On Sat, 01 Feb 2020 05:25:44 -0800, unclhank wrote:

On Friday, January 31, 2020 at 7:27:53 PM UTC-5, Eric Greenwell wrote:
Dave Nadler wrote on 1/31/2020 12:15 PM:
On Tuesday, January 28, 2020 at 9:59:56 AM UTC-5,
wrote:
How hard could it be?

Here's an update from another skilled practitioner:
http://www.streifly.de/news-e.htm

Any idea what the "electromagnetic disturbances" are disturbing?

Some controllers use Hall sensors for position sensing and phase
control.
Others sense back EMF generated by the motor to do the controlling. If
those signals aren't "clean", not so good stuff happens.
That is the "simple" explanation.
UH

Indeed, two problems: the above and what seems to have been an
overheating problem with the original controller.

A later post explains that they are switching to a better, heavier duty
controller, but it is physically bigger and/or needs a different mounting
system, so they have to redesign the system almost from scratch to fit
everything into the fuselage. Watch this space...


--
Martin | martin at
Gregorie | gregorie dot org