waterboysh
spending too much on rocks
Member since April 2021
Posts: 386
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Post by waterboysh on Feb 7, 2023 9:38:35 GMT -5
dillonf check out this post I made a while back about adjusting the Lot-O dowel and the difference it can make. You probably need to adjust yours.
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zebra61
starting to spend too much on rocks
Member since January 2024
Posts: 161
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Post by zebra61 on Aug 13, 2024 16:09:36 GMT -5
When you buy a hammer everything becomes a nail. (Wish I knew who came up with that) So I've been watching this thread with great interest ever since Drummond Island Rocks first posted it. That prompted me to immediately order my own ToAuto motor and put it on the shelf for future use. Then I got a wild hair and bought myself one of these fancy 3D printers without knowing a thing about them. (nothing new) And the first thing on my list was to design and print a simple conversion plate for the ToAuto to mount on the Lot-O and make it into a ToLot-O vibe. The 'want' to do this was to preserve the Lot-O frame in it's original form. I've been playing with this for weeks and testing the mounts and having setbacks and failures along the way. It's tough to start from scratch in the CAD world and learn on you own. (and I'm Norwegian to boot..) But over the last three weeks one of my little plates has managed to hold up and keep running without failure. Heat and vibration is tough on printed plastic parts but changing the type of material being used and some of the design has paid off.   This is a quiet combination and very quick to mount/dismount if needed. Believe me, there have been lots of changeouts. But after obtaining a 2nd frame for testing it became quite apparent that there are physical variances in the Lot-O frames that complicate things. I've given a couple of these to friends only to find out that things can be off as much as 4mm on mounting holes. This isn't a roadblock, just a road bump. To whoever made the first conversion to the ToAuto motor, my hat is off to you. Thanks a bunch! I'm even more in love with my Lot-O tumblers now. Once the design is finished and proven I'm planning to release the design files so others can print a copy for themselves. |
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Post by chris1956 on Aug 13, 2024 18:35:49 GMT -5
That looks great! I keep thinking I need to get a 3D printer. As an engineer I found out that vibration is a tricky issue. Small changes in weight, stiffness, and distance to the source make big differences in the amplitude of the vibration at different points. It can be more of a trial and error thing than calculating it from formulas although I once used calculations to show that the structural beams on a floor supporting large pumps and motors wouldn't cause large vibrations.
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zebra61
starting to spend too much on rocks
Member since January 2024
Posts: 161
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Post by zebra61 on Aug 14, 2024 7:27:35 GMT -5
That looks great! I keep thinking I need to get a 3D printer. As an engineer I found out that vibration is a tricky issue. Small changes in weight, stiffness, and distance to the source make big differences in the amplitude of the vibration at different points. It can be more of a trial and error thing than calculating it from formulas although I once used calculations to show that the structural beams on a floor supporting large pumps and motors wouldn't cause large vibrations. Well if looks would solve the problems I would have been done a while back. Truthfully I think tearing off the old fan/motor mount and bolting it directly to the frame (as Drummond Island Rocks demonstrated) in is the BEST most practical way to do it. Pull that mounting plate, drill 4 holes, add some bolts, plug it in and make adjustments to the fulcrum and life is good again. I absolutely LOVE how quiet this tumbler becomes with the ToAuto motor. You're absolutely correct about changes in weight, stiffness and distance which is something I learned from this. If you look at the original photo the wood dowel was replaced it with an adjustable bar to make things easier. It was an eye-opener to witness the difference that very small changes could make. As you mentioned 'amplitude'!!! NOT BEING an engineer I have to depend on Norwegian stubbornness and plain dumb luck. But truthfully it's been kind of fun. And now I'm really tired of the experiment and I just want to keep my ToLoto in production mode. Hoisting the 90lb contraption up to my workbench for inspection and plate changes is getting old. (and I'm too out of shape for weightlifting) An engineer SHOULD have their own 3D printer chris1956 that's for sure. I'd encourage you to look at the BambuLabs A1 Mini if you get serious about it. They're under $200 and almost foolproof. And looking through some of the designs that users share online might be considered porn for engineers!  |
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Nov 14, 2024 18:17:57 GMT -5
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