[chbot] Knob shafts / extensions and insulation

[Robin Gilks]

> On Thu 01 Sep 2016 23:42:51 NZST +1200, Helmut Walle wrote:
>
>> Double heat shrink the metal shaft? (And use a plastic knob)? Would
>> that work for you?
>
> I'm trying to design + build things in a way that they pass EN60950
> testing. It's good practice, among other reasons.
>
> All the standard shafts and knobs are either flattened off or have a
> knurly pattern. No way heat shrink would fit, and the flattened off
> knobs have screws that would punch the shrink.
>
> It might be easier to earth the shaft. Or use a plastic one, I've found
> them now. Or use galvanic isolation, approved components like PSUs,
> relays, opto-couplers are easy to come by.

Have you tried the model shop for 6mm Delrin or nylon rod? Assuming the
shaft you are extending is 6mm (1/4") of course!!

-- 
Robin Gilks