- #1
DIYSer
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I would like to make an electric motor powered soil sifter for sifting soil/compost, but I'm a bit stumped at the moment. I'd like to use an inexpensive single phase AC motor from a an old vacuum cleaner or a clothes dryer, but I don't know how to determine what size electric motor I would need for my application.
Basically, the motor has to have enough torque to move a wire cloth screen fast enough below a maximum 20 lb load of soil to shake/scrape the soil into bits so it will easily fall through the screen.
I've included a few details below to hopefully help whoever can help me to determine what size motor would be right for my application:
Motor:
Motor HP: ?
Motor torque: ? (is full-load torque what I should be calulating? How to compute how much is required?)
Drive:
motor (drive) pulley ": 1
driven pulley ": 8 (a plate & drive pin/rod will be attached to this pulley)
belt: A style belt
Sifter:
inside frame dims: (1.5"H x 24"L x 18"W)
wire cloth: 1/4" square openings
Wt: 2 lbs
Load:
wt: 20 lbs
material: soil/compost
sift rate/second: 2.2 (driven pulley rpm=132)
I did some HP & torque formula calculations to determine what size motor I thought I might need for my application, but I am not really confident about my numbers. I don't want to use too small of a motor and discover it doesn't work properly or too large of a motor and waste electricity unnecessarily.
Can anyone let me know how to solve these questions?
Thanks in advance for any help you are willing to provide.
Basically, the motor has to have enough torque to move a wire cloth screen fast enough below a maximum 20 lb load of soil to shake/scrape the soil into bits so it will easily fall through the screen.
I've included a few details below to hopefully help whoever can help me to determine what size motor would be right for my application:
Motor:
Motor HP: ?
Motor torque: ? (is full-load torque what I should be calulating? How to compute how much is required?)
Drive:
motor (drive) pulley ": 1
driven pulley ": 8 (a plate & drive pin/rod will be attached to this pulley)
belt: A style belt
Sifter:
inside frame dims: (1.5"H x 24"L x 18"W)
wire cloth: 1/4" square openings
Wt: 2 lbs
Load:
wt: 20 lbs
material: soil/compost
sift rate/second: 2.2 (driven pulley rpm=132)
I did some HP & torque formula calculations to determine what size motor I thought I might need for my application, but I am not really confident about my numbers. I don't want to use too small of a motor and discover it doesn't work properly or too large of a motor and waste electricity unnecessarily.
Can anyone let me know how to solve these questions?
Thanks in advance for any help you are willing to provide.