I had broken one of the Dremel hand shafts not long ago. So i got the new one running and cut up the old one. The centre was just about perfect for the flex shaft in the arm. So I cut 2 35mm sections and cleaned up the ends. Then drilled out the brass couplers provided and the servo adaptors to take the 3mm shaft.
The brass bits were great, so easy. The servo couplers were a nightmare. The Allen key provided didn't fit the grub screws and the screws didn't fit the adaptor. So i ended up just gluing the shaft into the adaptor, but the hole is tight and almost threaded, so should hold ok. But only after a lot of playing.
Grease was needed on everything, it really helped, and also the plastic bush when fully pushed on flared due to the ali of the paw doing so. So that was trimmed by about 1.5mm in length, with that it rotated quite easily under servo power. But took a bit of playing to find the right answers.
So with that i painted one arm and sorted the other's mech. Then painted the 2nd arm. :)
Today i reassembled the painted arm. The long grub screw for the paw to bush didn't want to go in, so i cut it short and it only grips one side. It runs beautifully. :) Shame about the wiring colours, i will have to connect these to correct extensions in the body, but it was the only wire of that thickness i had.
2nd one can wait another day. This one is a day older and the clear is still a little soft.
No comments:
Post a Comment