After thousands of hours of run time, we've learned a few things we'd like to improve on our AM1. When we added the pellet feed system, we increased the load on our gantry significantly and pushed the gantry framework to its limits. An upgrade was necessary, so we chose the beefiest gearbox we could get our hands on. With our new box, our AM1 can carry up to 60lb loads and move at a faster pace along the Z axis than ever before! Contact us for more information.