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Old 05-25-2009, 10:33 PM #1
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Default Spirograph. help please :P

first I need the motors.

I've found other options but now I think I'm gonna stuck with this ones (wich one to choose?):

http://www.pagermotors.com/Products....category=Pager

what pot should I use? 1k?(SOLVED)

Also, the laser must aim at the mirror center or on the sides?(SOLVED)

What kind of glue can I use? Cyanocrilate? (SOLVED)

And the last one: Should I glue them in somespecial degree or glueing them randomly will be enough?(SOLVED)

---------------------------------------------------------------------
New ones :P

1.-Where to get the mirrors (SOLVED)

2.-Where to get a box (spain, no radio shack here)

3.-Those motors, I've read they can work at 5V, so maybe using 3V to get clearer patterns is not a bad idea? (SOLVED)

4.-How would the configuration for 3 motors with 3 pots and 3 commutators be? This one for example?(SOLVED)



Thanks in advance.

Yours,
Albert



Last edited by Hallucynogenyc; 05-28-2009 at 07:04 PM.
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Old 05-25-2009, 11:38 PM #2
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Hi Hallucynogenyc,

If you're looking for small motors I would recommend breaking into any old mobile phones or pagers.

However you found these, I have to say the last one looks promising as it does have a variable vibrate, errr, I mean motor speed conrol. I'd go for that one. I'm sure the girlfriend will love your project!!! (although the second link has more reviews!!!) Get three. Even if you only end up using two for the project, you will have a spare!

Yes, removing the metal weight will give you a, "normal", motor, although it will not be, "well adjusted"! The speed will increase remarkably and you may well have to modify the circuit. The same can be said for the aforementioned mobile phone and pager motors. Be careful not to bend the spindle when removing the weights.

(I can't begin to think how you ended up finding those in a search for Spirograph motors!!! Surely this will end up as LASER-****! No good can come of this! lol)

M
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Old 05-26-2009, 06:36 AM #3
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Quote:
Originally Posted by Morgan View Post
Hi Hallucynogenyc,

If you're looking for small motors I would recommend breaking into any old mobile phones or pagers.

However you found these, I have to say the last one looks promising as it does have a variable vibrate, errr, I mean motor speed conrol. I'd go for that one. I'm sure the girlfriend will love your project!!! (although the second link has more reviews!!!) Get three. Even if you only end up using two for the project, you will have a spare!

Yes, removing the metal weight will give you a, "normal", motor, although it will not be, "well adjusted"! The speed will increase remarkably and you may well have to modify the circuit. The same can be said for the aforementioned mobile phone and pager motors. Be careful not to bend the spindle when removing the weights.

(I can't begin to think how you ended up finding those in a search for Spirograph motors!!! Surely this will end up as LASER-****! No good can come of this! lol)

M
hhahahaha. Ye well, I planned to buy 4 and asking my gf before disambling all of them xD Joke.

I ended with this because i was just thinking "what item sold in DX have motors..." and I thought "gamepads have vibrators" and just after this "vibrators lol"

What do you mean "not well adjusted" it's just a pot in series with the motor no?

Yours,
Albert
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Old 05-26-2009, 08:32 AM #4
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Quote:
first I need the motors.
From that web site these are the motors to use, they come with really useful mounting clips.
http://www.pagermotors.com/index_fil...NW/7mm(NW).htm
Quote:
what pot should I use?
100ohm works well with these motors
Quote:
aim at the mirror center or on the sides?
Aim off centre, the nearer the centre the less the effect.
Quote:
What kind of glue can I use? Cyanocrilate?
Once you have drilled the back of the mirror (if you are using plastic mirror) lay it face down on a flat surface, put a drip of super glue over the hole and push the motor shaft in, leave it to dry this way up then you wont stick the motor shaft to the motor body.
Quote:
Should I glue them in somespecial degree
Try to get them straight, that will make the wobble about right

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Old 05-26-2009, 11:58 AM #5
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Good. where to get mirrors now? I heard about using acetone on acrylic ones to get FS, but it doesn't seem so good.

Also, do the rotation direction affect the effect? I would build some commutators then :P

How to power all this btw, 1 NimH is enough?

Yours,
Albert
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Old 05-26-2009, 09:03 PM #6
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Quote "What do you mean "not well adjusted" it's just a pot in series with the motor no?"

Sorry, I didn't check to see where you lived. It had two meanings but the language barrier got in the way. 1st the serious answer: The speed of the motor increases when you remove the weight, so I don't know if this will effect the way the speed control will work. 2nd the not so serious answer: Well adjusted. Able to cope with life. Wise! Coming from a toy like that into a laser project could have some disturbing effects! Waht are you going to call your project? I suggest RAMPANT LASER SPIRO!!! hehe!

