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Author Topic: The SMOT (PM3.2)  (Read 19796 times)

CLaNZeR

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The SMOT (PM3.2)
« on: November 24, 2007, 02:24:29 PM »
Low-Q came up with the following link to the The SMOT (PM3.2).
http://www.geocities.com/k_pullo/SMOT15_PM3-3.htm

Looks simple enough, so what the heck, lets give it a go.

I want to use some of the magnets I already have as to keep buying new ones for each project gets expensive.
So decided for the Rotor magnets to use some of my good old dedicated 19mmSQ * 3mm Neo's

I have layed up the design and gone for a 120mm Rotor that fits 16 of these magnets around the outside nicely and because they are thin I only did a 6 degree slant, might have to increase this, but for now it is a building block.

(http://www.overunity.org.uk/SMOT15_setup.GIF)

(http://www.overunity.org.uk/un.jpg)

(http://www.overunity.org.uk/un1.jpg)

(http://www.overunity.org.uk/un2.jpg)

(http://www.overunity.org.uk/un3.jpg)

As you can see gone for a small brass shaft that will pop in some small bearings to reduce the friction.

Off to knock the base up and will update later.

Cheers

Sean.

hanglow

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Re: The SMOT (PM3.2)
« Reply #1 on: November 24, 2007, 04:11:20 PM »
What kind of tool did you use to make those slots in the plexi glass?

Paul-R

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Re: The SMOT (PM3.2)
« Reply #2 on: November 24, 2007, 04:18:57 PM »
This device is symmetrical and reminiscent of the tomi track
http://mmmgroup.altervista.org/e-magnet.html
The forces should balance out.

tinu

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Re: The SMOT (PM3.2)
« Reply #3 on: November 24, 2007, 04:51:52 PM »
Low-Q came up with the following link to the The SMOT (PM3.2).
http://www.geocities.com/k_pullo/SMOT15_PM3-3.htm

...

"Sorry, this GeoCities site is currently unavailable."

shruggedatlas

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Re: The SMOT (PM3.2)
« Reply #4 on: November 24, 2007, 05:10:37 PM »
One funny bit from the geocities website, right below the video link:

"Unfortunately this prototype seems not to work."

acp

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Re: The SMOT (PM3.2)
« Reply #5 on: November 24, 2007, 05:19:28 PM »
Although the overall torque from the website in question does seem to be mostly positive, those values shown in the graph in comparison to the torque generated by any two magnets( rotor and stator) is miniscule, so the positive result in this case is probably just the result of noise or inaccuracy of floating point calculations. Any curve that looks as jagged and rough as that one is suspect.   

CLaNZeR

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Re: The SMOT (PM3.2)
« Reply #6 on: November 24, 2007, 05:23:16 PM »
Well the base is done and Rotor mounted on minature bearings

(http://www.overunity.org.uk/un4.jpg)

(http://www.overunity.org.uk/un5.jpg)

Lttle video to show how loose the bearings are.

http://www.overunity.org.uk/CLaNZeRS-Smot-PM-attempt.wmv

Now to start the Stator mounts.

CLaNZeR

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Re: The SMOT (PM3.2)
« Reply #7 on: November 24, 2007, 05:25:14 PM »
What kind of tool did you use to make those slots in the plexi glass?

Hi Hanglow

They were cut with a 3mm 2flute slot drill on a small CNC machine.

Cheers

Sean.

CLaNZeR

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Re: The SMOT (PM3.2)
« Reply #8 on: November 24, 2007, 05:25:59 PM »
This device is symmetrical and reminiscent of the tomi track
http://mmmgroup.altervista.org/e-magnet.html
The forces should balance out.

thx Paul

Interesting linkl, will go have a read

CLaNZeR

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Re: The SMOT (PM3.2)
« Reply #9 on: November 24, 2007, 05:28:02 PM »
Although the overall torque from the website in question does seem to be mostly positive, those values shown in the graph in comparison to the torque generated by any two magnets( rotor and stator) is miniscule, so the positive result in this case is probably just the result of noise or inaccuracy of floating point calculations. Any curve that looks as jagged and rough as that one is suspect.   

Well only one way to find out  ;D

Be handy having a loose rotor to try a few other things as well, so not all is lost yet !


helmut

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Re: The SMOT (PM3.2)
« Reply #10 on: November 24, 2007, 06:09:51 PM »
Although the overall torque from the website in question does seem to be mostly positive, those values shown in the graph in comparison to the torque generated by any two magnets( rotor and stator) is miniscule, so the positive result in this case is probably just the result of noise or inaccuracy of floating point calculations. Any curve that looks as jagged and rough as that one is suspect.   

Well only one way to find out  ;D

Be handy having a loose rotor to try a few other things as well, so not all is lost yet !



I which you good Luck.
helmut

hanglow

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Re: The SMOT (PM3.2)
« Reply #11 on: November 24, 2007, 07:04:34 PM »
Try not to laugh to hard. I am new at this. I'm not real good at this but at least i'm slow. :) I don't have a fancey CNC machine yet. So I am using hand tools that are sometimes really hard to get accurate results. I originally was going to put 16 cube magnets in but after I got done shaving my oval in to a circle thanks to a rotor zip tool, it was to small to fit 16 so I said what the hell I'll just try 8 and I will have to make a new one that holds 16. Instead of using magnets on the outside stator I used pieces of steel that I found at the hardwood store. This motor didn't work but at least you can see what not to try.

hanglow

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Re: The SMOT (PM3.2)
« Reply #12 on: November 24, 2007, 07:05:39 PM »
here is another video file.

hanglow

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Re: The SMOT (PM3.2)
« Reply #13 on: November 24, 2007, 07:06:47 PM »
Here is a picture

CLaNZeR

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Re: The SMOT (PM3.2)
« Reply #14 on: November 24, 2007, 08:14:53 PM »
Hanglow, I do not think you need a CNC machine mate.

Bloody good job, well done.

Be interesting to swap the metal plates for magnets.

Cheers

Sean.