[stewi]

I like to share some insights on a multiple nozzle revolver head.
This is just a drawing and I have no intention to build this. However, I will assist whoever wants to build one.

Starting with a 5 mm thick plate, which is covered with another 1 mm plate I attached a disc stepper to it.
At the front side I have a circular track with two openings. At the lower opening the head segment will exit here for Z-motion, to the right the head segment will engage with a stepper motor for nozzle rotation.

The plate is milled out with two paths, one for vacuum (air/kiss) in the lower pick position, one larger one for the rest of the nozzles.
I've designed an eight nozzle head, but any other number is feasible.

The lower hole for vacuum has a 3 mm opening, all other 2mm.
At the end of the path, I will attach vacuum generators. Likely one for pick and place and 3 for the other.

The wheel hub is two parted. The longer one is attached to the motor shaft and the "star wheel", the shorter containing 8 3mm tubing will slightly press on the plate via spring tension.

I've tapered all holes in the Nylon or Teflon wheel, in order to assure the vacuum will not drop, when the wheel turns.