On Thu, 21 Feb 2019 11:39:52 -0000, "Bert Coules"
wrote:

Brian Gaff wrote:

You say it's LED, normally they are LCD...

And so is this. A slip of the fingers and the brain.

Thanks to you and everyone else for the further thoughts. My first attempt
at a fix wasn't entirely successful: one of the displaced feet didn't stick
securely and came loose again as soon as I put any weight on it. I'll have
another go.

The feet/sensors strike me as a pretty weak part of the design. Their
springing is just four rather flimsy plastic sprues which connect the actual
foot to the securing flange.

Strain gauges don't have springs. My bathroom scales have feet
suspended on flat plastic spirals to allow them to move. They press on
the strain gauges underneath that are fixed to the solid glass base.

If it's just one of your feet that's come off, not the gauge
underneath, then you're probably just experiencing the scales
sometimes pressing on three feet instead of four.
--
Dave W