I have a hay elevator that the motor just went on. I replaced the 1750 RPM motor with a 3400 RPM motor.

I now have an elevator that shoots the bails into the loft. Funny but not really.

The pulley on the original motor was a 3” one and I used that on the new motor so the speed is to fast.

The pulley I go to is a 6” one. So math masters, what size do I need to go to?

I don’t need to cut the speed in half back to the original speed but cutting it down would be nice. So that they are not flying up into the loft at light speed.

I know there is a formula to figure this out but I have no idea what it is. Anyone?

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

I cannot help on the math, but please tell me that you sent a guy up to the loft, and then turned the elevator on.

Video the reaction to being shot at with bales of hay.

Brad

If the original pulleys were 3 motor 6 elevator you need to go 11/2 motor 6 elevator or 3 motor 12 elevator.

[This message has been edited by Fiero STS (edited 01-27-2010).]

No not yet.

Melanie puts the hay on down bottom and I grab them up top. I put the new motor on and just turned it on to see just how fast the thing was.

Lets put it this way the thing is twice as fast as before and maybe to fast. We are headed up to the barn now to try it out at,


Light speed.


Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

No the motor needs a smaller than original. If it had a 3" than you need an 1 1/2" to slow down the elevator. Or you can keep the 3" on the motor amd go to a 12" on the elevator to reudece the speed by 1/2.

quote Originally posted by Fiero STS: No the motor needs a smaller than original. If it had a 3" than you need an 1 1/2" to slow down the elevator. Or you can keep the 3" on the motor amd go to a 12" on the elevator to reudece the speed by 1/2.

Sounds right but I am on my way to find out just how fast this thing is.

Light speed here we come.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

Steve,
Think about this, if you put larger wheels on your truck and still are maintaining the same engine rpm how has that affected your speed going down the road?

You need to do one of two things, either reduce the size of the sprocket on the drive motor or increase the size of the sprocket turning the conveyor.

BTW, is this the same conveyor that plane took off from.

Ron

[This message has been edited by blackrams (edited 01-27-2010).]

STS has the math right, Steve. To keep the same speed you need a 1.5" pulley.

That might be a problem depending on how wide the belt is and how big the shaft is on the motor, but I'd put the smallest pulley I could find on the motor (down to 1.5") that will fit the shaft and belt. You might have to settle for a 2" or something in that range.

John Stricker

quote Originally posted by 84fiero123: Sounds right but I am on my way to find out just how fast this thing is. Light speed here we come. Steve

quote Originally posted by jstricker: You might have to settle for a 2" or something in that range. John Stricker

John,
Just because other folks you know have to settle for 2" doesn't mean Steve has to.

Ron

I was talking about diameter.

John Stricker

quote Originally posted by blackrams: John, Just because other folks you know have to settle for 2" doesn't mean Steve has to. Ron

quote Originally posted by jstricker: I was talking about diameter. John Stricker

So was I.

Ron

[This message has been edited by blackrams (edited 01-27-2010).]

If you can't change the motor puller to a smaller one you need a bigger one on the other side. Try a 12" pulley. If you can't do that, maybe you can have an electrician install a rheostat, to control the motor speed, then you will have a variable speed system.

quote Originally posted by avengador1: If you can't change the motor puller to a smaller one you need a bigger one on the other side. Try a 12" pulley. If you can't do that, maybe you can have an electrician install a rheostat, to control the motor speed, then you will have a variable speed system.

Rheostats only work on DC motors. He'd need a variable frequency drive for an AC motor, and I don't think the cost would be worth it.

quote Originally posted by blackrams: John, Just because other folks you know have to settle for 2" doesn't mean Steve has to. Ron

LOL,

LMFAO

Oh **** now I have even more chest pains than I had when I came in here.

OK

As I crawl off the floor in tears.

Well to quote Scotty.

“Warp speed and climbing,”

And to quote me,
“She can take it but I can’t.”

It is not as bad as I thought it would be. I can’t keep up but I can put a switch up top so I can start and stop it from up top and down bottom.

