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sinara-hw / Metlino

microTCA carrier hub (MCH) Tongue 3 FPGA module with HVDCI and SFP
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Too high heatsink #65

Open kaolpr opened 4 years ago

kaolpr commented 4 years ago

We've assembled Metlino with N.A.T. MCH and tried to put it in the crate ...

IMG_20200121_110214149

It looks like the heatsink is too high.

In case of the full-size create it is rather inconvenience that is limiting in some ways, but does not exclude use of Metlino. We can just leave second PSU slot unoccupied.

Unfortunately, in case of R5 crate there is only one PSU slot and MCH slot is next to it so Metlino is mutually exclusive with PSU. Bad.

We can try to use a different heatsink that would have a lower profile, f.e. ATS-60004-C1-R0 or ATS-60002-C1-R0.

Then we need to be extra cautious with temperature and verify if in an expected use-case we're able to maintain acceptable FPGA temperature.

gkasprow commented 4 years ago

This heatsink needs machining. I can do that at the WUT.

kaolpr commented 4 years ago

But what exactly do you mean by machining? Machining fins won't help as mounting mechanism will still collide.

gkasprow commented 4 years ago

We can replace it with screws.

Pozdrawiam, G.Kasprowicz

From: Mikołaj Sowiński notifications@github.com Sent: Wednesday, January 22, 2020 10:53:36 AM To: sinara-hw/Metlino Metlino@noreply.github.com Cc: Greg Kasprowicz gkasprow@gmail.com; Comment comment@noreply.github.com Subject: Re: [sinara-hw/Metlino] Too high heatsink (#65)

But what exactly do you mean by machining? Machining fins won't help as mounting mechanism will still collide.

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kaolpr commented 4 years ago

We can try that, I'll bring one heatsink to WUT tomorrow.