mescalinum Posted September 21, 2012 Posted September 21, 2012 Hi I need a strong turntable for a robot arm. I've seen strong turntables made with the very expensive droid wheel: I was wondering if it is possible to do it with the lime wheel as well: can anyone confirm? Quote
DLuders Posted September 21, 2012 Posted September 21, 2012 I just went to my basement to try out a "sandwich" of two Lime Green 59521 "Wheel Hard Plastic Spoked Giant Thin (160mm D. x 28mm)" parts. I could place 28 ea. of the official Lego Soccer Balls into the circular "track" to act as ball bearings. However, the "turntable" does not rotate smoothly like two Hailfire Droid wheels would. That's because there are small plastic "nubs" sticking into the circular track area, directly beyond the green spokes. I'm not sure how useful those green wheels would be anyway, since the interior spokes would strike any electrical cables routed through the center of the turntable. Quote
Alasdair Ryan Posted September 21, 2012 Posted September 21, 2012 (edited) You may need to skip the first bit of the video. I am waiting for it to get shortened......... Edited September 21, 2012 by Alasdair Ryan Quote
mescalinum Posted September 22, 2012 Author Posted September 22, 2012 I just went to my basement to try out a "sandwich" of two Lime Green 59521 "Wheel Hard Plastic Spoked Giant Thin (160mm D. x 28mm)" parts. I could place 28 ea. of the official Lego Soccer Balls into the circular "track" to act as ball bearings. how about using plastic wheels instead of balls? Like shown here or also here: Quote
DLuders Posted September 22, 2012 Posted September 22, 2012 I tried those small Lego wheels in the perimeter groove of the green 59521 wheels, and they don't work because they are not TALL ENOUGH to prevent the "teeth" of the green wheels from meshing together. Even if they were tall enough, those small plastic "nibs" (opposite each of the three spokes) catch the rolling wheels and the action is not smooth. Quote
Alasdair Ryan Posted September 22, 2012 Posted September 22, 2012 What about puting tyres on them..... Quote
DLuders Posted September 22, 2012 Posted September 22, 2012 The tires would still get "hung up" a bit on those plastic "nubs". Of course, if you're not a "Lego Purist", you could take a Dremel and CUT OFF those nubs.... Quote
Alasdair Ryan Posted September 22, 2012 Posted September 22, 2012 The tires would still get "hung up" a bit on those plastic "nubs". Of course, if you're not a "Lego Purist", you could take a Dremel and CUT OFF those nubs.... Why the face?....... You might be better using my design above and then sandwiching another one of those green wheels on top via the turntable in the middle. Quote
sqiddster Posted September 22, 2012 Posted September 22, 2012 Cut the nubs off. Nobody will ever know Quote
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