Need help with my latest MOC

[jojoguy10]

Hello fellow NXT'ers!

I'm building a robot that makes you chocolate milk (YAY! ) I'm having trouble with the pump tfor the milk. You can see here in the picture: http://www.ge.tt/#!/8sMJAa7/v/0

I will try to explain the best I can.

Here's what supposed to happen: There's a motor that runs the pump and the switch. The switch is meant as an on/off switch (and to switch between different types of milk). When I tell it which milk I want, it switches to that, runs the pump, and the milk comes flowing down into the glass (because the air is replacing the milk. The milk has to go somewhere )

Here's what's happening: When it switches to the right type of milk, and runs the pump, the milk flows fine, but at the switch, the OTHER type of milk (that's NOT being put into the glass) is flowing out of the other side of the switch. That's how the pneumatics switch is supposed to work.

So, I guess what I need is help on making a design that still has 2 motors (1 NXT and 1 PF motor), but can still pour two different types of milk.

Will the 2x4 distrabution block work? http://www.bricklink.com/catalogItem.asp?P=4692

Thanks!

jojoguy10

Edited September 9, 2011 by jojoguy10

[timslegos]

Hello fellow NXT'ers!

I'm building a robot that makes you chocolate milk (YAY! ) I'm having trouble with the pump tfor the milk. You can see here in the picture: http://www.ge.tt/#!/8sMJAa7/v/0

I will try to explain the best I can.

Here's what supposed to happen: There's a motor that runs the pump and the switch. The switch is meant as an on/off switch (and to switch between different types of milk). When I tell it which milk I want, it switches to that, runs the pump, and the milk comes flowing down into the glass (because the air is replacing the milk. The milk has to go somewhere )

Here's what's happening: When it switches to the right type of milk, and runs the pump, the milk flows fine, but at the switch, the OTHER type of milk (that's NOT being put into the glass) is flowing out of the other side of the switch. That's how the pneumatics switch is supposed to work.

So, I guess what I need is help on making a design that still has 2 motors (1 NXT and 1 PF motor), but can still pour two different types of milk.

Will the 2x4 distrabution block work? http://www.bricklink.com/catalogItem.asp?P=4692

Thanks!

jojoguy10

When i tried opening the first link my firewall blocked it saying it was malicious. Please upload to a more common site like Brickshelf.

tim

[jojoguy10]

Sorry about that. Here's the image.

jojoguy10

[mescalinum]

@jojoguy10 can you remove the T-junction and make 2 tubings go towards the glass?

would that solve the problem?

or I didn't understand what the problem is?

Edited September 9, 2011 by mescalinum

[Sokratesz]

I think it's possible that because of the T junction, once milk from one bottle starts flowing it 'draws' out milk from the other.

never mind I think I misread you:

What you want is make it pump either one or the other with one motor. You can do that by using one compressor and two switches, one for each bottle of milk.

Also watch out with milk, it spoils easily and smells terrible once it does, you don't want your LEGO filled with that ;)

- Sok.

Edited September 9, 2011 by Sokratesz

[jojoguy10]

Thanks you guys!

I will try those ideas!

jojoguy10