So I have a DPDT Switch that I want to connect to a motor in order to be able to switch its polarity and turn it off.

The model of the switch is MCR13-28E-01 and I'm using a 3V battery energy source. I've done exactly as instructed in all the DPDT online guides (images attached of everything I've just described)

But, it doesn't work. If I connect it without the toggle switch, it works (it rotates slowly, but it does work).

What can it be? The DPDT switch is brand new.... and I know it works because when I try to connect it as just a switch (not in order to reverse polarity) it works as a regular switch

 

Hello,

Do you have the details on the used motor?
As far as I can see there is a gear box on top of it.
What is the gear ratio of the used gear box?

Bertus

 

Hi there,
It's an old motor I got from a workshop who didn't need it. The model is BS138F.12.1470
RoHs

I found this on google, seems about right
http://www.micromotorssrl.com/gear_motor_b138f.html

I know that it requires higher voltage but it works even with 3V, it just rotates really slowly

 

Hello,

At the normal voltage the 1470 would make 1.8 RPM, wich is already very slow.




Bertus

 

And also, the diagram labeled "DC motor rever..." shows just 4 wires connected externally to the switch, excluding the 2 crossover wires. However your picture shows 6 such wires. Where are the extra pair connected?

Normally, 2 wires are connected to the power source and 2 more wires are connected to the motor. Like the diagram you attached.

Can you explain where you have your wires connected and why there are a pair of wires that do not correspond to the diagram you posted?

 

@djsfantasi - I wrote my reply before I saw your post. I'll reply to your post soon.

@ bertus - First off let me say thanks for keeping up with me, why it ain't working is driving me crazy.

Speed doesn't matter to me one bit; I just want to make sure my DPDT switch works, and as I've said if I connect it just to the battery it does work, it rotates very very very slowly but nevertheless it rotates.

Anyway, I tried to do the same with a much tinier motor (I think it's a stepper motor since it rotates only in certain degrees) that works on a much lower voltage and it also didn't work... I don't have the model for the smaller motor I've tried it with but I do have a picture attached, it's a motor that came with the arduino starter kit. On 3V without the switch it runs crazy fast. I'm also unable to get it to reverse its polarity but if I play around with the connections I'm able to turn it off and on with the switch.

 

And also, the diagram labeled "DC motor rever..." shows just 4 wires connected externally to the switch, excluding the 2 crossover wires. However your picture shows 6 such wires. Where are the extra pair connected?

Normally, 2 wires are connected to the power source and 2 more wires are connected to the motor. Like the diagram you attached.

Can you explain where you have your wires connected and why there are a pair of wires that do not correspond to the diagram you posted?

Yes, consider them not connected anywhere. At first those extra wires weren't there; it was "exactly" like in the drawing, but after numerous attempts I got desperate and soldered those wires to try to troubleshoot the issue and try different connections.

 

Stepper motors don't work the same way. It won't work in your scenario. You need a completely different driver circuit. Google "stepper motors"

In order to get your DPDT switch to work and reverse your motor, we need some extra info. That is, please answer my questions in my last post.

 

Cut them off. It confuses the troubleshooting.

 

Straight DC on a stepper motor will only lock it up. (Holding Torque).
Max.

 

Hello,

Also a stepper motor would likely have more connections as a DC motor.
Have a look at the following page for some more info on stepper motors:
http://mechatronics.mech.northwestern.edu/design_ref/actuators/stepper_intro.html

Bertus

 

@Max & Bert - OK, my bad for trying to use stepper motor as comparison.

@djs - OK, considered them cut. Now it's exactly like the drawing.
As to your question (I believe it's just one that I didn't answer), here is my wiring diagram that I just did (if I were to take a picture, it would look too messy).

 

Hello,

The way it is on the breadboard, it would short the battery and the motor will not work at all.
In your openings post you used the following wiring diagram:

Bertus

 

It's been a little while since my electronic college days even then it was all chalkboard and nothing practical so I'm struggling in converting diagram to real life. Could you please show me how the connection would look like on a breadboard?

 

Hello,

I downloaded Fritzing and made the following drawing for you:



I could not find the motor symbol, so I used the white symbol for the motor.

Bertus

 

First off-- thanks for downloading Fritzing for me hope it would serve you for more than just me^^

However, that's exactly what I did except I didn't show that I crossed the wires since I figured that was a given... my bad assuming it would a given. Here, let me just show you a picture of my connections so we're on the same page; it's not as messy as I thought. I'll also redo my Fritzing accordingly and add a picture of my toggle switch backside again.

 

Oh wait a second, I forgot one wiring that I have that you don't... the middle section of the switch. Is that my problem? I shouldn't have soldered the middle section together? I have no idea why did I do that. That must be what's causing the short circuit

 

Hello,

Do I see a connection wire between the two centre connections of the switch?



Bertus

 

Yep, I'm an idiot! Must've did the middle solder because of looking at multiple resources or just a brainfart, who knows. Thank you very much for showing me the way, I got it to work.

If there was a way I could give you karma or 5 stars ratings, you'd be getting it all right now! Much much appreciated!

 

You first need to learn how to use a breadboard. Then you'll be able to figure out how your diagram works or doesn't.

https://learn.sparkfun.com/tutorials/how-to-use-a-breadboard