Author Topic: Window of Opportunity Ball Machine  (Read 432 times)

Offline mmtunligit

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Window of Opportunity Ball Machine
« on: November 10, 2017, 05:52:36 pm »
Hi all, this is the first update video for my Knex ball machine that I'm working on. I'm pretty low on parts, but hoping for some for Christmas.

Link to path switch briefly showed in the video: https://www.instructables.com/id/Knex-3-Way-Geartrain-Switch/
« Last Edit: November 10, 2017, 05:59:05 pm by mmtunligit »

Offline mathsboy314

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Re: Window of Opportunity Ball Machine
« Reply #1 on: November 11, 2017, 11:43:33 pm »
When you say "flat base" are you asking about the white floor that the ball goes on or the frame that holds the white floor?
The frame should be flat on the ground, and the white floor should be on at angle. The only reasons I can think at to why your white floor would be flat is:
  • You know that the ball's momentum will direct it to a certain side of the floor
    (sort of like a path but nothing keeps the ball on the path)
  • Your bedroom floor is not flat
  • You're making the floor from Sandro's Elysium
    (https://youtu.be/_ApMoeGhc6o?t=27s)
The white floors that look nice are often at a very subtle angle, enough to get the ball to a certain point on it.
« Last Edit: November 13, 2017, 04:09:06 am by mathsboy314 »

Offline mmtunligit

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Re: Window of Opportunity Ball Machine
« Reply #2 on: November 12, 2017, 03:48:16 pm »
no, i'm asking about the structure that holds the white floor, I see alot of people raising it up by a blue rod, is there any particular reason for that? should I do it too? like in the first update video for  citadel, the floor is raised up a little, what's the reason for that?
« Last Edit: November 12, 2017, 03:57:14 pm by mmtunligit »

Offline mathsboy314

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Re: Window of Opportunity Ball Machine
« Reply #3 on: November 13, 2017, 04:08:51 am »
I can't find an example of what you're talking about. Could you maybe show me a screenshot or tell me the timecode on the video that you're looking at?

Offline Sorunome

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Re: Window of Opportunity Ball Machine
« Reply #4 on: November 25, 2017, 02:38:44 pm »
no, i'm asking about the structure that holds the white floor, I see alot of people raising it up by a blue rod, is there any particular reason for that? should I do it too? like in the first update video for  citadel, the floor is raised up a little, what's the reason for that?
Having the floor up a bit makes things easier: You will have to lift up balls somehow, and there are very few lifts that lift up a ball from ground level, usually they start at like a blue rod height, or even a red rod height
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Offline mmtunligit

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Re: Window of Opportunity Ball Machine
« Reply #5 on: November 25, 2017, 07:21:12 pm »
Thanks, I've decided to have a split level floor, since the lift i'm developing will be able to pick balls up directly from a white floor

Offline mmtunligit

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Re: Window of Opportunity Ball Machine
« Reply #6 on: January 31, 2018, 09:58:38 pm »

Offline Tornado96

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Re: Window of Opportunity Ball Machine
« Reply #7 on: January 31, 2018, 11:46:19 pm »
Nice update. Its small but I really like the curved path in that section near the white floor. Looks like a good compromise you went for with the ball arm. Do the balls ever fall off the track at the end there?

Whats your part count situation? It sounds like you may have bitten off a bit more than you can chew with the size of this compared to how many parts you have. What sort of pieces have you run out of?

To cut down on pieces, I would recommend ditching the white floor (That thing churns up green rods which are so useful elsewhere) and what I think would be cool is making a machine thats longer than it is tall. Have it at about the height of the ball arm as the max height.

Up to you though. You know your situation better than anyone.

Offline mmtunligit

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Re: Window of Opportunity Ball Machine
« Reply #8 on: February 01, 2018, 01:19:46 am »
I probably have bitten off more than I can chew, but i'll be dammed if I don't try my hardest to finish it  :D. I'm mostly out of rods, but just parts in general, but that isn't too much of an obstacle. I won't be ditching the white floor, as it's pretty central to how I want the machine to look. as for length, I can't really make it longer because of the space that I have to work with, and I have to have that big open space to get to the window. Thanks for the feedback though!

Offline YoloSweggLord

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Re: Window of Opportunity Ball Machine
« Reply #9 on: February 01, 2018, 06:24:32 am »
I quite like the look of this, the jump track is especially elegant imo. It will be interesting to see how you work around the window.