"Lloyd E. Sponenburgh" wrote:

FINALLY, I got my r2e4 Bridgeport converted to single-phase.

No more of that damned RPC singing over in the corner, no.

As it turns out, the R2E4 machine is basically a single-phase machine,
anyway, except for the spindle motor (which is definitely 3-phase).

The electronics all run off two (single) phases of the incoming power,
and there are no references to the phases. All it took to get them
converted was to move a couple of leads.

To adapt the spindle, I installed a VFD and a relay isolator that would
track the F/R signals from the motor relays, and signal the VFD to
start/stop/forward/reverse.

It cost only $149 and some labor.

Now to make metal in the QUIET! G

LLoyd

The thing to keep in mind with any of these machines, is that outside of
motors, not much of anything really uses three phase power. VFDs are
pretty cheap these days so the motors are easy to deal with, even stuff
like coolant pump motors can go on small basic VFDs. Occasionally you
have to rebuild a 3 phase AC to DC power supply, but often you just find
several separate power supplies with single phase inputs.