MIcro Mill CNC Power Supply
I had intended that this power supply be used on the XYZR table.  There's nothing wrong with it, but it puts out 35 volts, and is not needed for that particular design.  So I'll use it to CNC the micromill instead.  It'll work just fine now that the HobbyCNC board is back and running.  I had (and have) unipolar motors that I've been using as bipolar motors.  I'll use the HobbyCNC board, the existing assembly I've made for it, and this power supply.  All I'll have to do is to wire (rewire, actually) the motors, add the right connectors, and put the home and limit switches on the mill, and I'll have a working CNC mill... it says so right here.
First shot is of the front.  I haven't labeled anything yet.  The two little neon lights over the fuses will light when the fuse is blown.  The green button applies the 35 volts, the red button stops it.  I'll agree that there are a lot of screw heads on the panel (rack), but that's just the way the thing came.  The panel was pre drilled for a number of things, and much of the design was somewhat dictated by the placement of existing holes.
Back view.  The AC control circuitry is on the left, the power transformer (24 volts @ 8 amps) is in the middle, and the two power supply filter caps (42,000 ufd at 50 volts) are on the right.
AC wiring, all nicely cabled.  The wires are stiff enough that they won't move much.  I probably should put a plastic shield over this, but for now, you can't get to anything very easily.  It'll be mounted in a rack enclosure anyway.
The bridge rectifier is rated at 200 PIV and 35 amps.  I think it's going to be just fine.  The weather was nice, as well, as you can see from the out of focus background.
AC wiring detail.  THe little transformer is a 12 volt transformer used to light the red push button when the green one (powered from the transformer CT.) is off.  Nothing but the best here.  I do need that shield, I suppose.  The transformer is rated at dual secondaries, 12 volts at 8 amps each, primary 120/240 vac.  The contactor is rated at 10 amps and is in the primary of the transformer.
That's pretty much it for the supply.  It produces about 35 volts under no load conditions, and I will be putting a load resistor on it to keep the supply capacitors from retaining a charge when the system is off.  The transformer is one that I had laying about for a long while.  Blue is AC Hot, Yellow is Secondary voltage or 24 V DC, white is AC neutral.
Next item will be the HobbyCNC driver board and the relay driver board.  (here)