Thread: ebay board kits v 542 boards
Have a read through Section 8.2 of this:
http://sound.westhost.com/xfmr2.htm , you are looking at toroidal transformers, doughnut shaped, so you can be 99% certain that parallel operation is safe but it is well worth the time to quote:
The transformer manufacturer's specifications will indicate if parallel operation is permitted. If you are unsure, measure the voltages carefully, and avoid parallel connection if the voltages differ by more than a couple of hundred millivolts. There will always be a difference, and only the manufacturer's winding tolerances can predict what it will be. With toroidal transformers, the windings are often bifilar, meaning that the two windings are wound onto the transformer core simultaneously. The tolerance of such windings is normally very good, and should cause no problems.
This is a must read for anyone playing with mains: http://sound.westhost.com/articles/electrocution.htm
If you're bored then http://sound.westhost.com/xfmr.htm is also worth looking at. In fact bookmark the site for a rainy day, there's lots of info in the Articles part and a lot of good projects too. Rod Elliott, the site owner is knowledgeable and well respected, if you are ever uncertain about anything electrical then it's always worth a visit to see if Rod has any advice.
sorry here is a good detailed page.. http://www.routoutcnc.com/PowerSupply.pdf
Last edited by crossleymarko; 05-04-2012 at 11:20 PM.
ok so i got it, apparently times your ac voltage by 1.4... right gonna go with it i think.. been looking at maplins,?
off the shelf 225va 2x35 3.2a,39.99. not as good as your link to rapid johnathon, i know but what do ya think.
Also check out http://www.airlinktransformers.com/ for transformers.
thanks what range of va am i looking at. ie 300va 0-35 0-35
so would 600va 2x35v cover me for all motor upgrades... dont wanna be spending twice...
why would you use axis a by the way for milling... ?
add vat to the rapid prices,, doh,,! another tenner mate. 49.50 so with caps etc how much do you acctualy save?
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