Fastest Pellet Sorter in the Works

[Raider03]

For those who know nothing about how to build something like this but find it extremely interesting (like me ) a tutorial:

Arduino with Load Cell and HX711 Amplifier (Digital Scale) | Random Nerd Tutorials

Create a digital scale with the Arduino using a load cell and the HX711 amplifier. First, you'll learn how to wire the load cell and the HX711 amplifier to the Arduino to build a scale.

randomnerdtutorials.com

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Mlc608l High Accuracy 1mg Accuracy Electronic Balance Scale Micro Weight Sensor Load Cell 20g - Buy Micro Load Cell micro Weight Sensor load Cell 20g jewelry Scale Load Cell jewelry Scale Weight Sensor 1mg Accuracy Load Cell Product on Alibaba.com

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[MartinT]

That machine is so great, awesome make!

 

[bigHUN]

Oh nooo, arduino again.
This is a forth time in last ten plus years I need to re-learn the programming for a single task. Takes time to refresh and fades out quickly.
Last project was the FX radar display during the vaccine time.

 

[RScott]

I can make an auto-feeder if needed but head sizing is out of my league ATM. AFAIK head sizing would involve some swaging and is beyond the scope of this machine. Maybe in the future?

I think the poster was asking about head size measurement and sorting, as the Pelletgage is used for. I would love one of your devices for weighing (if it can reliably differentiate pellets withing 0.1 grain of each other), but weighing is much faster than determining which head size hole a pellet fits through on a Pelletgage. So if you could also come up with an automated pellet head size sorter, you'll have a few thousand benchrest and field target shooters begging for your devices.

Even with "just" automated pellet weight sorting, you have a great invention!!

 

[Kabayan]

I think the poster was asking about head size measurement and sorting, as the Pelletgage is used for. I would love one of your devices for weighing (if it can reliably differentiate pellets withing 0.1 grain of each other), but weighing is much faster than determining which head size hole a pellet fits through on a Pelletgage. So if you could also come up with an automated pellet head size sorter, you'll have a few thousand benchrest and field target shooters begging for your devices.

Even with "just" automated pellet weight sorting, you have a great invention!!

I am still struggling with "noise" at the moment, despite having a low noise amplifier installed.

The problem is really this: I am trying to get better than 0.01 grain resolution from a load cell with 1,543 grains full-scale rating, when weighing a pellet that's only 20 grains in weight. It's not gonna happen because I am just slightly above the noise floor with that pellet. I need better resolution.

To get the resolution I need, I will install a more sensitive load cell, one with 30 grains full-scale rating. This is on order and will take a few weeks to get here. I will post results as soon as I try it out.

Thanks for the heads-up on the Pelletgage. Now I understand what the requirement is: How to automate the measurement of a pellet's head diameter. An Optical Comparator can do the job but that piece of hardware is VERY EXPENSIVE. Plus the automation of singulation and the subsequent sorting.......let's stick to weight measurement for now. (BTW, swaging each pellet to size is far more easier to do than mechanical sorting using a gauge)