0:00today we’re going to walk through
0:03setting up camera to use in lightburn
0:05doing the camera lens calibration in the
0:08camera alignment calibration
0:12so the first thing you’ll need to do is
0:13get a web camera usb-connected camera is
0:18the only type that lightburn directly
0:20supports you can get a an external
0:24application that will let you use IP
0:26based cameras we hope to support those
0:28in the future but we have you got that
0:30yet
0:31do be careful when selecting a camera go
0:34into our forums and do a search for
0:36cameras because there are some
0:38considerations for what type of camera
0:40to get depending on which OS you’re
0:42running as well as how you plan to mount
0:45it or where there’s a fair bit of
0:48information in the forums and we will be
0:50providing more on our site as well so
0:54once you have a camera setup connected I
0:57have mine mounted on the inside of my
1:00laser and I’ll show a picture of that
1:01here go to a window and enable the
1:06camera control window and you’ll see it
1:09here this is where it shows up by
1:11default even behind your cut list you
1:14can move this that’s fine if you click
1:17on camera here you should be able to
1:19find the camera that you’ve mounted mine
1:21is called lead to camera
1:23I’m going to pull this window out just
1:26to make this a little bit bigger so you
1:27can see it this camera view is actually
1:31live right now I can move my hand around
1:34underneath it so in order to get lightburn
1:40to take this picture which is
1:42fairly heavily fish-eyed and turn it
1:44into something useful we have to do
1:47what’s called lens calibration and
1:48alignment calibration and those are the
1:51two things we’re going to do next so
1:56go to tools pick calibrate camera lens
Transcript for The LightBurn Camera Setup (Cont…)
2:00and you’ll be presented with this window
2:02choose your camera and you should see
2:04the view here this page is where we do
2:09the lens calibration and you’ll see a
2:12link here that says click here to
2:13download the circle pattern image now
2:15what this is talking about is this this
2:19pattern is what lightburn uses to
2:22measure the distortion of the lens of
2:25the camera and so you can see as I get
2:27close to the sides here this warps a
2:30little bit it looks pretty good in the
2:32middle but on the edges you can see that
2:35the camera that I have right now is
2:36fairly heavily fish-eyed some are worse
2:39this is only a 140 degree lens a 160 170
2:44or 180 are considerably worse and
2:46they’re going to be harder to calibrate
2:48but it’s still possible with this card
2:52you print it out at the size that the
2:55image is originally so it works out to
2:58about a quarter of a standard sheet of
3:01letter paper I have this mounted on foam
3:05board which is just styrofoam with a
3:09paper core on either side or styrofoam
3:11core with paper on either side you want
3:13this to be as absolutely flat as you
3:16possibly can so I’ve just used glue
3:19stick to attach this to foam board the
3:24flatter this is the better your results
3:25if you have this image curved somewhat
3:29like this instead of being nice and flat
3:32like this
3:33the
3:35code in lightburn that is trying to
3:37compensate for the distortion of the
3:39lens and the camera will instead be
3:42compensating for the distortion of your
3:44paper and you don’t want that it’s going
3:46to affect your results so short version
3:48make sure that this is as flat as you
3:50can get it
3:51alright the next part is up here in this
3:55window you see this checkbox green check
3:59box showing you that you should make
Transcript for The LightBurn Camera Setup (Cont…)
4:01sure that the card is absolutely facing
4:04the camera not at an angle so what that
4:07means is you want this card to directly
4:09face the camera not be tilted slightly
4:11off to one side or the other tilted away
4:14you want it to directly face the camera
4:17and you want it to stay facing the
4:20camera as you move the image around so
4:23you don’t move the image in a circle
4:27like this around the camera you move the
4:31image like this relative to the camera
4:35so if the camera is over here looking
4:37this way I would move this card back and
4:40forth like this
4:43that’s important you want this card to
4:45point as flat at the camera as possible
4:48you can angle it a little bit if that
4:51helps and there are cases where it might
4:53but again as flat as possible is good so
4:57let’s get started
4:58so this little view here shows you the
5:02ideal position for the card for this
5:05particular calibration image that we’re
5:06taking you’re going to take nine
5:08captures maximum you can actually get
5:13away with doing fewer and we’ll talk
5:15about that when we get there this image
5:18is showing you which capture light Byrne
5:20wants you to take and basically what
5:21you’re doing is putting the card so that
5:23it occupies roughly one square of a
5:27tic-tac-toe board and you’re going to do
5:30all nine squares that make sense so hold
5:35the card as still as you can if you can
5:38rest it on something that’s even better
5:41fill approximately the space that it
5:45looks like it’s asking you for there and
5:47hit capture and you’ll see pattern found
5:51and a score now this score you should be
5:54trying to get it as low as you possibly
5:56can it is possible to get numbers that
Transcript for The LightBurn Camera Setup (Cont…)
6:00are point zero six point zero five it’s
6:05not easy but it’s doable and you’ll see
6:08you can recapture here there’s 0.12
6:11that’s actually pretty good
6:12if I tilt this funny hold it a little
6:15weird you see that number goes up quite
6:17a bit if it’s really crap and off the
6:21boundary here you’ll see hey I found the
6:24pattern but
6:25gives me a pretty bad score so hold it
6:29where it’s asking hold it as still as