I should have replaced a half a dozen bearing while I had it down, it gets stored up in the ceiling.

I guess now I have to replace those bearings anyway. With the higher speed it threw a chain in the middle of just 50 bales so I have to.

I know there is a formula to figure out this. Because when I was working multispindle screw machines and had to set it up for something new formula for this I just can’t remember it.

Thanks guys.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

Is anyone else picturing hay flying everywhere. Like being shot out of a cannon. We really need Video here lol.

Brad

quote Originally posted by twofatguys: Is anyone else picturing hay flying everywhere. Like being shot out of a cannon. We really need Video here lol. Brad

I don’t need video, I was there. I saw it in person.

But it wasn’t that bad. Well not quite.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

quote Originally posted by 84fiero123: I don’t need video, I was there. I saw it in person. But it wasn’t that bad. Well not quite. Steve

Yeah, till a bale comes up that elevator at warp speed when you're not expecting it and you turn around to catch it in the chest.

Change the pulleys Steve.

I can see it now, Steve gets lazy and decides to ride the elevator up to the loft instead of climbing the ladder. He gets on, Melanie hits the power switch and there goes Steve, the next man to visit the moon.

Ron

[This message has been edited by blackrams (edited 01-27-2010).]

quote Originally posted by 84fiero123: It is not as bad as I thought it would be. I can’t keep up but I can put a switch up top so I can start and stop it from up top and down bottom. I should have replaced a half a dozen bearing while I had it down, it gets stored up in the ceiling. I guess now I have to replace those bearings anyway. With the higher speed it threw a chain in the middle of just 50 bales so I have to. I know there is a formula to figure out this. Because when I was working multispindle screw machines and had to set it up for something new formula for this I just can’t remember it. Thanks guys. Steve

First off, your reaction of laughing is quite common for Blackrams every time a female sees the size of his equipment, so he certainly felt at ease.

Second, the formula is almost as simple as Blackram's love life.

Figure the circumfrence of each pulley. 3.14 times the diameter. Take the DRIVE and divide it by the DRIVEN and that's the reduction or overdrive ratio. Example in your case:

3*3.14=9.42" 6"*3.14=18.84 9.42/18.84=.500 reduction

If you had a 1750 rpm motor time the .500 reduction your shaft was turning at 875 rpm.
Now you have a 3400 rpm motor but you still want your shaft to be driven at 875 rpm so you need a reduction ration of .257 or 3.9:1

Basically, if you have to keep the 6" pulley, the ideal would now be 1.542" but I'd say you want to really keep your shaft speed below 1,000 rpm so then you need to have a pulley close to 1 3/4". Any bigger and you're going to still be slinging things pretty fast, although I think you'd be fine with a 2" pulley.

John Stricker

Nevermind the math.

Leave it set for "ludicris speed" and video it for us.

Who says farm work can't be humorous

[This message has been edited by htexans1 (edited 01-27-2010).]

quote Originally posted by jstricker: First off, your reaction of laughing is quite common for Blackrams every time a female sees the size of his equipment, so he certainly felt at ease. Second, the formula is almost as simple as Blackram's love life. John Stricker

Oh my, I can't tell you how much I love reading your posts John. You had me on the floor laughing my butt off. Seriously. You should do something with that talent. Don't just let it go to waste, I know, you could become one of President Obama's speech writers. He delivers one heck of a speech, you two would make a good team.

Ron

Sounds like you just need to start searching for old hot tub motors. some are 1700RPM, some are 3400 rpm and some are dual speed. Generally you can find these motors cheap used with someone getting rid of the hot tub because the main control board went.

Change the gears to an even higher ratio !!!!!

why screw around with Patatoe cannons, when ya can have a hay-bale canon !.

DAYMN--see if you can get it to fire 50 yards.

(I tried to build a pumpkin cannon once out of large-diameter sewer pipe...had it almost finished, but my G/F at the time put an end to that plan when I went to go for 5 gallons of gasoline.)

quote Originally posted by htexans1: Nevermind the math. Leave it set for "ludicris speed" and video it for us. Who says farm work can't be humorous

I did consider doing that.

