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MaslowCNC / Electronics

This is the main control board for the Maslow CNC router. It is designed to mate with an Arduino Mega 2560
https://www.MaslowCNC.com
The Unlicense
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Heatsink substrate #20

Closed JDogHerman closed 6 years ago

JDogHerman commented 7 years ago

I might be wrong in this, but would it be good to add a thermal substrate copper pad for the H-Bridge ICs to sit upon?

BarbourSmith commented 7 years ago

I think it's a great idea. We actually had one in an early version of the PCB, but I took it out because our PCBA people were having enough trouble and I wanted to make things really really really easy for them. It might be time to put that back in. The ground plane runs right under each chip to make doing exactly that easy.

JDogHerman commented 7 years ago

Sorry I opened this and then looked closer at the traces and saw that the traces run underneath the ICs.

dmouw25 commented 7 years ago

Is it possible to Reopen this? These packages are designed to dissipate most of the heat through slug on the bottom of the package. If you notice, the datasheet does not give thermal values for junction to case. You would likely get better thermal performance with a redesigned PCB and no heatsink.

JDogHerman commented 7 years ago

Reopened as a feature request.

blurfl commented 6 years ago

I believe this was addressed in the v1.2 layout. @JDogHerman, @dmouw25 does that look correct to you? If so, we could close this.

BarbourSmith commented 6 years ago

I second that it was a great suggestion and has been added