Im shopping for a 68v power supply and am deliberating the ps806 or sps705. Is it possible to run 4 axis from these? The following website says 1-4 axis while zapp says 1-3 axis, I know they have 3 main outputs but can they be used for 4 axis, i.e using one output for a master and slaved axis, or will I have to buy 2 psu's. Also what are the differences between the 2 as the price difference is quite significant? Thanks

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