This is my 004 mapping station with different design for bigger rotating plate, 500mm. But the problem is stepper motor torque, rotating capability, with higher weight. I wanted to test out the torque. In market, this NEMA 17 has 260mN.m of holding torque and 12mN.m of detent torque. The weight of 160mm rotating plate was about 980g. Assuming that density of this acrylic is uniform, I calculated maximum 500mm would be fine to rotate.
It turned out that 500mm rotating plate with NEMA 17 did not work. It seems to rotate but it worked at first few second and stop due to weight of the plate. Therefore, for safety and material cost, I dealt with 300mm rotating plate which was fine for rotating.
This is the behind the scene of the rotating plate.
