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Simon Cartlidge posted an update 7 years ago
Just getting started out, I’m really looking forward to the whole adventure of building this, I have been teasing my 17 year old son that I’m building a replacement son for when he leaves Home.
I’m just having a bit of a problem with where to fit the extra servo for the articulated thumb, I can’t find a rob part for the arm with the extra 4 holes in. Can anyone help me find the file or tell me where I’m supposed to drill. Thanks.
Hay Simon ,,,Last time a looked at the articulated thumb by Anar it is just a manual adjuster with no Servo based movement,,,,
Thanks Mindless, it was just looking through Gael’s instructions for the forearm build, he seemed to have 4 holes in the side which you have to redrill and put the bushings from the servo in. All the files I’ve found so far don’t seem to have those 4 holes and I don’t know where to put them.
Hay your right they did get the extra Servo hooked and-up working by the looks of it,,, but i have No idea on using it,,, -I’m still a primate when comes to certain stuff,,,,, and the control mechcanizime for the fingers is one of them ,,,,, sorry dude
You have to make a choice, either you use an extra servo for thumb or you set the spring tensioner. Both are to be set at the same location. Personaly I was never thrilled about that extra thumb actuation, because the demonstration videos I had seen didn’t convince me. But regardless, you can still attach the servo, there is holes to set three screws. http://inmoov.fr/wp-content/uploads/2018/01/photo2.jpg
Thanks Gael, it’s great to have your personal input, this is such an incredible project. I think I’ll take your advice and stick to the original design, I wasn’t happy with the way that thumb joint printed anyway. Do you have any suggestions as to where to source the springs? I’m having a real problem trying to find any. Also, what is their outer diameter? Thanks so much.
Hello Simon, In the Hardware and BOM page:
Default Hardware Map + BOM
10x extension spring 0.51mm diameter, 1cm length(13/64″x13/16″) You can find boxes on eBay for exemple: https://www.ebay.fr/itm/Neilsen-150-Piece-Spring-Assortment-Various-Metric-Sizes-Storage-Box-8T/371323746282?hash=item56749eb7ea:g:W6MAAOSwqu9VTfb~