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Messages - mathsboy314

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Project Ideas and Help / Re: Motorized lazy susan?
« on: April 20, 2017, 05:44:44 am »
If you're happy with the turntable going at 5.8 RPM then the gearing wouldn't be too hard, as you'd only need a small blue and large yellow gear.

Project Ideas and Help / Re: Multi-Wheel Ferris Wheel?
« on: April 06, 2017, 12:16:38 pm »
I'm not exactly sure what you mean, but this might help you design the gears:

Project Ideas and Help / Re: Knex Computer
« on: April 06, 2017, 12:10:33 pm »
I could turn this into a selector, but I can't think of a reason I'd need logic gates.

I could also use this to engage/disengage a motor, but again, I can't think of a reason I'd need logic gates to do that.

Project Ideas and Help / Re: Help with Drawer Mechanism
« on: January 13, 2017, 09:02:27 am »
How big do you want the drawer to be?


I had a plan to make that, but add in an entrance track, exit track, and a way of resetting the element.

Then I forgot my plan.  :-\

Forum Games / Re: The last post wins!
« on: January 06, 2017, 12:39:59 am »
“You want to know the difference between a master and a beginner? The master has failed more times than the beginner has even tried.”

Site Feedback and Questions / Re: how do you make your instructions ?
« on: January 06, 2017, 12:37:33 am »
Here's my method:
  • Build the machine that needs instructions (duh)
  • Take it apart in chunks. Each chunk is a separate step
  • Photograph each chunk from a few camera angles
  • Select a 'base' chunk
  • Add another chunk to that, take photo
  • Repeat previous step until all the chunks are joined, and the original model is rebuilt

General Knex Discussion / Is this a real piece?
« on: December 17, 2016, 11:44:20 pm »
Is this a commercially available piece?

Project Ideas and Help / Piece Efficient Elements
« on: December 03, 2016, 07:12:46 am »
I'm nearly finished a ball machine and I'm running low on pieces. I've ran out of yellow connectors and grey rods (and nearly ran out of red rods).

What are some piece efficient elements? I need to build a path that goes the length of 5 red rods, and a lift that goes the height of 2 red rods. Any suggestions?

Project Ideas and Help / Re: Knex Big Ball Factory
« on: November 29, 2016, 12:23:46 pm »
You can download it here:

If that link doesn't work, try this one:

What's the difference between sets 52443 and 63045?

Project Ideas and Help / Re: Help with levers
« on: November 19, 2016, 11:25:55 am »
I fixed it. The problem was that the scaffold holding up the element was very unstable. Every time the ball went on the arm, the pieces holding the arm would bend a lot.

Project Ideas and Help / Re: Help with levers
« on: November 17, 2016, 10:55:05 pm »
Could you make the arm heavier?
The element has 2 arms. When one goes up, the other goes down.

You could also try to drop the ball from a greater height into the arm
I'll try that.

Project Ideas and Help / Help with levers
« on: November 17, 2016, 06:08:35 am »
I need some help making an element. I explain the problem in this video:

Project Progress / Re: New Knex Ball Machine
« on: November 13, 2016, 01:18:57 am »
That's a lot of gears! Is it all powered by one motor?

General Knex Discussion / Re: Where can I buy those motors
« on: November 07, 2016, 01:40:18 am »
Are there any other uses for the white gears? I have three of them but no motor.

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