New member lots to learn

[m.marino]

Okay, Power supplies the other pain in the backside.

If you go with a switching PSU as you have in the link then you need to have between 150 to 200% of the required current for the motors available. This gets expensive rather fast and is one of the areas folks cut corners often and wonder why they have issues. On the other hand IF you go with a Toroidal transformer you can get away with as little 50% of the required current available (microstepping makes this an even more real option as the amount of current on demand rarely ever reaches full capacity). The other advantage of most unregulated Toroidal transformers is they handle back EMF much better then their switching PSU counter parts (which is one of the reasons for the increased current requirements).

60V will do just fine and you could get away with 48V with a huge loss in available torque. Which would bring the costs down on your PSU. If you go with 60V as your PSU it won't cause any issues as long as you are not pushing it extremely hard and just adding some passive cooling will help deal with the minor heat issue that might develop. I am no an EE and have built my own PSU's and more then a passing background in electrical equipment due to being in amateur radio (Full permit). So I would strongly suggest taking the time to sit down and read and learn a good bit before buying your PSU or building it.

Michael