad shape chosen to import in Diptrace. Each in a different layer and made in blocks when possible. Prior to import to Diprtrace, a copy of the DXF is made, cleaned, blocks exploded, and then imported in Pattern Editor.

We are having some problems in the way Diptrace interprets shapes and solids. For example, a circle in silkscreen is a empty shape, and the same layer is a filled circle if imported in mask layer (workaround importing as mask, converted in ski, but is a time consuming). Circles have no center and radio properties. Not dots (as reference), blocks, imported dimensions supported. Precise coordinate move, align, copy, ... as in a CAD soft unified in all Diptrace apps. Why not a unique environment sharing tools?

As said before, CAD must be unified and improved (layers, hatches, transparency, absolute and relative input commands, ...), but also has been said that this will be upgraded in the next summer release. We have a big expectation about this, and we will wait until the new release before complain.

And please, editable symbols in schematic editor, specially for MCU and other programable logic.

Well this must be in feature request, but we are working hard with Diptrace, and wish this kind of improvements make all more productive.

Feel free to edit or move the post if it exceeds of the scope of the initial post.

We are making a list of feature requests that will be posted in the near future, and suppose that some of them will be covered yet in the next release.

Thanks in advance.

Javier Escanciano


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 Post subject: Re: D-Shape pads
PostPosted: 29 May 2012, 07:45 
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Technical Support

Joined: 14 Jun 2010, 06:43
Posts: 1501
Hello Javier,

Thank you for your feature requests. We know most of listed features, but we can't do them at once. Sorry, we can't implement the features in the beta version because we spent time on export 3D view, online DRC, improved ratlines and others.


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