power supply/ motor/ driver combo?

[freddean2006]

Hello,

Im thinking of combining a hobbycnc 4axis driver

and the following stepper motor

http://cgi.ebay.co.uk/ws/eBayISAPI.d...5862&rd=1&rd=1

with this power supply (36v 9a+)

http://cgi.ebay.co.uk/350W-36V-9-7A-...QQcmdZViewItem

Does anyone know if its compatible? Is 9amps too much?


Thanks

[la_coterie]

the motors will only draw what curent they want, think about the national grid how many amps is that? but your light bulb only uses what it needs

voltage will work but 20 times rated stepper voltage would be better, but then I don't know the board, perhgaps that is only rated to 40volts...

[freddean2006]

The board maxes out at 42volts.

So if I were to run a 2 X axis, y and z would I need to add the ampage of the motors together to calculate which supply I would need.

The motors run unipolar at 2.8v 2.8amps. Would that mean if x,y and z were running I would need at least 11.2amp power supply? 4 motors at 2.8amp?

[la_coterie]

Well yes that's how it adds up but... and there's always a but you're never likely to have all 4 motors going at once flat out demanding all that current so in short then that power supply will be fine. There would be no harm in using a bigger amperage power supply if you found one...

motors draw more current the harder they have to work