Re: 3D printer fun with powder

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> I've got a little further, I have two powder bins with stepper motors
> to adjust the height working fine. I also have a counter roller for
> powder spreading. However I've met a small hick up when the little
> motor I selected to spin the counter roller spun it at such a speed
> that the aire picked up on its surface was enough to throw the powder
> backwards. I've confirmed with my electric screwdriver that lower
> speeds work fine so just need to get a suitable motor with gearbox.
> FWIW the electric screwdriver was spinning at about 120-150rpm.
>
> Graham
>