Jarvis – Body Building

Its high time my suspension and my wheels got connected to a chassis . We need a place to house all the electronics and general payload of the robot . I used Fusion360 to put together some rough designs that used 2020 extrusions and milled plates to build a chassis.

One of these days I’ll remember to screenshot at the time and not just take a picture on my phone.

The basic layout so far looks like this, with plates I am going to mill on the Shapeoko and then I will connect these plates with the extrusions. The suspension will mount to the middle sections with some 3d printed components.

I did not loke the finish on these plates, but I think it was more the wood I was using and the fact I used an upcut endmill than the machine’s fault. In hindsight a down cut would have been better. There is a good post here that explains the difference: How To Choose Solid Carbide Spiral Router Bits | Infinity Cutting Tools Blog (infinitytools.com)

It takes a lot of balls to play golf the way I do…

At this point a few things are starting to glare me in the face:

  1. this robot is wider than it is tall (doesn’t look cool)
  2. it has ground clearance challenges because the suspension protrudes lower than the hubs
  3. the plates don’t attach well to the extrusions, and there is a lot of flex

This badly shot video shows how well it scales over objects:

Not willing to stop doing a bad design to death I wanted to at least get some forward motion happening and try and learn all I could from this platform. I added back the steppers so I could try moving the robot

Here’s a look at the underside

and here’s a side profile

I am very proud of what I’ve made here, but it is not perfect. So I think I am in for some pondering. I need to decide where I go from here. I have some ideas, and I’ll reuse some of my parts here but I think my next post will have things starting to look a lot different.