A company I work for is planning on opening a branch location. We will be sending partially constructed welded structures, and a crew on site will be responsible for finishing them. The structures will be up to
12'x12'x40' in size.As it is, it is not unusual for the shop guys to ask our design department to come up to help resolve an error or omission. While we do plan on spending more time to do detailed drawings, there is sure to be times when having the designer on site will be helpful.
I am thinking about proposing that the company make (or purchase) a telepresence robot (OK, I know it is not really a robot). I did a little searching on the net, and didn't really see anything that looked viable. Low cost is an important thing if management is to bite, plus making it ourselves would be fun.
At its most basic, just a manual push-cart with a laptop, web cam, and wireless networking could be useful. At its most basic function, the remote shop guy can just push the cart to where they need it, and point the camera at the area in question. They can also use the same cart to view the 3-D models we create of the design. The designer can do some remote desktop sharing to point at areas of interest on both the camera image and the 3-d model display.
But, of course the real telepresence thing comes in if the designer of the structure can move the mobile device around to get a better look. Perhaps also use a laser pointer (mounted to the camera) to point to things on the actual structure as he is talking.
For locomotion, I picture omni-wheels as being the most straight-forward method. This is because I picture the user doing a lot of left-right and forward-backward motions while looking in the same direction with the camera. Another motivation for the omni-wheels is that I can see a secondary use for this robot ; to draw on the shop floor some complex curves we design and annotate it with a little text. A robot that had differential steering would seem to have a hard time doing the maneuvers to draw text.
The problem with the omniwheels, is that the ones I see for sale seem pretty small for my application. This will be on a welding shop floor. There are commonly 1/2" Diameter cables laying on the floor, and the commercially available wheels are certainly unable to transverse those cables. I've also seen a movie of a forklift using omniwheels... so obviously the concept has successfully been scaled up.
But before I start to try to design and build omni-wheels from scratch, I want to consider if I've shot down the differential steering option too quickly. If I make a rotating head for the robot, and make it so that it automatically keeps oriented in one direction while the base rotate, perhaps they will be just fine.
Any comments on what I've discussed so far?
Joe Dunfee