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3Instructables7,289Views22CommentsVirginiaJoined May 29th, 2015
I currently live in Virginia where I enjoy working in my basement wood shop, tending my garden, and occasionally breaking out my stash of K'NEX which I've been building with for over 20 years. I have a degree in mechanical engineering and enjoy designing and building things, including furniture, guitars, and all sorts of mechanical things.

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  • MechMind7's instructable K'NEX Yarn Swift With Yarn Winder Mount's weekly stats: 1 month ago
    • K'NEX Yarn Swift With Yarn Winder Mount
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  • How to Make a K'NEX Rubber Band Gatling Gun with Selectable Drive Modes

    It looks great! Thanks for building it, I'm glad it's working well for you.

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  • How to Make a K'NEX Rubber Band Gatling Gun with Selectable Drive Modes

    Well it sounds like you may have found the rotation issue. Like I said, you may need to play around and tweak some things to get it to work right for you. Don't stress out too much about keeping it exactly the same as mine - do what you need to do to make it work right. As for the swivel base, I'm sorry but I'm not sure what to tell you. There are probably a lot of ways you can make it, but with limited pieces (and I don't even know which ones you have available) it's hard to make a suggestion. I think at this point, my best advice is to just keep experimenting with it until you reach a solution of your own that works, or wait until you can get the right pieces to make my version.

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  • How to Make a K'NEX Rubber Band Gatling Gun with Selectable Drive Modes

    Does the barrel assembly rotate without issues in crank mode? If it works well in crank mode, then the motor may be too weak like you suggested. But if it also struggles to turn in crank mode, there's probably something else going on. There's no K'nex motor more powerful than your own arm ;)I'm not too familiar with a lot of the current sets, so I'm not sure which ones have the large gear. You'll have to look on the K'nex website. If you only need a particular part, you can buy individual parts directly from K'nex, and the "K'nex User Group" (based out of Europe) also has a lot of parts and sets for sale online, or else I'm sure you could find something on eBay or Amazon. As for designing the platform without the big gear, I'll leave that up to your imagination. Do you have an...

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    Does the barrel assembly rotate without issues in crank mode? If it works well in crank mode, then the motor may be too weak like you suggested. But if it also struggles to turn in crank mode, there's probably something else going on. There's no K'nex motor more powerful than your own arm ;)I'm not too familiar with a lot of the current sets, so I'm not sure which ones have the large gear. You'll have to look on the K'nex website. If you only need a particular part, you can buy individual parts directly from K'nex, and the "K'nex User Group" (based out of Europe) also has a lot of parts and sets for sale online, or else I'm sure you could find something on eBay or Amazon. As for designing the platform without the big gear, I'll leave that up to your imagination. Do you have any roller coaster track tubing? You might make a circular track for wheels to roll around...

    Does the barrel assembly rotate without issues in crank mode? If it works well in crank mode, then the motor may be too weak like you suggested. But if it also struggles to turn in crank mode, there's probably something else going on. There's no K'nex motor more powerful than your own arm ;)I'm not too familiar with a lot of the current sets, so I'm not sure which ones have the large gear. You'll have to look on the K'nex website. If you only need a particular part, you can buy individual parts directly from K'nex, and the "K'nex User Group" (based out of Europe) also has a lot of parts and sets for sale online, or else I'm sure you could find something on eBay or Amazon. As for designing the platform without the big gear, I'll leave that up to your imagination. Do you have an...

    see more »

    Does the barrel assembly rotate without issues in crank mode? If it works well in crank mode, then the motor may be too weak like you suggested. But if it also struggles to turn in crank mode, there's probably something else going on. There's no K'nex motor more powerful than your own arm ;)I'm not too familiar with a lot of the current sets, so I'm not sure which ones have the large gear. You'll have to look on the K'nex website. If you only need a particular part, you can buy individual parts directly from K'nex, and the "K'nex User Group" (based out of Europe) also has a lot of parts and sets for sale online, or else I'm sure you could find something on eBay or Amazon. As for designing the platform without the big gear, I'll leave that up to your imagination. Do you have any roller coaster track tubing? You might make a circular track for wheels to roll around...

