Thread subject: Homeroasters - Home Roasting Coffee Community :: Drum Roaster Advice and Discussion

Posted by baldheadracing on 10/31/2019 3:17 PM
#15

Quote

slaserj wrote:

Back with a motor question! As I posted first, I have a BIG stepper motor I plan on using for the drum, for extremely precise drum speed control. According to the torque curve here:

https://www.oyostepper.com/images/upload/File/34HS46-5004D_Torque_Curve.pdf

It has plenty of oomph. I have gears available for: 1:3, 1:2, 1:1, and their inverses. Has anyone used a stepper for a drum? It will be outside of the enclosure for heat isolation, and connected by a chain to the drum. Anyone see any red flags in this setup?

I don't know anything about motors, but with a chain drive, you will want to add some kind of a release mechanism like a clutch to prevent castastrophe if the drum jams. Depending on the size/weight of the drum, a belt drive might be a less complicated solution - the 1kg roaster in my avatar uses a generic v-belt.

Good luck!