SMC3 based DIY 2DOF from NZ

Quick little strengthening update. Haven't played with the tuning profile yet but a little more progress anyway.

Casual Sunday meant I was able to study where my rig was weak, find some leftover steel in my scrap bin and try to fix the problem. In the below picture circled in red is where my original motion platform idea finished and where the new motor placement joins. As mentioned in an earlier post, the original idea was to have the motor extension removable to make shifting the rig easier. Problem was the joints weren't tight enough and no amount of torque on the bolts was able to stop flex at these joints. To combat this, previously what I did was solid weld the joints which has helped but due to the limited surface areas created by the original idea, there was still flex I wasn't happy with. As you can see there was only about 60mm surface area on each face



Basically I underestimated the strength of the motors and the mass weight movement so I have had to now come up with some cross bracing/load transferring angles/joints scenario. Bring in the scrap steel and guestimation mounting location! I had some 7mm plate lengths so I have trimmed those down to try make them look a little more appealing or less invasive

The general idea was to creating a point as close to the motors as possible while trying to distribute the load onto the main base. Im sure there are better ways to do it but this was the scrap steel I had to work with. I haven't tested it yet but even just to try move it myself, it does feel more solid and robust. When i lift the end points where the motors are mounted, the whole base moves rather than just flexing at the extension joint.

I'm not going to excuse the cabling mess because i think that is expected in any DIY rig but my welding has plenty of work to go. In saying that, before this project, I had never done any welding and I am an IT Network Engineer with soft hands... HAHA

Bang up Job James, Keep it up eh.