Filling machine for powders

Projects General Guidance
1

Hello

I want to create a filling machine for powders (different powders).
My idea was to do the following:

-Having a rotating plate with containers through it.
-rotating plate rotates the right container over a funnel.
-Some sort of valve opens, product starts falling in funnel.
-Product falls through the tunnel in a jar that is on a scale.
-When the right amount is reached, valve closes itself.
-The rotating plate of the jars rotates to next jar.
-Rotating plate of the upper containers rotates to desired product.

-Desired products + amounts are read from an sdcard or something, like:
Product1, 50 grams
Product3, 78 grams
Product7, 32 grams
Product2, 12 grams

I try to draw a picture about what I want to make, see attachment.

I think the rotating plates and the scale are no problem, but I have no idea about a valve. Maybe a valve that slides a whole open and close would be better. But I have no idea if something like that exists.

Problem is that I need a valve for every container in the upper rotating plate.

Any ideas, suggestions or critics?

arduino.jpg
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2

use a rc servo arm to open and close a port like a windshield wiper

may need to use something like an auger or vibrator to ensure the powder flows and does not get stuck

maybe a combo, like a servo arm to open the port, then a vibrator on the plate that shakes, either to dispense the powder or in case the arduino detects that no powder is flowing

3

if you have different size holes on the rotating plate, each could hold "X" volume.

using 2 of one size and 3 of another could deliver a specific volume.

in this method, you would has a slide over the rotating plate under the hopper.
the slide wold be like a sliding damper. and it would just push in and out. easy enough with a servo.

move a hole under the damper, fill the chamber, close the damper
rotate so the hole is over the funnel and it will dump the load.

there are a few threads of people doing this sort of thing with gunpowder for automatic scales. might find what others have done with some searching.

they will also use a trickler to drop tiny amounts on the scale to get an exact value.