ANNIN ROBOTICS

J4 wiring, motor and driver were fine...apparently I lost the set screws for this particular pully and thought I would remember they were missing but did not when I picked back up on it a year later.....shaft was spinning quietly in place. Robot is good now.

Apparently I misinterpreted the labels on the mega shield; all jumpers d2-d13 were shifted up one hole. I still can't get J4 to respond but all others are; I'm assuming it's a separate issue w/ J4.

If I want to sell my completed AR2 in order to buy and build a new AR3 kit, is that ok? Not as a business just to fund an upgrade.

I was going to ask the same question as I am going to upgrade my partially completed AR2 to an AR3 and also have the 7th track parts to build. Seems to me it would be ok to use that part with or without encoding depending on application. I like the teknic servo motor but $257...ouch.....:)

So the bulk of the cost of upgrading is just the motors it sounds like https://www.omc-stepperonline.com/only-motors-of-ar3-open-source-robot-package-kit.html I am about 85% done w/ my AR2 but it got stalled when my dad got sick...I think I'm going to just go for upgrading it to the AR3 since I can re-use so many of the parts. At first I thought I needed new aluminum kit, hardware kit as well as stepper drivers.

Ok I will finish the AR2 as-is and then try the AR3 afterwards as a separate project. Thanks!

how do I make a new post? I can only see how to make a new comment.

About the ROS leading to exposure, I agree. I searched the ROS pages for ROS-enabled robots and if had seen AR2 there and the kit prices I would have bought one right away instead of spending months trying to figure out which arm to try for my first real robotic arm.

I just wanted to point out, there are some relay boards at least that have a jumper you can remove to supply an external 5v (or whatever) source to do the actual tripping of the relay. I ran into that recently doing an nodemcu project and discovered my multiple-relay boards had that feature. Not sure if that is the same thing you are referring to.

I just got my hardware and aluminum parts in today and am waiting on the electronics package. After the build my focus will also be ROS so I will be glad to help out however I can. In my limited experience the URDF and moveit packages are the hardest part, if we have a head start there hopefully we can keep the ball rolling.

I am planning to try this at first because it looks affordable. https://www.youtube.com/watch?v=3OjhoVuAQkQ