Powering 3 45Ncm Nema 17 Stepper Motor 2A 4-wire (not CNC)

[Lee Roberts]

Dunno if this unit Jonathan is working on maybe of use: Build Log: Servo Drive and VFD with vector control

I'm sure I read a discussion where he was able to put custom firmware on it for someone, could be wrong.

[cropwell]

Would 3 of these be the sort of thing you are looking for ? You might only need 1 if the motors are all at the same speed.
http://www.ebay.co.uk/itm/Stepper-mo...YAAOSwIgNXlrJf

You would still need some cheap drivers and a power supply though.

Rob

[Fivetide]

Would 3 of these be the sort of thing you are looking for ? You might only need 1 if the motors are all at the same speed.
http://www.ebay.co.uk/itm/Stepper-mo...YAAOSwIgNXlrJf

You would still need some cheap drivers and a power supply though.

Rob

Yeah Rob that's what I was thinking, but I don't know if I can run all three off a single 3A supply or I'll need separate ones per motor. I'll post results as soon as I have a test ready.
I mean what could possible go wrong ?? lol :)

[m_c]

It'll depend on how well matched the motors are, and how much load each one is under.
If they're all identical motors with similar load (and/or a good safety margin), then it shouldn't be a problem. All you can do is try it, as the worst that's likely to happen is motors stall, or one heats up.

[Neale]

Is your question about whether a single 3A supply would be enough? If you are not looking for much torque from the motors, then most drivers will have a "max motor current" setting which you could wind down to, say, 1A. I'm assuming single power supply/multiple drivers here, of course. Problem is greater if you are using a switch-mode power supply as these often have a "hard" current limit at their max rating so can effectively switch off just when you need most current at peak load. Old-fashioned linear power supplies are much more forgiving of peak loads. Or wind down max motor current a bit more, or use a bigger or multiple power supplies.

[m_c]

Neale, my understanding is fivetide wants the 3 motors to run from a single driver..

[Fivetide]

Neale, my understanding is fivetide wants the 3 motors to run from a single driver..

That's true .. I would like to manually vary the speed of all three motors simultaneously. Toque maybe a factor in the future
There are 40A versions of the Motor controllers for not much money. My understanding of power supply is limited, if I attach 3 motors that draw 2A's each onto a 40A supply will the motors only draw 2A's of the 40 or will the power supply push 13A's to each motor.. ?