[ranch vermin]

Ive got this hooked up to a linear drive,  its not quite working yet, but im closest ive been for a while,   i think my theory is right, i just cant get it to work because it just takes so long to get things running for real, so much goes wrong and wires are so confusing to me still.

This circuit can be upgraded with transistors (guns :-)) in a h-bridge type setup to get less waste away from the motors - but still retain the absolute positioning.
It should be very accurate, just the circuit sans the machine,   i bet this circuit upgraded could step nanometres, electrically controlled.

[Art]

Hmm...I think I asked you not to talk about me that way...
"Lacks power but simple", really?! 

[ranch vermin]

No way Art, your special to me.  =)

[Korrelan]

Hi Ranch

Have you burnt the two potentiometers out yet lol.

 

[8pla.net]

Simple is good.

[ranch vermin]

Hi Ranch

Have you burnt the two potentiometers out yet lol.

 

Nah thats old news, I did that ages ago    I killed em on the first day I got them  ($24 down the drain.)   your right of course.  got to be careful,  all my transistors are blown too. hehe

I actually use toaster wire for it and my own brushes,  but the problem is its not resistive enough.
Im pretty sure it works,  the easiest setup (which is even simpler than this)  is power left motor left pot, power right motor right pot, and my pully string has a tug of war,  its just my big problem is i have to get the amount of ohms on the pot to dissipate all the watts, or it just loses it as constant bias against itself.  (it took me 4 weeks to work something so simple out,  i think its the cigarettes.)

One thing id like to say about "pully wire systems" is they work pretty good pretty much first time,  just get some proper superglue (bostik is good, in australia.  if u superglued your hand to the table with it, you have to chop a block out of the table to get your hand off.)   you can superglue some fishing line, which is pretty tough, and then it just winds easy after that, i find they dont even have to be neat as long as your battery is strong enough to get through the viscocity. they were the least problem of the linear drive setup as long as you brace them properly, and they act as a anti-clockwise, clockwise to always clockwise converter,  because it doesnt matter which way you wind, they always pull.

But the good news is, I actually got something to work!!!
https://www.youtube.com/watch?v=Vt4avBzSgTg&feature=youtu.be



8PLA,  the other alternative is the H-BRIDGE (potentially resistors diodes and transistors all over the place and takes ages to put together).  and all the methods that power motor involve getting some loss of your energy, and the most complex systems deliver 100%,  but its hard to get it perfect. 

Thanks .   dont worry ill get there in the end.  As I see it currently,  a robot is a bit like a fuse box to a house, one receptacle per motor in the body.    So concatenating the design is possible, and thats what I want to do,  because of fuse boxes can get more and more complicated the more tricks they put into them,  but its actually not mandatory, if u want to keep things simple, as long as you know what your doing.

[ranch vermin]

heres the expected full concatenated circuit,  its very simple.


EDIT - X no Ive done it wrong...  woops....

[Art]

Looks as if this setup will be good for lighting one of your cigarettes.

OH yes...Do get a bottle of Nail Polish Remover (acetone) and keep it nearby for those "Superglue accidents".

[ranch vermin]

yes they do glow when the watts is up,   i need to get something better thats more resistive.
If i just want 16 positions, I can just chain up that many resistors,  but i was exploring getting a fluent value, for attempting to get micromovements.

[Korrelan]

No... No... And thrice no... Lol.

Acetone is extremely flammable. Don't put it near that circuit, perhaps a fire extinguisher too lol.

I do admire your 'inginuety' and hate to be the bearer of bad news, but that circuit ain't ever going to work Ranch.

 

[ranch vermin]

no hurt feelings.    im just on my little learnin' journey, the same as everyone here on earth.
oh well at least my little motor oscillator hack worked.

Korrellan - what do ur circuits look like?  I know that you get your hands grubby in the hardware,   you should post an electromechanical thread.   
Id love to see your take, i promise ill be respectful. 

[Korrelan]

Your post 666...



I will reply in a mo...

 

[Art]

The acetone was for removing stuck fingers from whatever they might be or have been Super Glued to...Not for use in or near a live electrical circuit. Likewise, no smoking should also be the rule when near Acetone or other flammable substances. I should not have to say that.
I thought that would be implied, then again, McDonalds has a label on the side of their coffee cups, "Caution Contents is Hot!"
This is due to an Accidental Spillage of a cup of Hot coffee in a lady's lap while driving her car. Like people need to be told that freshly served coffee is likely to be Hot! Oh well. Ya live and ya learn...at least some do.

[ranch vermin]

how longs a mo im still waiting!

[Korrelan]

@ Art

I wrote that in a hurry on my phone… I hate typing on my phone.  I understood your acetone reference; I was just making sure Ranch knew it was highly flammable lol.

I acquired some new storage boxes today… this sticker made me smile.



@ Ranch.

Soz for the delay… things keep interrupting me lol.

In my past I have done quite a bit of electronics design… yeah quite a bit… lol. 

I used to build my own control gear, but these days there is just no need.

If its pneumatics, hydraulics, DC motor, servo, stepper, ADC, DAC, timers, etc there are loads of pre-designed boards available.  You just plug them up and write the control code.

https://www.phidgets.com/?tier=0&catid=0&pcid=1

I’ve used Phidgets for loads of projects. 

 

Ed: If you require a simple method to control a DC motors speed try using a triac. 

https://www.electronics-tutorials.ws/power/triac.html

Though this won't give you proportional feedback.  About the simplest proportional circuit uses a NPN/ PNP transistor gate arrangement.  A simple LM741 OpAmp drives the gate. (not my design).