Hello folks,
I am designing a machine to make high altitude, zero pressure balloons. Each balloon is made up of 50 segments that are all heat fused together. These segments are almost 60 feet long, and since we need so many of them, we are making this machine to do the hard work of fusing them correctly for us. The goal size is roughly 4 feet by 60 feet. The difficulty I'm running into is with the extremely long 60 foot Y-axis.
Pictures of the work in progress are here:
https://drive.google.com/drive/folde...cw?usp=sharing
I am trying to make this machine as cheap as possible. Right now, I have it under $2500 all in (as long as I haven't forgotten anything major). The base is made in segments. Note the close up picture. The angle iron (red) is the bearing surface for the top and bottom bearings (yellow) as well as the horizontal bearing (black). This setup is mirrored on the other side of the base. The motor is not visible, but it consists of a 5/8" drive wheel off McMaster coupled directly to the stepper shaft and running on the angle iron. The segments bolt together and the individual pieces of angle iron come together to form one rail on each side.
The concern of my group mates and I is that the machine will jam if one side of the machine were to move faster than the other, or if we had issues with the tolerances of our base. The original design was a V-rail system so that the gantry could rise up on the V-rails if the separation of the rails were not perfect. However, our machine will be pressing down on the plastic to fuse it, so it might lift the drive wheels off the angle iron, leading me to create the current, more constrained design.
Any help is much appreciated. I know this forum loves a good challenge, I hope I brought one...