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  • How to Make a K'NEX Rubber Band Gatling Gun with Selectable Drive Modes

    Hey, congrats on completing it. Sometimes when it is unloaded the barrel assembly, or specifically the spokes, jam up the cam levers if the spokes happen to be rotated in just the right (or wrong) position while the cam levers try to move. That doesn't seem to be the issue here since you say the gun can be loaded and you'll still have the problem. I'll also mention that the barrel assembly only rotates "freely" (such as when you load the gun) while it is in the "neutral" position (discussed in the instructions). But I'm assuming you're having trouble getting the barrel to rotate while trying to fire it in either crank or motor mode? Two things come to mind first: 1) make sure that when you're in either firing mode (crank or motor) that the trigger clutch is completel...

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    Hey, congrats on completing it. Sometimes when it is unloaded the barrel assembly, or specifically the spokes, jam up the cam levers if the spokes happen to be rotated in just the right (or wrong) position while the cam levers try to move. That doesn't seem to be the issue here since you say the gun can be loaded and you'll still have the problem. I'll also mention that the barrel assembly only rotates "freely" (such as when you load the gun) while it is in the "neutral" position (discussed in the instructions). But I'm assuming you're having trouble getting the barrel to rotate while trying to fire it in either crank or motor mode? Two things come to mind first: 1) make sure that when you're in either firing mode (crank or motor) that the trigger clutch is completely free of the brake spoke. The brake spoke is intended to prevent or stop the barrel assembly from rotating when the trigger is released/not pressed. There are some fairly close tolerances in this thing that I had to play around with until they were just right, so maybe individual results may vary? I wouldn't know since I've only ever used my own. The brake spoke interference would most likely be a problem in crank mode since you have to put the trigger into "neutral" for that mode, where it is just barely free of the brake spoke. It looks like you don't have a motor on yours (?) so if you only use crank mode, you might just need some fine tuning in the brake spoke area. 2) the only other thing that I can think of that resists the rotation of the barrel assembly when loaded is the cam ramp. Make sure the ramp and cams are built correctly and that the cam levers run smoothly over the ramp without catching, snagging, etc. Again, you might need some fine tuning due to the relatively tight tolerances. I hope that helps. Mine works very smoothly, so if yours doesn't my best guess is that there might be a slight mistake in yours, potentially as simple as one too many or one too few blue rings somewhere. With so many moving parts, it wouldn't be hard to miss something somewhere.

    On second thought, looking at your picture I don't think the yellow connectors would cause your barrel rotation issue. Try the other stuff I mentioned first.

    On second thought, looking at your picture I don't think the yellow connectors would cause your barrel rotation issue. Try the other stuff I mentioned first.

    I might also add that on the barrel assembly, for those yellow connectors that you used in place of the orange connectors, flip them over so the flat edge faces outward (curved part inward toward the axle) to maintain a smooth line on top of each barrel (except for the "bridge" piece). That will prevent potential interference with your ammo as it comes off the barrel. I wonder if any of those yellow connectors are snagging on the support frame somewhere?

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  • How to Make a K'NEX Rubber Band Gatling Gun with Selectable Drive Modes

    Sure, the platform is optional, but I would still recommend building something to help support the gun and maybe allow it to move around/aim. The design is up to you.

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  • How to Make a K'NEX Rubber Band Gatling Gun with Selectable Drive Modes

    Thanks! I couldn't even fathom a guess at the total piece count. Maybe you could count them for me and let me know? Lol.

    I think most of the orange connectors are on the barrels. You should e able to replace them with yellow connectors. Just make sure the straight sides face outwards along the top of the barrels so that they maintain the smooth top surface of the barrel (except for the "bridge" portion, which you'll get to in the instructions if you haven't already). Other than that, just use your common sense I guess. As long as the yellow connector doesn't interfere with any other moving parts, the substitution should be functionally acceptable.

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