Hi Jim,
I have a bit of a problem with the C bracket ASB-03. It is too short, and when you attach anything to it, the phillips-head screws (for example PHTS-01) on the inner part of the bracket have the tendency to hit the side of the servo mount ASB-04. I don’t know if it’s because I use Hitec HS-645MG servos or what, but it’s an issue if you want the bracket to rotate around the side of the servo mount. For example if I build a robot arm like the one you show in the example on
lynxmotion.com/images/jpg/aarm05.jpg
the wrist bracket woud have the tendency to get stuck. The other bracket, ASB-05, is way too long and it is not practical in many cases.
My suggestion is to make the C bracket ASB-03 just a quarter inch longer - may be even 1/8 would provide enough clearance room.
Cheers,
Gianluca
The parts you have must be old. The very first version of the ASB-04 was taller (when laid on it’s side), and it was made from thicker material, which would cause the problem you described. However it was changed long ago. I appreciate the comments, but the current set of parts do not have any clearance issues.
You can probably easilly remedy your troubles.
The tips of the screws can be ground down on a grinder, cut off with a hacksaw, sheared off with a dremmel tool, etc, after you have put them through the servo horn once (if you do it ahead of time, getting them in the hole may be more difficult).
If you can post a picture of exactly how the wrist is getting stuck, we can try to brainstorm a way of getting around that, as well.
Bending the brackets may be useful too.
You would want two 45 degree bends in place of each 90 degree bend. This would push the center of the bracket out a bit.
As Nick said post some photos, we’re willing to lend a hand.
Ah, so the issue was with the old mounts, not the brackets.
The ASB-04 mounts I have must be definitely the early-generation ones, I bought them right when they first came out. They are indeed made with thicker material than the sheet metal used for for brackets, and they are a bit tall on the side (there is a gap between the side of the servo and the mount).
I bought 16 of them (eight 2-packs), that’s a bummer. But thanks for the useful tips!
