electrical question

Burchtree

Burchtree

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I could have posted this in a previous thread, but I figured you all wouldn't look at it. So new thread it be.

Got a compatibility question. I'm electronically inept, and I want to make sure these will work together.

http://www.surpluscenter.com/item.asp?UID=2005020814504544&catname=electric&item=11-2434

http://www.surpluscenter.com/item.asp?UID=2005020814504544&catname=electric&item=10-1573

There was a larger motor, but the amps were too large for the controller (and they didn't seem to have one that large.)

BTW -- I'm going off Dan's "Shoestring Budget" info.
 
The controller puts out 10 amps, adjustable VDC. The motor requires 1.4 amps at no load, 110 VDC. It looks good to me, but make sure you don't overvolt the motor with that controller. That'll shorten the motor life real quick.
 
How would I go about overloading it with the controller? I talked to another fellow and the said the 14 maximum was what it could take and wouldn't blow the motor. Is there a better motor/controller set-up from them? (in keeping with the shoestring budget idea)

Also, for you pulley guys, will this http://www.surpluscenter.com/item.asp?UID=2005020814504544&catname=electric&item=1-1625-C work with the motor and KMG. As I'm going variable speed, is the pulley size that big of a deal?

Thanks in advance -- :D
 
Call Surplus Center and find out what the "full load current" is for the motor. If it is greater than 10 Amps, the controller will probably trip out or blow a fuse when you load the motor and you won't be able to get full rated power out of it.

Also, find out if they sell some kind of box or cover that you can install the controller in. There are lethal voltages present on the circuit board. The metal dust from your grinder can accumulate on the board and cause it to short out. This can be quite dramatic. It probably won't be economic to try to fix your controller afterwards. You should put a bunch of small (1/4 inch dia) ventilation holes in the box to let the heat given off by the heatsink escape and to let fresh air in.

Get their 10k pot. You will need that to control the speed of the motor. Also, get the power cord unless you already have one that can be used. The "wiring" tab shows very clearly how to connect it all up.

Most importantly, get someone who actually knows which wire in the power cord is hot and which one is the neutral to help to actually wire it up if you are really inexperienced with electrical stuff. A wrong connection can cause significant damage to your controller and motor or YOU.

Good luck.

Phil
 
Yup, I'm getting the 10k pot and their steel box to cover it all up. At 1.4 amps, and up to 80-percent at full load, there technically shouldn't be any way to overload the motor with it.
 
Micheal

Our posts crossed.

Check if the motor is OK with 130V. It might take it. If not, set the maximum output voltage by monitoring the output of the controller with a meter but without the motor connected. The controller should have instructions on how to do this.

The sizes of the pulley on your motor and your grinder, the size of the drive wheel on your grinder and your motor speed (5100 rpm) will, together, determine the belt speed range that you will get. You don't want it running so fast that the usefull range of the belt speed is all in the bottom 10% of the available range from the controller. Unfortunately, you will have to do some math to figure this out.

Phil
 
Micheal

We cross again.

The 1.4 Amp figure is the amount of current that the motor draws with rated voltage (110V) and no load applied (zero hp). You need to find out from Surplus Center how much it will draw at full load (1 hp). That figure should be much more than 1.4 Amps.

Phil
 
Burchtree said:
How would I go about overloading it with the controller? I talked to another fellow and the said the 14 maximum was what it could take and wouldn't blow the motor. Is there a better motor/controller set-up from them? (in keeping with the shoestring budget idea)
Click to expand...
The controller is capable of putting out 130 volts, and the motor is designed for 110. If you feed the motor more voltage than it can take (overvolting), it will run faster and wear out faster.

Pso has the right idea though, to call the manufacturer. Sometimes motors are capable of taking more voltage (watch this: http://www.g4techtv.com/flashpop.aspx?video_key=8874 :D). But there is no way to be sure without contacting the manufacturer.

If you want to play it safe on the voltage, find out where 110 volts is on the dial, and don't go above that. Contacting the manufacturer for the amps-on-load would be good too.
 
S2nd

That video was great. I used to do that with my battery powered toys like tanks and cars.

The motor has a nominal rating of 110V. The detailed specifications may show a wider range. 130V is not a big percentage over 110V so as long as the motor can take it, it should not cause a lot of extra wear and tear.

One would probably set the min pot to give the minimum motor speed desired, then set the max pot to give the max motor speed desired. The 10k pot would then vary the motor speed between the minimum and the maximum set by the two pots on the controller board. There should not be any need to "stay below a certain setting" on the 10k pot.

Phil
 
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