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speed control

 

i've followed the thread about changing motors
why do we not see reeves drives with a standard ac motor
i think they're used on some wood lathes and larger mills
i used to work on them for driving positive displacement pumps
they're non-electronic and very simple
 

I have one on my Shopsmith Mark V. It works well and provides enormous torque sown low. But I've relubed it on occasion and I definitely wouldn't call it "simple." The CONCEPT is simple, but changing the diameter of s rotating pully requires many parts.?

Mike Taglieri?

On Sat, May 25, 2024, 4:19 PM fxkl47BF via <fxkl47BF=[email protected]> wrote:
i've followed the thread about changing motors
why do we not see reeves drives with a standard ac motor
i think they're used on some wood lathes and larger mills
i used to work on them for driving positive displacement pumps
they're non-electronic and very simple
 

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Several of the larger metal manufacturers used Reeve's drives , Logan , South Bend I believe Clausing to name a few .

animal

On 5/25/24 2:16 PM, Miket_NYC wrote:

I have one on my Shopsmith Mark V. It works well and provides enormous torque sown low. But I've relubed it on occasion and I definitely wouldn't call it "simple." The CONCEPT is simple, but changing the diameter of s rotating pully requires many parts.?

Mike Taglieri?

On Sat, May 25, 2024, 4:19 PM fxkl47BF via <fxkl47BF=[email protected]> wrote:
i've followed the thread about changing motors
why do we not see reeves drives with a standard ac motor
i think they're used on some wood lathes and larger mills
i used to work on them for driving positive displacement pumps
they're non-electronic and very simple
 

They're rough on their belts; before solid state drives became affordable, they were about the only reasonable way to make a variable speed drive. With modern electronics they're no longer a good option.

Roy
 

I have an 11" Logan with a Reeves drive. It is an effective mechanical solution.

I can see why electrical solutions have replaced them. It is quite noisy for one, it also takes up a fair bit of space.

3 phase w/ VFD or a brushless motor is just a better solution, more compact, quieter, less maintenance, probably more accurate speed control and I'm guessing also cheaper.

If the Reeves drive ever fails on mine, I'd most likely just replace it with a 3 phase motor and VFD.
 


"If the Reeves drive ever fails on mine, I'd most likely just replace it with a 3 phase motor and VFD."

That's apparently what Shopsmith has done for their newest machines, primarily to get a larger speed range. I've been into my Shopsmith's Reeves drive a couple?of times for cleaning and lubing, and the main failure point is the belt, which you can replace (though it's not an easy job).

A weak point of the Shopmith is that many of the parts inside are made of aluminum or zinc alloys. That was because to use a Shopsmith in drill-press mode you have to lift the bed and headstock vertically, so they tried to keep the headstock as light as possible.? Logan didn't have that problem, so presumably everything inside is steel or cast iron.

Mike Taglieri?


On Sun, May 26, 2024, 10:06 AM Aaron Woods via <awoods550=[email protected]> wrote:
I have an 11" Logan with a Reeves drive. It is an effective mechanical solution.

I can see why electrical solutions have replaced them. It is quite noisy for one, it also takes up a fair bit of space.

3 phase w/ VFD or a brushless motor is just a better solution, more compact, quieter, less maintenance, probably more accurate speed control and I'm guessing also cheaper.

If the Reeves drive ever fails on mine, I'd most likely just replace it with a 3 phase motor and VFD.

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