JST GH 1.25mm connector in Eagle.

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Pommie

Well-Known Member

Most Helpful Member

• Feb 28, 2015

• #1

I've tried to find a library in vain so resorted to draw my own. However, with a pin spacing of 1.25mm I can't find a hole/pad combination that will not give DRC errors. Anyone have any suggestion? Edit, the connectors are throught hole.

Thanks,

Mike.

 

ronsimpson

Well-Known Member

Most Helpful Member

• Feb 28, 2015

• #2

You might need to have very little pad around the holes.

 

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Pommie

Well-Known Member

Most Helpful Member

• Feb 28, 2015

• #3

If I use a pad small enough that there is sufficient clearance between pads then I get drill size errors no matter what size hole I choose. Looks like I may have to stick with 1.5mm connectors.

Mike.

 

ronsimpson

Well-Known Member

Most Helpful Member

• Feb 28, 2015

• #4

Under DRC you might have the smallest drill size set too big.
Also check clearance. How small can your board house go?

 

mvs sarma

Well-Known Member

• Mar 2, 2015

• #5

Pommie said:

I've tried to find a library in vain so resorted to draw my own. However, with a pin spacing of 1.25mm I can't find a hole/pad combination that will not give DRC errors. Anyone have any suggestion? Edit, the connectors are through hole.

Thanks,

Mike.

Click to expand...

hi Mike,
perhaps you can try with oval pads(shape-long)and adjust the drill and dia sizes.
i tried one JST connector from library of ver6.6.0 the actual spacing was 1.5mm
i reduced and re adjusted to 1.25 and changed pad shape. I defined the grid in mm and set as 0.25 and 0.125 as limits.
Please try once

 

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Pommie

Well-Known Member

Most Helpful Member

• Mar 2, 2015

• #6

The good news is I downloaded the dru file from https://dirtypcbs.com/ and all's well. The board shop can handle much smaller holes and clearances than the standard eagle ones.

Mike.

 

mvs sarma

Well-Known Member

• Mar 2, 2015

• #7

Nice Mike, all the best.

 

SneaKSz

Member

• Mar 28, 2015

• #8

Normally the PCB should (decent manufacturer) be able to be made with a clearance of 0.254mm so the pitch of the JST GH connector and the pads shouldn't be a problem.