Thank you I got it via e-mail too. Interesting the link pops up a nice profile of your yacht. Looks very nice. Panama
bound soon ? The competition to make electrics a common alternative will be based on value and reliability
. GB is stiff on the cost component so hopefully they sort out the reliability
of the system soon.
If this was a military contract
and it had to work every time, wonder how they would approach the execution of validation testing.
From personal experience with DC servo's I know the controller boards are critical. Due to cost even the best have not sorted out subcomponent capability. Military specs throw out 90% of components for not meeting requirements. Thus the $250 hammer, or $5 resistor. Firmare which GB is working not only sets limits, speeds, acceleration, but also error traps situations due to errant or lost
bits. Some portion of that firmware is diagnostic and if not working bad things happen. (even overheat) But bit errors are really hard to diagnose even for billion dollar companies. Thus the wait. But this won't be unique cause bit errors will change with variability in chip sets. The marine
community will not see all the possibilities for years..... I throw away motor controller boards and motors regularly until I get a match that works well enough. Some portion of the motor may be at fault or the controller and have not found anyone who make a definitive diagnosis on which it is, cause chipset verification is not done prior to assembly.
GB should return with motors and cards that are a match. Tony may be lucky as a good matched set usually works for a long time. When one goes wrong it can be a pain to resolve. Anyway that's my experience with DC motors, designing high speed process machinery. 40-50 DC drives on one converting line. I see a lot of them. Firmware is critical to manage a suboptimal combo of solid state electronics
. The companies that survive will be the ones who address this issue most effectively. Better chips or better firmware. Still like the idea..... so fingers crossed that they figure it out.
I would also suggest you ask them for 4-6 hours burn-in, running with normal load and if fail start burn-in again with new cards and/or motor. Then bring all of it to Valdivia. It saves me lots of initial misfortune from my suppliers. "The smoke test!" I also ask for a certificate in writing for temp, current
draw, max rpm
, etc. They should have that anyway to compare what happens on your boat. But GB should always supply that to any new purchase
, not a spec but a run test. What do you think ?