But it takes so long to download video I have to make a CD and send it to someone with high speed.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

Yeah, the ratio given is correct, but depending how much load you are experiencing, a smaller pulley on the motor shaft may result in belt slip, as you won't have as much contact with the pulley. If you had room, instead of the variable frequency route, you can go with a jack shaft in the middle of the drive, thus doing your pulley size change there. A lot cheaper than messing with the electrical end of things.

Another option, if you have a spare one laying around, is to put a reducing gear box between the motor and the driven end of things. Not cheap tho, if you have to go out and buy one, tho I am guessing a 2:1 box would run a couple hundred bucks depending how much HP you need.

quote Rheostats only work on DC motors. He'd need a variable frequency drive for an AC motor

I never claimed I was an electrician that is why I suggested he ask an electrician about this. Changing the pulleys would probably be the easiest and cheapest solution.

quote Originally posted by maryjane: Yeah, the ratio given is correct, but depending how much load you are experiencing, a smaller pulley on the motor shaft may result in belt slip, as you won't have as much contact with the pulley. If you had room, instead of the variable frequency route, you can go with a jack shaft in the middle of the drive, thus doing your pulley size change there. A lot cheaper than messing with the electrical end of things. Another option, if you have a spare one laying around, is to put a reducing gear box between the motor and the driven end of things. Not cheap tho, if you have to go out and buy one, tho I am guessing a 2:1 box would run a couple hundred bucks depending how much HP you need.

Best answer yet.Two pulley Jack shaft is easiestand least expensive.

Don't take advise from this Fox News reporter no matter what you do.
http://probablybadnews.com/...than-rollercoasters/

Some of you guys have never seen a hay elevator have you?

Note the motor is on the right and the jackshaft is on the left.

http://www.palaciosmanorhay...elevator%5B86%5D.JPG

It already has a jack shaft type setup . It is the only way a half hp motor can move 50 lb bales of hay up an incline a dozen at a time.

Mine has the side with the motor then a shaft that goes to the other side where there is a gear reduction setup.

John thanks, I knew you would know.

Thanks guys and now I am considering making that
.
.
.
.
.

Hay Cannon.
Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

quote Originally posted by 84fiero123: John thanks, I knew you would know. Steve

John????? John!!!!!!!!!!!!!!!!!!!!!!

OK, that's the last time I try to walk you through an explanation.

Ron

quote Originally posted by 84fiero123: Some of you guys have never seen a hay elevator have you? Note the motor is on the right and the jackshaft is on the left. http://www.palaciosmanorhay...elevator%5B86%5D.JPG It already has a jack shaft type setup . It is the only way a half hp motor can move 50 lb bales of hay up an incline a dozen at a time. Mine has the side with the motor then a shaft that goes to the other side where there is a gear reduction setup. John thanks, I knew you would know. Thanks guys and now I am considering making that . . . . . Hay Cannon. Steve

I've seen them--just haven't seen yours, and I have one. Direct driven off the 540 rpm pto of my tractor.
Is the final drive (bottom of the pic) being driven by a belt and pulley setup on the far left of the one you linked to--or chain and sprocket?
A guy up the road I helped haul hay for has one driven with a washing machine motor. Dunno what rpm or hp.

[This message has been edited by maryjane (edited 01-28-2010).]

quote Originally posted by blackrams: John????? John!!!!!!!!!!!!!!!!!!!!!! OK, that's the last time I try to walk you through an explanation. Ron

The formula is what I was asking for,

I do appreciate all the answers.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.

quote Originally posted by 84fiero123: The formula is what I was asking for, I do appreciate all the answers. Steve

Just pulling your chain, so to speak, Pun intended.

Ron

quote Originally posted by blackrams: Just pulling your chain, so to speak, Pun intended. Ron

OK

http://rlv.zcache.com/pull_...67268018qjfk_400.jpg

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Technology is great when it works,
and one big pain in the ass when it doesn't.
Detroit iron rules all the rest are just toys.