Post #1873743
2026-02-02 06:43 UTC
@PatrickHerd @gigabecquerel
As far as I understand, it's "just" a matter of spraying on charge on the cold end, and then collecting the charge on the hot end? Thereby more charge per same belt speed equals more current?
What are the design constraints for the top roller? Metal/plastic, floating or connected to the HV terminal?
Just found out that my local home improvement store sells pvc tablecloth, it's literally screaming "turn me into a VDG belt"
Replies (2)
-
@gigabecquerel@chaos.social 2026-02-02 09:36
@ozon @PatrickHerd Yes, the function of the bottom brush is just to get charge onto the belt, and the top brush to get it off of the belt again. The issue is, that there are many different topologies and I can't really make sense of them. Here's the arguing I've heard so far: If you have a brush at high voltage located at the lower roller it can spray charge onto the belt, but due to the belt touching the roller there might be a mirror charge building up on the pulley side of the belt.
-
@gigabecquerel@chaos.social 2026-02-02 10:20
@PatrickHerd @ozon Also, regarding the belt material: I'm currently looking at "LKW Planenen" (Truck bed covers?) for that. Very robust, PVC coated polyester. Water tight and UV resistant!