Quote Originally Posted by JAZZCNC View Post
They expect the person fitting the unit to be competent or experienced enough to factor in that certain amount of Back Emf will be produced. It's common knowledge even at DIY level that safety factor is required which is often advised being around 10% less than Max rated voltage.

It's dangerous and foolish to assume that any manufacturer as built in "safety" factor and then Ignore the Warning Given in the Same Manufacturers Manual.!!

It's even MORE FOOLISH to thentry an Rubbish what someone with years of experience is telling you will happen if you run at those Voltages.

Now I should tell you to get stuffed you arrogant "Aussie Bastard" but in the spirit of helping people then I'll just say. Gecko after sales service is legendary so Contact Gecko tell them you your issue and they Will replace/repair the unit for you.

Oh and the Voltage Calculation is just that.? A Calculation based on the Motors parameters and should be used has guide line for Motor Voltage and doesn't mean just because your motor specs calculates that 50V is ideal voltage you can run at this voltage on the drives.!!
I'm sorry if I have offended you - I am just getting pissed off that I bought a package of components that don't work together, and I have tried your suggestion of a lower voltage - and it still does not work

However.
If what you say is correct, then why when I run 3 motors at 49 volts, does the system run absolutely flawlessly - no burning, no faults, no issues

Hook up a 4th motor, and fault occurs - directly proportionately to the 4 motor load I believe. Even at 42 Volts it still occurs. - that is 20% safety factor no + the manufacturers' unpublished safety factor that I didn't pluck from my aussie arse either - I gained through the wisdom of the internet


Product technical datasheet - from the manufacturer, and published all over the internet everywhere you purchase the unit from.

"Supply Voltage"

15 - 50 VDC.

That means Supply voltage 15-50VDC.... So far 42V - 50V does not work, so it probably is the current protection issue they identified in 2012