Can't finish drivetrain?

[y-aji]

Thank you guys for your answers. Let me give just a little bit more information than was initially given, however, to possibly better explain what we have going on.

It appears to not be a chain length, nor is it a fastening problem. When setting the chains, they are so tight on one side that it bows the wheel inward on the offending side. The other side, using the exact circumference of chain, it is slightly loose. This is true no matter where one slides the gearbox.

I have counted the links, the teeth, and measured the circumference of the chain and found both sides to match each other within a measurable tolerance. However, even though all major variables regarding the chain and distance are the same, we are off by as much as a quarter of an inch when inserting the last screw. I would say it's a squaring issue, however, both the left side and the right side of the drive train have nice strong squares holding them in place.

The only real possibility I can find is that the height of the sprocket is off by 1/8 of an inch or something is wrong with the installation of the gearbox. Can you install a gearbox incorrectly or is it very much so built to prevent any kind of user failure.

The other major factor is, of course, that our robot has an opening in the front of it, we have resolved this temporarily. I'm not sure if the team has confirmed the problem persists from this point.