Power Supply Question

Thanks for all the help. One last group of questions based on a
couple of suggestions from Tim Goldstein. I've tried to lay the
variables out clearly so it's a little long:

To bring you up to speed:
I have tentatively identifies my 8 connection unmarked NEMA 42
stepper motors which are directly connected to my Bridgeport Milling
machines X,Y and Z axis as the following:

2.1 volts, 9 amps (based on a photo of a nameplate of a similar motor
and my winding resistance being within 25% - .29 ohm measured to .23
ohm calculated based on nameplate in photo values)

max voltage at 25 times rated voltage would be 52.5 volts DC

I have two power supplies from the original NC controller, each with
a transformer about half the size of a shoebox (an informal, but
descriptive specification for both of them) and capacitors the size
of beer cans.

Each transformer has 105, 115 and 125 volt taps on the primary
(currently at
115v)

Each transformer has a double wound secondary

The first transformer has its two 12 volt secondaries wired through
individual rectifiers and capacitors and then in parallel on the D.C.
side for an output of 16.7 volts DC

The second has two 44 volt secondary windings (with 22 volt center
taps) wired in series for a final power supply output of 130 volts DC

Now to the questions:

1)
Which of the following power supply setups makes most sense (the
apparent best voltage has both secondary windings in series - how
does this affect its ability to handle three NEMA 42 steppers):

Using the 125 volt primary and 44 volt secondary would give:
115/125 * 44 * 1.414 = 57 volts (10% too high based on 25 times rated
volts)


Using a 105 volt primary tap and a 22 volt secondary tap on the same
transformer would give: 115/105 * 22 * 1.414 = 34 volts

OR

Using the 105 volt primary tap on the other transformer with the two
12 volt secondary windings in parallel: 115/105 * (12+12) * 1.414 =
37 volts

2)
Since I'm changing the voltage in the power supply from either 16.5
volts or 130 volts (depending which supply I use to about 35 volts,
can I continue to use the same capacitors? (and same size bridging
resistors)?

Thanks much for all of the assistance.

Jeff