Motor direction does matter but it's a 50/50 choice so if it looks wrong, change one round. Not too much to experiment with there.

I have built a tiny spiro using 1 x LM317 driver running two mini-mobile phone motors, (similar to the ones Rog suggested), from 1 x 3.7V battery. However, I was not able to fit any speed control pots into my housing at the time. I was also able to drive a low power diode in an Aixiz module with RCKSTR driver from the same battery.

I think Rog had a really neat solution for running motors as part of the LM317 in one of his lighter Spiros but I'll let him explain that one! Rog?

M
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Old 05-26-2009, 10:04 PM #7
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rog?!?!?!? xD
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Old 05-26-2009, 10:52 PM #8
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Yeah, Rog! Rog8811. Post #5. Bit of legend around here for cool impossible builds and spiros, (puts spiros in fliptop lighters, 7 colour hand-held spiros and the like. I don't know where they are posted on LPF after the move but I'm sure you'll find them on Youtube).
I'm sure you'll hear more from him soon.

M
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Old 05-27-2009, 05:51 AM #9
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Quote:
Originally Posted by Morgan View Post
Yeah, Rog! Rog8811. Post #5. Bit of legend around here for cool impossible builds and spiros, (puts spiros in fliptop lighters, 7 colour hand-held spiros and the like. I don't know where they are posted on LPF after the move but I'm sure you'll find them on Youtube).
I'm sure you'll hear more from him soon.

M
I know who rog is lol, was just "shouting his name" so he ame to answer xD
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Old 05-27-2009, 05:20 PM #10
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I posted this some time ago, if you try this circuit, you'll find you have much better control over the motor. Might even be better to use a darlington transistor.

http://www.laserpointerforums.com/la...7&postcount=23
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Old 05-27-2009, 08:06 PM #11
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Quote:
Originally Posted by DJZ View Post
I posted this some time ago, if you try this circuit, you'll find you have much better control over the motor. Might even be better to use a darlington transistor.

http://www.laserpointerforums.com/la...7&postcount=23
I can't understand nothing on that picture

Anyway, it seems to be designed for one motor only, I need full control on 3 motors on the same circuit, if anyone can help me on this I'd be really happy :P
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Old 05-27-2009, 09:01 PM #12
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Did someone call?
Morgan is right I used the spiro motors as the LM317 setting resistors to save space in one of my flip top lighter builds.

Are you looking for manual control? If so you just need a pot for each motor. If you want control of motor direction you need a 2 pole changeover switch. The drawing shows the wiring for a 2 motor spiro, just add more motors and pots.

I see no one has answered your mirror question, I use 2mm first surface plastic mirror tile from ebay.

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Old 05-27-2009, 10:34 PM #13
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So it's just the way I alredy posted just by adding changeovers. I see you do not use a pot on the first laser. Why? If I want to get not full figures for example I'll need to decrease the first motor speed right?

The config is just a pot in series with each motor, and each pot+motor in parallel with the battery, right?

It seems easy :P
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Old 05-28-2009, 11:13 AM #14
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Old 05-28-2009, 04:08 PM #15
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Others will tell you that you get different patterns by adjusting the first mirror speed, this is not my experience.
My logic goes like this...
The first mirror produces a circle on the second mirror, so changing the speed just makes it "write" the circle faster or slower, it does not change its shape or size.....so how can it effect the output pattern? (if someone can explain how it would make it different I am happy to learn).

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The config is just a pot in series with each motor, and each pot+motor in parallel with the battery, right?
Yup

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Old 05-28-2009, 04:29 PM #16
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Well, this is a bit difficult for me since It would be alredy dificult for me to explain it in my native language, imagine in foreign langauge xD

"The first mirror produces a circle on the second mirror," but it's not a static circle, it's a dot moving very fast taht gives you the impresion aht is a circle. The fact is, (and here's where I cannot explain myself), imagine the first motor is moving slow, and the second one fast. Now imagine both are moving fast. But do not image a circle being moved, try to imagine the trajectory of the dot at every moment. It's not the same. I'll try to explain myself better with a crappy picture xD

Red line is the imaginary trajection the dot would follow if the second motor was stoped.

Consider the second motor is moving at the same speed always. if the first one move slowly, the second motor can make (for example) 6 spins, in case it moves a little faster the second motor makes 3 spins (for example) in the time the first makes 1. This is the picture explaining both examples.



Yours,
Albert
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