Run CNC program

00:01

Run CNC program. After completing this video,

00:05

you will be able to more confidently run apart.

00:08

Recognize how our speeds and feeds affect our part surface finish

00:13

and better recognize how sound is an indicator of machining health.

00:18

Let's make some chips.

00:20

Now, we've already dry,

00:21

run everything and made sure that everything is going to clear

00:24

so we can just reduce our rapids

00:27

and press a cycle start button.

00:30

I'm gonna feed, hold each tool just above the part

00:33

and make sure that our distance to go and program work positions look reasonable.

00:38

Now, our program position says that we are

00:41

Z 0.2 inches above our part and visually that looks reasonable.

00:45

The tool is coming in centered above the part just like we'd expect.

00:49

So we will let things run

00:51

and come back and talk about what we've seen

00:53

and heard after

01:18

nice,

01:19

our first part together

01:21

or at least the first operation on our first

01:23

part together and things are looking pretty good.

01:26

Now, let's talk surface finish.

01:29

If there were vertical lines

01:32

left by our end mill,

01:33

then we may have been feeding our tool too fast during our finishing passes.

01:39

This machine has a 12,000 R PM spindle. But we ran the tools

01:43

at only 8100. So we could have run things faster.

01:48

If we wanted a better finish, we could increase our R PM.

01:52

The tool will be taking smaller bites of

01:54

aluminum but more hopping giving us a smoother finish

01:57

or for a better finish. Without increasing our spindle R PM,

02:02

we can reduce our feed rate.

02:04

This will also decrease the amount of material the tool takes

02:08

with each revolution, smoothing things out.

02:11

Now, while our part was running, we could have adjusted our feed rate,

02:15

overrides or our spindle overrides,

02:17

we can adjust our, our R PM up or down and our feed rates up or down

02:22

depending on how the machine was sounding at that moment

02:25

or how our parts looked after the fact.

02:28

Uh you can record those overrides and then make

02:31

adjustments to your program in fusion 360 later.

02:34

Now we program this part

02:35

to finish at 80 inches per minute,

02:38

which is kind of a middle of the road feed rate for the R PM that we were playing with.

02:42

If we had finished this part at 300 inches per minute,

02:45

we definitely would have ended up with

02:47

lines on our part which don't look that great. So

02:52

we chose a slower feed rate.

02:55

Listen to this,

02:57

this is too aggressive

03:03

and this,

03:08

this is good

03:12

over time. You will gain an appreciation of what a good cut sounds like

03:17

if feed rate changes are necessary. You can open up the cam file in fusion 360

03:22

adjust those feeds and speeds. Feeds.

03:25

Are your inches per minute, millimeters per minute

03:27

speeds. Are your revolutions per minute? How fast the tool spins?

03:31

And we can repost the program.

03:33

Our

03:33

OD looks pretty good.

03:35

Our ID looks good and our champer looks great.

03:38

The top of our part, that top surface looks fantastic.

03:42

Meaning that it's been cleaned up completely, fully machined.

03:45

We don't want the raw stock left showing.

03:48

That's an adjustment we might have to make at some point in the future.

03:51

We'll talk about that in other videos.

03:53

Another thing that can affect our surface finishes is definitely

03:57

our coolant and we've made lots of videos on that.

03:60

But if our coolant concentration is too low,

04:02

we're gonna have finish problems.

04:04

If our coolant nozzles are not aimed right at our

04:08

tools that it's gonna cause us surface finish problems.

04:11

But on this guy, I, I think we did a pretty good job so we can,

04:14

we can pat ourselves on the back.

04:16

Now, with each part we run, we're gonna gain experience,

04:20

we're gonna learn what a good part looks like and sounds like. So go make some chips.

Video transcript

00:01

Run CNC program. After completing this video,

00:05

you will be able to more confidently run apart.

00:08

Recognize how our speeds and feeds affect our part surface finish

00:13

and better recognize how sound is an indicator of machining health.

