Leadshine EM806 - Am I using them properly?

[Chaz]

That would be 2:1 with 2 turns in gives 1 turn out

As written it sort of looks like a gearing up but that is the convention for gearing down to get less speed but more torque.

Yep, counted the pulleys, 18 tooth on one, 36 on the other. So making the larger one bigger will give me more torque. Just need to look at space and belt options (assuming there is no problem elsewhere and the drive is working as well as possible).