For the past several years we've used normal T-slot 80/20 to build a prototype/practice robot and then used 80/20
Quickframe to build the competition robot. Using normal 80/20 for the prototype lets us make changes very quickly but it's often too heavy for the final robot...it depends on the challenge. Quickframe is about half the weight.
Quick frame nylon connectors like the
9250 have always worked well for us at the corners but we've never trusted the
9240 when we need to connect a vertical member mid-span. instead we've ended up making our own aluminum L brackets. This is a tedious process.
Has anyone come up with a better (faster) way of joining a horizontal 1" square aluminum extrusion to a vertical member mid span? (Besides welding...we don't have the facilities for that and don't want to send it out since we pride ourselves on being 100% student built).