00:18

Let's make some chips.

00:20

Now, we've already dry,

00:21

run everything and made sure that everything is going to clear

00:24

so we can just reduce our rapids

00:27

and press a cycle start button.

00:30

I'm gonna feed, hold each tool just above the part

00:33

and make sure that our distance to go and program work positions look reasonable.

00:38

Now, our program position says that we are

00:41

Z 0.2 inches above our part and visually that looks reasonable.

00:45

The tool is coming in centered above the part just like we'd expect.

00:49

So we will let things run

00:51

and come back and talk about what we've seen

00:53

and heard after

01:18

nice,

01:19

our first part together

01:21

or at least the first operation on our first

01:23

part together and things are looking pretty good.

01:26

Now, let's talk surface finish.

01:29

If there were vertical lines

01:32

left by our end mill,

01:33

then we may have been feeding our tool too fast during our finishing passes.

01:39

This machine has a 12,000 R PM spindle. But we ran the tools

01:43

at only 8100. So we could have run things faster.

01:48

If we wanted a better finish, we could increase our R PM.

01:52

The tool will be taking smaller bites of

01:54

aluminum but more hopping giving us a smoother finish

01:57

or for a better finish. Without increasing our spindle R PM,

02:02

we can reduce our feed rate.

02:04

This will also decrease the amount of material the tool takes

02:08

with each revolution, smoothing things out.

02:11

Now, while our part was running, we could have adjusted our feed rate,

02:15

overrides or our spindle overrides,

02:17

we can adjust our, our R PM up or down and our feed rates up or down

02:22

depending on how the machine was sounding at that moment

02:25

or how our parts looked after the fact.

02:28

Uh you can record those overrides and then make

02:31

adjustments to your program in fusion 360 later.

02:34

Now we program this part

02:35

to finish at 80 inches per minute,

02:38

which is kind of a middle of the road feed rate for the R PM that we were playing with.

02:42

If we had finished this part at 300 inches per minute,

02:45

we definitely would have ended up with

02:47

lines on our part which don't look that great. So

02:52

we chose a slower feed rate.

02:55

Listen to this,

02:57

this is too aggressive

03:03

and this,

03:08

this is good

03:12

over time. You will gain an appreciation of what a good cut sounds like

03:17

if feed rate changes are necessary. You can open up the cam file in fusion 360

03:22

adjust those feeds and speeds. Feeds.

03:25

Are your inches per minute, millimeters per minute

03:27

speeds. Are your revolutions per minute? How fast the tool spins?

03:31

And we can repost the program.

03:33

Our

03:33

OD looks pretty good.

03:35

Our ID looks good and our champer looks great.

03:38

The top of our part, that top surface looks fantastic.

03:42

Meaning that it's been cleaned up completely, fully machined.

03:45

We don't want the raw stock left showing.

03:48

That's an adjustment we might have to make at some point in the future.

03:51

We'll talk about that in other videos.

03:53

Another thing that can affect our surface finishes is definitely

03:57

our coolant and we've made lots of videos on that.

03:60

But if our coolant concentration is too low,

04:02

we're gonna have finish problems.

04:04

If our coolant nozzles are not aimed right at our

04:08

tools that it's gonna cause us surface finish problems.

04:11

But on this guy, I, I think we did a pretty good job so we can,

04:14

we can pat ourselves on the back.

04:16

Now, with each part we run, we're gonna gain experience,

04:20

we're gonna learn what a good part looks like and sounds like. So go make some chips.

After completing this video, you’ll be able to:

  • More confidently run a part.
  • Recognize how Speeds and Feeds affect surface finish.
  • Better recognize how sounds is an indicator of machine health.

Video quiz

When we press “Feed Hold” button on tool entry move, what do we want to check to ensure everything looks good?

(Select one)
Select an answer

1/1 questions left unanswered

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