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R_2818 footprint help #2435

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aris-kimi opened this issue Aug 30, 2020 · 2 comments
Open

R_2818 footprint help #2435

aris-kimi opened this issue Aug 30, 2020 · 2 comments

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@aris-kimi
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aris-kimi commented Aug 30, 2020

Hi everyone.

I need help in order to create footprint from here.

ds:
εικόνα

By SMD_chip_package_rlc-etc.py script and editing size_resistor.yaml , pads created are not as datasheet recommends.

Also by editing smd_chip_resistors_smd.csv and running script, footprint created was ok but has main differences from other resistors.

How should i proceed?

Edit my confusion is, should this be named as R_2818_7146Metric as current resistors are with the default pad layout presented ,
and R_Shunt_Vishay_WHSP2818 with _ViaReception and _PadReception ( maybe? )
So 3 footprints total.

@cpresser
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I think there is no need for a _Via?? variant. That is something the pcb-designer should take care of.

You already found the correct generator. The pad-sizes it outputs are different from manufacturer recommendations because it builds them according to the IPC spec.

Are there other 2818 shunts available from other vendors? If yes, we should start to compare them.
A quick search only resulted in this: https://www.seielect.com/catalog/sei-hcsm.pdf

Currently I think a generic R_2818_7146Metric is the way to go.

@aris-kimi
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Thanks @cpresser , I need a few more days to finish with some issues. Weekend i think i will find the time.

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