New start

[Nr1madman]

I personally would go down the conventional tried and tested route with a toroidal transformer and rectifier with caps.

Im leaning towards that route...
There is no way there could be thats big caps in the drives.. so I guess that if I go ac my toroidal transformer will get a beating? Especially since its a 500VA and not overspeced for my application?

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[Desertboy]

Im leaning towards that route...
There is no way there could be thats big caps in the drives.. so I guess that if I go ac my toroidal transformer will get a beating? Especially since its a 500VA and not overspeced for my application?

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I considered using AC with my my AM882h's but when one of them blew and I replaced it I got an AM882 which is DC only.

I might be wrong here but I think if the drive is rated for AC you wouldn't need caps they're only there to smooth out the DC. That said it wasn't hard I was scared of the PSU build and yes I did blow one up ;) but it really was drill a couple of holes, bolt stuff on and solder 6 wires just double check you wiring and don't plug the wires into the rectifier the wrong way round.

[Nr1madman]

I considered using AC with my my AM882h's but when one of them blew and I replaced it I got an AM882 which is DC only.

I might be wrong here but I think if the drive is rated for AC you wouldn't need caps they're only there to smooth out the DC. That said it wasn't hard I was scared of the PSU build and yes I did blow one up ;) but it really was drill a couple of holes, bolt stuff on and solder 6 wires just double check you wiring and don't plug the wires into the rectifier the wrong way round.

Haha ;)

Well Im not scared of the process.. but I got a shitload of smaller caps so alot more than 6 solderpoints :D
Im about halfway through but I cant solder with any kids around.. they just have to touch everything ;)

I figured since the drives provide the motors with dc then some internal conversion must happen in the drives if using ac supply...?

Anyway.. it will look cool if I finish so I guess I will stick to the original plan!

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[Nickhofen]

You must go with DC so I can copy the plans and make my DC power supply!

[Neale]

If I had a drive with the option of AC input, I would go with that. It will have an appropriate internal rectifier/capacitor setup, and actually the capacitors do not need to be that big. You use bigger capacitors when the PSU is feeding multiple drives as you are smoothing with a bigger current demand, and it also provides a bit more isolation between drives so demand from one will not affect the others. Stepper drivers really do not need a very smooth supply voltage anyway - because of the way they work, they are pretty tolerant of supply voltage ripple.