# No-slip belt drive, neglect belt stretch
driverDiameter = 50 mm in 20..100
drivenDiameter = 100 mm in 40..200
driverSpeed = 1200 rpm in 200..3000
ratio := drivenDiameter / driverDiameter
drivenSpeed := driverSpeed / ratio [rpm]
check driven speed: drivenSpeed <= 1000 rpm
scenario large pulley: drivenDiameter = 150 mm