Sign in to our website and become an InMoov member. It will allow you to post message, pictures, and share with others InMoov builders. It's just one click away!
Username or Email Address
Hans-Jörg posted an update 3 years, 9 months ago
the ball-bearing rotcenter is online, the pivcenter follows in a few days.
Where do you get the ball bearings? I like your work. For myself I like the idea of no ball bearings though. That is just my preference. I like that this can mostly be printed without a lot of extra parts to buy. Even if a ball bearing installation is much more efficient. You’ve done nice work though.
I like the idea of no ball bearings too, but as I began with my InMoov there was one problem, the circle holes are not realy round and the move of my head not realy even. You need a big Servo with a lot Power to move it.
With the Arms it is the same, a lot of Power from the Servo is used to move the wormgear. With the ball-bearing I move my wormgear easy with to fingers, if you use a Batterie and not a Powersupply it will rise the running time extreme.
You can find the 61709-2RS in the bay, but they are very expensive if you buy once. I try to get a spezial price from a reseller, 10€ up to 15€ per wormgear is ok.
Brilliant… Love this setup. I am using much stronger servos than the 805bbs too so this is something I would like to use. I also have been experimenting with a new low temp Poly carbonate so now my PivCenter, worm and Piv Gears are incredibly strong as well… Nice… thanks
So are these the correct sizes in mm-
689 bearing is -9mm x 17mm x 5mm
61709 bearing is-45mm x 55mm x 6mm
I just done a quick search with the bearing Numbers you gave and this size keeps showing up -just like to double check before parting with any money- plus i might some in the bearing bin back on the farm-
Nice work on the Mod, looking forward to using it- i was about to start modifying that part to put at least one bearing at the end of the worm gear – so that’s excellent you done both rotational points- I was i bit worried about the friction caused by the weight of the arm at these points,,,,
yes, that are the correct size of the ball-bearings.
I found a reseller, where you can buy a Set of ball-bearings ( 2 x 61709-2RS and 1x 689-2RS ) for 10€ incl. shipping to Germany ask me for contact.
I already brought x4-61709- for $26au from china- about 15min after we last spoke,,,, i can get the 689 for $5each in australia,, but thats good to know that you found a seller, im sure there there will be plenty of people looking for them- printing out your mod right now- will post a pic on your Thingiveres account when finished–
The Piv-center is ready for download.