SparkFun Forums 

Where electronics enthusiasts find answers.

Questions about the BatchPCB service

Moderator: robacarp

By KreAture
#139679
Can you fake two layers extra in the datafiles to get 4-layer rules?
My design requires the tolerances of 4-layer but my free cad soft can only do 2-layers.
There should be a checkbox in the order to select designrules...

While one is at it, a checkbox to expedite the order would save you some emails too.
#139680
To ansver my own question.
To fool the DRC-bot into using 4-layer rules, add two empty.g2 and empty.g3 containing the following:
Code: Select all
G75*
G70*
%OFA0B0*%
%FSLAX24Y24*%
%IPPOS*%
%LPD*%
%AMOC8*
5,1,8,0,0,1.08239X$1,22.5*
%
%ADD10R,0.0236X0.0354*%
%ADD11C,0.0071*%
%ADD12R,0.0248X0.0500*%
%ADD13R,0.0500X0.0248*%
%ADD14C,0.0118*%
%ADD15R,0.0984X0.0984*%
%ADD16C,0.0060*%
%ADD17C,0.0250*%
%ADD18R,0.0000X0.0000*%
%ADD19C,0.0189*%
%ADD20C,0.0094*%
%ADD21R,0.0512X0.0591*%
%ADD22C,0.0080*%
%ADD23C,0.0100*%
%ADD24C,0.0150*%
%ADD25C,0.0065*%
M02*
Note, there is a bug in the DRC-bot making it fail pads even though they are abowe the limits. Even abowe 8/8.
It seems to only affect very small pads where rounding of the pad corners cause the remaining straight to be shorter than 6 mils
The workaround for me was to make these pads square.
Last edited by KreAture on Sun Feb 12, 2012 3:26 pm, edited 1 time in total.
#139689
Won't that method going to really jack up the price of your board?
Wouldn't it be a LOT cheaper to just add a handful of square inches to the board to fit the fatter traces?
#139691
The board is $8 instead of $2.5 and I don't really mind as the alternative is my other supplier at $200.
My other supplier would give me 5 panels of 90 boards pr panel in 5 days though. I just don't need $200 worth of junk if they don't work...

Also, I actually may need to go 4-layer so then the layers will come by themselves. Routing is tight...
Pic of my board attached...
You do not have the required permissions to view the files attached to this post.
#144732
KreAture wrote:The board is $8 instead of $2.5 and I don't really mind as the alternative is my other supplier at $200.
My other supplier would give me 5 panels of 90 boards pr panel in 5 days though. I just don't need $200 worth of junk if they don't work...

Also, I actually may need to go 4-layer so then the layers will come by themselves. Routing is tight...
Pic of my board attached...

Off topic, but what program did you use for the 3d model?
#144733
Latest version of Eagle CAD can export to Google Scetch UP with the script EagleUP (downloaded seperately).
This gives you a model with all objects seperate so they can be edited and modified, even textured.