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[SOLVED] Etching an ExtensionBoard USB-B for Gen7 Electronics

Posted by xoan

xoan

[SOLVED] Etching an ExtensionBoard USB-B for Gen7 Electronics
January 24, 2013 04:02PM

Registered: 11 years ago
Posts: 64

Hi,

I'm trying to follow the steps in Generation 7 Electronics wiki page in order to minimize the amount of etching copper, but I'm in trouble with to do this in the ExtensionBoard USB-B (as well in the Gen7 Board v1.5) due to the soldering pads for MCP2200. I'm not able to connect them to de GND plane by using THERMAL tool, neither by draw a route from those pads directly to GND rectangle.

Edited 1 time(s). Last edit at 01/24/2013 05:06PM by xoan.

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NoobMan

Re: Etching an ExtensionBoard USB-B for Gen7 Electronics
January 24, 2013 04:46PM

Registered: 13 years ago
Posts: 1,352

Arent they already connected to the gnd plane? 6th pin from the lower left looks like a thermal for a gnd plane pin, and the unconnected ic pins seems to have direct path to it already - isnt the light blue background a gnd plane? Just asking, maybe i didnt see it right.

Edited 1 time(s). Last edit at 01/24/2013 04:49PM by NoobMan.

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xoan

Re: Etching an ExtensionBoard USB-B for Gen7 Electronics
January 24, 2013 05:06PM

Registered: 11 years ago
Posts: 64

Well, solved by editing .pcb file directly, and change the clear size for _CTS and Vss pads to 0.

BTW, thanks smiling smiley

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Traumflug

Re: [SOLVED] Etching an ExtensionBoard USB-B for Gen7 Electronics
January 25, 2013 07:12AM

Registered: 13 years ago
Posts: 7,616

Thermals for rectangle pads is a missing feature in gEDA/pcb. The usual solution is to draw GND tracks from the pad to the next GND plane. In case of Gen7 this means to not remove GND tracks touching pads.

Generation 7 Electronics	Teacup Firmware	RepRap DIY

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xoan

Re: [SOLVED] Etching an ExtensionBoard USB-B for Gen7 Electronics
January 25, 2013 07:56AM

Registered: 11 years ago
Posts: 64

Oh, thanks! It looks better smiling smiley