Hello
I am planning my CNC Project
Now I am at the point where I have to find the right steppers.
My driver will be the G540 for sure - I think it is the best drive to start off - it will operate smooth and can´t be demaged (so far I read on the net)
My machine will have dual X axis - that means i have to power 4 Steppers
All steppers will be belt reduced to half of rpm (2:1)
I think I am on the safe side when i plan with belts and pulleys - If the System is to slow for the operation I can cheaply change to another ratio (so I think)
My ballscrew pitch will be 5mm
So now I come to my real question:
I have calculated that I will need at least 1.5 Nm torque per axis but I would like to oversize them to about 2-3 Nm - so I can use them when I plan to build a bigger machine.
But the Gecko G540 is speced with 3.5A per phase MAX!
One of the 3Nm steppers I picked out has 4.2A per phase but a Phase Inductance of about 2.5mH
Another 3Nm stepper has just 3 Amp per Pahse but an Phase Inductance of 6.8mH!
So now I cant mind which of those I should take?
On the gecko drive website the claim that the supplied voltage should be the the root of the Phase Inductance multiplied by 32.
So based on that calculation the 3 AMP stepper with 3Nm (has 6.8mH Phase Inductance) would come to 83 V supplied Voltage.
But the G540 can handle only 48V - so what would happen if I connect the 3AMP stepper to the gecko with just 48V supply voltage?.
Please help me Iam very confused at the moment(even more after writing this tread ;-)