14 years ago
Just got off the phone with Fadal.
Turns out that if running a 3016L off a rotary converter, there is no easy
way to separate the electronic stuff from motor stuff, ie, no easy way to
put the electronic stuff on 220/240 single phase, and have the wild leg just
go to motors. This is because, from the schematic, all three legs go all
over the place.
The transformer is a 3 ph transformer. T-820.
There are *un*easy ways, however.
One is, just leave the machine underpowered, ie, set the jumps for the wild
leg voltage, with the other two phases thusly underpowered. It seems that
one of my symptoms, machine shutdown on 3-axis 100% rapids, is explained by
So yeah, both easy and uneasy.
Another possibility is to perhaps set ONE of the jumps to accommodate the
wild leg, ie, not all three jumps the same. The tech hem-hawed at this.
Any idears on this? This would be great, if do-able.
Another he said is to take the three legs going to an amplifier, and the
three legs going to the spindle inverter, disconnect the "wild leg output",
and just jumper over one of the other legs to the amplifiers/inverter, as
they just need three hots, apparently, not necessarily three different
Sounds a little weird to me. I can see it more for the amplifers, if they
are just 110 V, but the inverter seems a little less straightforward, if
it's 3 wire 220.
Another is to get separate transformers. The tech said people have done
this, but fadal has no schematics on how this is done, as they don't support
I'd like to know how this is done.
Another is to get the T-812 transformer, for single phase input. About
$1200, but also available on Ebay, he said, altho it's not on ebay as of
Inyone got a T-812 sitting on a shelf??
Another is to find some goddamm way of toning down the wild leg. Possible
with the voltage stabilizers I mentioned in Ping Clay ("buck boost"
transformers). Tech said these were OK, but not the greatest either. I'd
like to know how these work.
I think I'm going to email fadal regarding "fine-tuned" jumper settings, see
what they say.