These are the parts machined to produce a 90:1 gear ratio with a 10 TPI worm and 90 tooth spur. These items form part of a rotary axis assembly used to position antennas for accurate EM pattern measurements. The spurs are made of delrin and the worm is a 10 TPI ACME threaded rod. The previous post shows how the spurs were cut.The axis are driven by 1.8 degree steppers drives which operate in 1/2 step mode making 400 steps per revolution. With the 90:1 ratio each degree is traversed with 100 steps. This is lots for the antenna positioner.
Nope this is not furniture making but it is a great setup exercise along the road to making gears for clock mechansi
