Michael,Michael wrote: ↑Thu Feb 14, 2019 4:54 amThe problem has been identified. It seems the metal sheets from which the metal domes were stamped weren't cleaned properly.
An oil film prevents reliable contact. The domes and the contact area on the PCB can be cleaned, which significantly improves the reliability.
We encourage anybody having such issues to do so, but of course this is not what customers should need to do.
We're working with a new supplier for new foils with the metal domes. Once available replacement foils can be obtained.
I am really sorry, but every decent production guy knows that oil is an enemy to fight during process life !
* Assembly does not like oil
* Plastic does not like oil
* Glue does not like oil
* Safety does not like oil
* Customer does not like oil
We need oil for metal machining and treatment, that's ok, but also need to eliminate oil before next step in the process, it is kind of rule number 1, unless you work in Fish & Chips.
I think your production team needs some WCM/6 Sigmas/PDCA and so on training. These are basics in production today since the 80's.
Above all, when starting a new product/process, the first engeneering thing to do is some QFD (Quality Function Deployment), then writing the right SOPs (Standard Operating Procedures) and of course, having people well trained on their workplace.
I understand SwissMicros is not Hewlett Packard, but why do we love so much HP is because they did apply those simple quality rules back in the 70's.
I have a problem (not an issue) with my DM41L bezel and the second bezel sent by Michael did not solve anything and I've understood that I will have to find a solution by myself : a third bezel would not solve the root cause and I did not get an answer from SwissMicros despite my eMail with pictures showing that the second bezel is clearly not glued at all on the bottom edge.
So frustrating !
PS : There is another thread on the subject, people complaining about Voyager bezel. As someone wrote, it is not a cheap calculator, it's 130€ device !