Quote Originally Posted by dachopper View Post
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 - that is 20% safety factor no + the manufacturers' unpublished safety factor that I didn't pluck from my aussie arse either - I gained through the wisdom of the internet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
Didn't offened but does frustrate because I wouldn't waste my time posting info trying to help if wasn't sure of what I'm saying so when someone with very little experience then try's to tell me I'm talking bo~%&oxs does slighty piss me off.

Just about every drive on the market as specified operating voltage range just like Gecko have and in theory they should work fine if voltage is within that range.
Now where the problem comes from is the fact Steppers can be and are used in wide range of applications. Lots of these applications will be slow moving or light weight applications so will produce very little inertia or back EMF. Then in which case provided regulated 50V supply is used there won't be any issue.

However for CNC router this isn't the case and inertia pushing gantry from high feeds so will create back emf and push the voltage above the 50v safe limit.! . . Ahh but where using Regulated supply your thinking so no problem. . . . . .Wrong now you create another problem.?
Regulated supplies will have protection built into them so if voltage/current is feed back it clamps the supply and shuts down.! . . . Not good.

So you see it's not so black and white.

Now do your self a favor contact Gecko USA not your supplier and tell them the problem and I'm sure they will help you or advise what it could be.

Or better still do your self Bigger favor and sell it then buy Leadshine AM882 Digital drives and use Unregulated toroidal supply. The difference in machine performance will be night and day and you'll never have any issues.