Calculate appropriate feeds and speeds

00:02

calculate appropriate feeds and speeds.

00:06

After completing this video, you'll be able to

00:09

calculate appropriate feed rate and tool speed.

00:15

The speed at which a tool moves and turns on a machine is going to be critical for not

00:20

only the amount of time it takes the machine

00:22

apart but the quality and accuracy of the part.

00:26

There are many different formulas that you can use.

00:28

But let's take a quick look at just one of them.

00:31

In this case the rpm or revolutions per minute that the tool

00:35

is spinning is equal to 12 times the surface feet per minute,

00:40

divided by 3.14 times the diameter of our tool.

00:44

We can also see that by swapping out 1000 times surface meters per minute.

00:48

We can use these in metric applications.

00:51

So let's take a look at solving the following surface feet per minute.

00:56

Given that we wanted to spin the tool at 1000

00:58

rpm and we have a quarter inch diameter tool.

01:02

So that 1000 is going to equal 12 times the sfm or surface

01:07

feet per minute divided by 3.14 times the quarter inch tool diameter.

01:13

So this gives us an amount of 0.785,

01:16

which if we re factor our equation is 1000

01:20

times 10000.785 is equal to 12 times our sfm.

01:24

So by factoring this out, we have 785 divided by 12 is equal to R. S. F. M.

01:32

This gives us an sFm or surface feet per minute of 65.4 for any given tool,

01:39

we can figure out how fast the tool needs to go.

01:41

Given a handful of parameters.

01:44

Infusion 3 60.

01:45

There are different parameters that we can

01:46

fill in based on tool manufacturer specifications.

01:50

You won't always have a specific rpm,

01:53

a surface feet per minute or other parameters that go along with your tool.

01:58

In some cases, you'll need to use the tool manufacturers,

02:00

recommendations and adjust up or down based on

02:03

how the tool is performing at the machine.

02:06

In this case, we're looking at a simple example for this formula,

02:10

but make sure that you do explore different formulas

02:13

and different tool parameters that can be used as

02:16

those will be important in figuring out how fast

02:18

your tools should spin or move through your material.