& Construction
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Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
& Manufacturing
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Professional CAD/CAM tools built on Inventor and AutoCAD
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.
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: