3 ms·
> standard root cause analysis (did they even do FMEA?) would have forced them to find the problem the first time, not the second Not to mention that the stand
by exmadscientist 4y ago
> standard root cause analysis (did they even do FMEA?) would have forced them to find the problem the first time, not the second
Not to mention that the standard checklist for solving "why is this joint having problems" is "is it cold or does it get worse when we make it cold"....
> just realized their stated fix is to remove two resistors. Did they actually test the full effects of that change? Seems like there's a decent chance of a third head-scratcher a few months from now...
As a half-decent analog guy I can actually believe this. I can imagine a lot of ways something like this could fix a problem, though of course I haven't seen any schematics here.
- pclmulqdq 4y agoI'm guessing that a robotics company actually has very few analog-competent engineers. It may well have solved the issue if one of them had built an analog circuit. A lot of engineers don't think about operating conditions when they first learn to build circuits, and run them near the edge of their specified tolerances, so moving the component into a "comfortable" range would fix it. However, if they were working with a COTS component and took some resistors off that, I doubt it was actually the right fix.
- not_the_fda 4y agoAny experienced EE should know this stuff and one of the first questions on doing a design is "what is the operational environment?".