[Grom1]

I have a Nema 34 size of motor.It has a 6 amp per phase curent of consumption.White paper tells that a power supply must hase the 2/3 rated curent of motor i.e. 4 amp.But in microstepping mode is two windings of motor to connect to the power supply at the same time i.e. power supply must hase 12 amp of load current.What does power supply uses in may application in this case?

[ger21]

The 4a per motor is all you will need.

[ViperTX]

So, you'll use max. current when you are stepping at max. speed and when you are holding a position (hmmmmm.....I should look at some stepper charts). Anyway if you have a larger supply then required it certainly won't hurt.

[ger21]

Quoted from the White Papers at Geckodrive.com:

"The easiest factor in choosing a power supply is its current rating. The current rating of the supply is based on your motor choice. The drive will always draw less than 2/3 of the motor’s rated current when it is parallel (or half-winding) connected and 1/3 of the motor’s rated current when it is series (or full-winding) connected. That is to say, a 6 Amp / phase motor will require a 4 Amp rated supply when parallel connected and a 2 Amp rated supply when series connected. If multiple motors and drives are used, add the current requirements of each to arrive at the total power supply current rating."


This information specifically applies to Geckos. Other types of drives may or may not follow the above rules.

[plateroomred]

Hello,
Where can I get the components to build a 72v@25 amps power supply from either 120 or 240 ac, to power my three servo's from my 320 gecko's?
Thanks,
Larry
P.S. I believe I have posted this in the wrong area, any help would be greatly appreciated.

[ViperTX]

Hello,
Where can I get the components to build a 72v@25 amps power supply from either 120 or 240 ac, to power my three servo's from my 320 gecko's?
Thanks,
Larry
P.S. I believe I have posted this in the wrong area, any help would be greatly appreciated.

Ebay...look for toroids that have a secondary rating of 50 volts....why 72 VDC....what's the rating of the servo?

[CJL5585]

Don't forget that the output voltage of a DC supply (after being rectified and filtered) will be 1.414 times the transformer output voltage (AC).

A transformer with a 72 Volt AC output will give a DC output of approximately 101.80 Volts DC. A transformer with an output of 50 VAC will have a voltage of 70.7 Volts DC after the rectifiers and filter capacitor(s).

[Don C]

Go to http://www.toroid.com