Conveyor speed

dave dempsey · Dec 4, 2015

I need help to figure out my belt speed on a conveyor in fpm can anyone help?

Steve Bailey · Dec 4, 2015

Its a pretty simple calculation but you have to tell us what measurement you are making and the details of everything between what you are measuring and the surface of the belt.

DeKemp · Dec 4, 2015

If you know the rpm of the drive wheel and the diameter of it you can calculate the speed. Maybe there are easier methods, but i never work with converyors.

dave dempsey · Dec 4, 2015

Motor rpm. 1750
Drive pulley dia 4.5"
Driven pulley dia 22.5"
Gearbox ratio. 40:1
Drive sprocket. 15 teeth
Driven sprocket. 60 teeth
Head pulley dia. 30"

DeKemp · Dec 4, 2015

First thing is to figure out what the actual rpm of the drive wheel would be. Then the circumference because that will determine how much the belt will move in 1 turn (providing optimal transfer). and then calculate

Example, using metric here.
driving wheel, 10rpm
driving wheel circ, 0,5m
0,5*10=5m/min
5/60=0.08333m/s

Aabeck · Dec 4, 2015

[driven pulley dia] / [drive pulley dia]
Divide motor RPM by above result
Divide result by 40 (gearbox), save result
[driven sprocket teeth] / [drive sprocket teeth]
Divide saved result by sprocket result
This gives you the RPM of the head pulley
[head pulley dia] * pi (3.1415926) = travel per revolution (inches)
[travel per revolution (inches)] / 12 = feet travelled per revolution
RPM * feet travelled per revolution = feet per minute of belt driven by head pulley

Steve Bailey · Dec 4, 2015

If I'm interpreting correctly, you have a motor at 1750 RPM driving the input of the gearbox through a 4.5"/22.5" belt reduction.
The output shaft of the 40:1 gearbox drives the 30" diameter conveyor pulley through a 15/60 chain or timing belt reduction.
The input speed of the gearbox is 1750 * 4.5 / 22.5 or 350 RPM
The output speed of the gearbox is 8.75 RPM
The conveyor pulley speed is 8.75 * 20 / 60 or 2.91 RPM

The conveyor pulley is 30" (2.5 feet) in diameter and 2.5 * PI or 7.85 feet in circumference.

The surface speed of the conveyor pulley is 2.91 (Revolutions per minute) times 7.85 (feet per revolution) or 22.9 feet per minute.

dave dempsey · Dec 4, 2015

How did u get output speed of gearbox?

Steve Bailey · Dec 4, 2015

I divided the input speed by 40 (the gearbox ratio).

dave dempsey · Dec 4, 2015

Conveyor pulley speed should be
8.75 x (15/60) ?

Steve Bailey · Dec 4, 2015

You're right. My mistake.
Makes the surface speed of the conveyor 17.17 FPM.

dave dempsey · Dec 4, 2015

Thank you!!

dave dempsey · Dec 4, 2015

I'm coming up with a different result than guy below you aabeck

Nevermind I'm an idiot. Thanks guys I appreciate everything!!

JRW · Dec 5, 2015

After you do the math then walk out and put a handheld tachometer on it

rdrast · Dec 7, 2015

JRW said:
After you do the math then walk out and put a handheld tachometer on it

This.

All of the above calculations miss the thickness of the belt.

Just measure it, and scale accordingly.

Conveyor speed

dave dempsey

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Steve Bailey

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DeKemp

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Steve Bailey

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dave dempsey

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Steve Bailey

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dave dempsey

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