ngawagwa: Jazz offers some good advice but you still have the problem that down-time is costing you money. From what I read you're still in the "misbehaving" stage and trying to get going? The original Denford electronics were, I understand 24VAC (and only 100VA for the drivers), but you say that somewhere along the line someone has replaced a bunch of stuff with a Mach3 conversion - including a separate 24VDC PSU. It's possible that they've pushed this straight onto the existing Denford card (it is likely to just rectify/smooth this straight onto the drivers and this would work with DC).

I offer the following cautiously, because it's a poor half-way house. If you need to try to get going quickly and don't mind a bit of down time to re-wire, then your original idea of slaving the DIV-268 onto the X-Axis could be sensible - and I can gift you a 200VA/36V SMPS. Yes, it's entirely the wrong PSU, but for a single axis (to test that the concept is right and you that have nothing else going wrong) it could get you going for the very short term. I can even drop you a couple more DIV-268s if they're handy for you (they are not great, but at 36V will out-perform the Denford drivers). That would just be to solidify you're own view as to what your shopping list needs to be and possibly get you back cutting tomorrow (if you don't remember my name - if you recall the vacuum bed? - I'm local). The PSU did, once upon a time, control a Denford star mill.

It's absolutely not an end-solution - I'd agree with the previous sentiments that you need to throw 300-500VA at around 50V at this with a toroid. Your final choice of drivers may allow you a simple direct connection to a transformer (if they support AC supply) and a modern digital driver will outperform the old shite analogues (and I include the DIV-268s amongst those). And you'd need to weigh up the down-time of slaving an axis onto a separate PSU and driver (an hour?) against your productivity. But the offers there.