2 x Toroidal transformers question

[Proteus]

Not sure what your meaning.? If they have 2 x 60Vdc outputs why would you rectifie them.? Do you mean 2 x 60Vac.?
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No, they have an output(rectified) of 60Vdc(58,2Vdc), and 40Vac before the rectifiers.
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If so then you'll still have trouble because the voltage after being rectified will be too high for the AM882.

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The AM882 can withstand 80Vdc With a typical supply voltage of 68Vdc.

[Proteus]

By the way, why does everyone advice lineary PSU instead of high quality switching rectifier PSU`s ?

[Proteus]

By the way, why does everyone advice lineary PSU instead of high quality switching rectifier PSU`s ?

I got my hands on a high quality Eltek Flatpack2 2KW adjustable 53,5 to 67Vdc handling 30 Amps at 65Vdc, Ripple=150mV PP/2mV psophometric.
Hmmm... Can`t see any reason not to use that one..

[m_c]

I got my hands on a high quality Eltek Flatpack2 2KW adjustable 53,5 to 67Vdc handling 30 Amps at 65Vdc, Ripple=150mV PP/2mV psophometric.
Hmmm... Can`t see any reason not to use that one..

Mostly because when decelerating hard, stepper drives dump power back into the power supply.
With a linear supply it (more specifically the capacitor) will absorb the current and it will cause a slight power rise until things stop decelerating, and provided things have enough headroom voltage wise, it won't be an issue.
Whereas with a SMPS, they don't have a big capacitor, so the same deceleration can cause a noticeable power spike. Depending on the SMPS, it may shut down, go into fault, or simply go pop, but the same voltage spike can quite easily cause the stepper drives to go overvoltage and release the magic smoke.
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Off course, you can avoid the issue by implementing reverse current dumps (the gecko drive website used to have a schematic for one), but it's added things to go wrong.

[JAZZCNC]

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The AM882 can withstand 80Vdc With a typical supply voltage of 68Vdc.

Yes After fitting a few hundred I know this and exactly why I posted. 60Vac after being recitied will give aprox 83Vdc which will release the magic smoke.!!

Edit: Ok I see you replied with No 60vdc but was included in my Quote so didn't see. Thou Still doesn't explain why you mentioned Rectifying.?

[Proteus]

Yes After fitting a few hundred I know this and exactly why I posted. 60Vac after being recitied will give aprox 83Vdc which will release the magic smoke.!!

Edit: Ok I see you replied with No 60vdc but was included in my Quote so didn't see. Thou Still doesn't explain why you mentioned Rectifying.?

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I was suggesting having 2 PSU Connected in parallell after the rectifier bridge. However that is not the best idea, but maybe better than having both 40Vac outputs Connected to 1 bridge.
But what do you think about using a high quality switched PSU With the specs i mentioned Dean ?

[JAZZCNC]

.But what do you think about using a high quality switched PSU With the specs i mentioned Dean ?

Thanks Moray saved me some typing. . . . . . . . Nothing else to add to what M_C said.