I 'rebuilt' a smaller lathe and mill, new steppers, drivers etc, but I
wanted to keep the knobs/switches on the
enclosure working like they used to. So I just ended up doing everything
with DC. I only found out there are drivers that actually use DC (after
I upgraded one of them), else I probably wouldn't even have kown.
Ron
On 6/8/20 8:15 PM, Chris Albertson wrote:
I just re-discovered Antek. They make toroidal transformers for CNC and
high-end audio. They also make unregulated DC power supplies using these
transformers.
If you need 5.6 amps at about 80 volts DC one of these will work
https://www.antekinc.com/ps-5n84-500w-84v-power-supply/ Note that it is
rated for continuous 5.9 amps even with 50 Hz mains. This DC
supply costs about $120 but for about $60 you could buy an AC
transformer with the same power rating.
(I've just answered my own question)
I used to use this company's products when I was into tube-based audio. It
is a US based company and they are easy to deal with. They also make much
larger power supplies. It took me a while to "change gears" from audio to
machine tools but both need big DC power.
On Mon, Jun 8, 2020 at 1:44 PM R C <cjv...@gmail.com> wrote:
I have one that does both, for a larger stepper motor.
It can take a bit of effort to find a DC PSU that can actually provide
5.5A the motor can 'pull', it's a lot easier
to get a transformer for one (my driver is 48VAC-80VAC OR 24VDC-110VDC)
Jus a transformer will provide the amps your 'pulling' and of course
without any measures, spikes etc can happen. A switching
power supply has bit of protection there. I think the driver probably
has some simple rectifier in it, I would expect much there.
On 6/8/20 2:05 PM, Chris Albertson wrote:
Some of the larger size Stepper motor drivers will use AC input power.
I
assume all that is needed is a transformer that is rated for the required
current (and a fuse.)
Most people are using these Meanwell-style switching power supplies but
it
seems AC power might be better
Questions
Is there is the best type of transformer? Is there a good supplier?
What about back EMF? Not knowing how the driver works I wonder what
happens when the motor is breaking. Can there be an overvoltage problem?
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