DC motor, power supply question

[Shawn]

I bought a 1HP 24VDC motor this morning on a whim because it was $40.00 and lightly used. I though I could use it on my Horizontal Benchmaster mill (which I'm planning to convert to a CNC multi machine, lathe/mill, that's another post though  )

The data plate shows the motor as 24VDC 39 amps which as far as I can tell is almost a 1000 watts. I thought a power supply and speed controller would be easy to find and relatively cheap but that doesn't seem to be the case. I don't need the full 1HP as the original motor on the Benchmaster was 1/2HP, can I get away with say a 24VDC 600amp power supply? if so, what would the peak HP be at that rating?



I have been pretty busy with work but I'm already looking forward to getting back into my shop this Fall, to many projects left hanging with this early hot/dry summer 

[dallen]

not to derail your motor thread but hows that hunk of bronze working out in your shaper?

[Shawn]

Hi Dallen, I thought I posted a video of the shaper running with the new brass block in place? It's running great and the brass you sent is holding up really well. I just discovered the other day that the weird witness marks the tool was leaving on the return stroke was related to the crappy machine vise I was using. I put the heavy duty vice (I was hoping to send you till I found out the shipping was going to be near $400) on the Shaper and its cutting smooth and very quiet. 

[dallen]

good, a shaper will leave a mirror finish if set up right,

was just wondering hadn't seen you around for a while.

[Vinny]

Quote:The data plate shows the motor as 24VDC 39 amps which as far as I can tell is almost a 1000 watts. I thought a power supply and speed controller would be easy to find and relatively cheap but that doesn't seem to be the case. I don't need the full 1HP as the original motor on the Benchmaster was 1/2HP, can I get away with say a 24VDC 600amp power supply? if so, what would the peak HP be at that rating?

If you have a 24V 600A power supply you don't need to worry about a half a horse! I'm assuming (dangerous, I know) that you were thinking 600 watts, not amps.

DealExtreme.com has a lot of power supplies and you can probably find a 24V 40A supply there pretty cheap. I just received a 12V 20A supply for my induction heater today, it cost me about $30 with free shipping. Also got some stepper drivers pretty cheap. Still waiting on the speed control for the mini-lathe (also cheap), should be here any day. It shipped a day or so later.

As to running it on half current, I'm not too sure that would work out so well. Seems the startup inrush would exceed the 20A rating.

[Shawn]

Thanks Vinny, i did mean 600 watt not amps : ) I'll check out the website, thanks for the heads up.

[Shawn]

The answer was so obvious I was blind to it. I'm going to use two 12VDC batteries hooked up in series and then just separate them to charge them up with a car battery charger. Doh