6:31you can that one’s not bad lighting is
6:36also important and my lighting here is
6:38kind of crap and I apologize for that
6:41there we go so 0.13 that’s great so
6:44click Next
6:46now it’s saying bottom edge so we’re
6:50going to do basically the same thing
6:52that we did before hold the card nice
6:55and flat roughly the size that it looks
6:58in that picture and you capture 0.23 is
7:03actually not a bad score I’m going to
7:06try and get it a little lower
7:13you can also move the image around a
7:16little bit with in the frame sometimes
7:18that helps point one six I’m pretty
7:21happy with that so we’ll click Next this
7:24one
7:24don’t let the image fool you the picture
7:28in this is quite distorted because this
7:31sample image was from a hundred and
7:34sixty or a hundred and seventy degree
7:36lens but really what like bird is asking
7:38for is this picture over here
7:48it’s not bad I think we can do better
Transcript for The LightBurn Camera Setup (Cont…)
8:02I’m reasonably happy with that
8:05we move on to the next one on the next
8:07side lighting over here is a little
8:09better so this one might improve
8:14that’s pretty good
8:20when you take your first capture you
8:23might have noticed that when I did it
8:24the image here looked really weird and
8:27round and warped don’t worry about it it
8:30corrects as you go so this one up here
8:40that’s a great score so I’m happy with
8:42that now because I have done well and
8:46gotten good scores for the captures up
8:48to this point for the center the bottom
8:51and top and the two sides I have the
8:53option to skip the four corners because
8:56my captures have been really good so I
8:59can either click the skip button or I
9:02can go through and capture images for
9:04these ones as well I’m gonna do at least
9:07one point to one that’s a good one click
9:12Next it’s also worth noting that Lake
9:16Burton doesn’t check which picture you
9:20gave it so I just did the corner down
9:22here I’m gonna skip this one and go to
9:23the next one over here and you’ll notice
9:28it’s asking me for this bottom corner
9:30I’m just gonna do this one up here
9:32that’s great I can click next and I’m
9:36going to skip the next two so we’ve done
9:40the camera lens calibration and now the
9:43next step is the camera alignment now
9:47for that
9:48you need a piece of material I have a
9:52fairly crappy piece of wood that I’ve
9:57placed in my machine roughly centered in
9:59the view of the camera if you have a
Transcript for The LightBurn Camera Setup (Cont…)
10:02large bed try to get a piece of material
10:06that is large enough to cover a fairly
10:09wide area the default for this test
10:13pattern cut is as you’ll see here 200
10:17millimeter square or an 8 inch square
10:18that’s great if you have a little k40 or
10:22something like that but if you have a
10:24large machine you should use the scale
10:27factor here to scale this image up to
10:30fill more of your bed because it’ll give
10:33you better accuracy it will give you a
10:34much better result so I am going to bump
10:40this up to 200
10:44if you have a material or sorry a
10:48moveable Z you may want to set the
10:51material thickness this will shift the
10:53bed a little bit most of the time you
10:55don’t need to do this choose an
10:58appropriate speed and power for the
11:02machine that you’re using this is going
11:04to do essentially a surface engraving
11:07and so I want to use a fairly low power
11:11and a relatively high speed because I
11:14have a 100 watt co2 machine your numbers
11:18will be different than mine I’m also
11:21going to enable air assist when you have
11:26a scale that you think is appropriate
11:29for your machine hit the frame button
11:31and lightburn will run a frame around
11:34the job use that to make sure that your
11:38material is lined up properly in my case
11:42this material or this piece of wood that
11:45I’ve got is actually a little bit small
11:47so I’m going to try a hundred and eighty
11:50and frame that again
11:53looks like I’m actually going to need to
11:56go to 170
Transcript for The LightBurn Camera Setup (Cont…)
12:04and I think that’s about perfect so once
12:08you have lined up the material on the
12:12bed and picked the size that’s
12:15appropriate go ahead and cut it
12:22so make sure that the power and speed
12:26that you choose is appropriate for your
12:28machine and gives you a relatively dark
12:32surface marking you’re going to be
12:35trying to find these targets that it’s
12:38cutting out in the camera view and so
12:42you want to make sure that it’s well lit
12:44and that you can see them
12:46so that you can do the next step
12:47properly
12:56so once you’ve done your cut and you’re
12:58happy with the results
12:59be very careful do not move either the
13:03camera or the targets from this point on
13:05your camera should be mounted to the
13:09laser in such a way that the position
13:11when you are using the camera for bed
13:14capture is always in the same place if
13:17your lid wobbles or doesn’t have hard
13:20stops that may be a problem it will
13:23cause your camera position to shift
13:25slightly and that’s going to affect the
13:27accuracy of your results so do be aware
13:29of that I’m happy with the output here
13:33so I click Next now you can see a crappy
13:37picture of the bed here if you need to
13:39move the head of your laser out of the
13:42way for example so if mine finished here
13:46that’s going to make it difficult for me
13:48to mark the targets so you can use these
13:50buttons to jog or move your laser to one
13:53of the corners when you’re happy with
13:56the image that you see here click
13:58capture and you’ll see a preview of it
Transcript for The LightBurn Camera Setup (Cont…)
14:01over here I’m happy with this I’ll click
14:04Next so now I’m going to use this view
14:08to mark these targets and you can see
14:11that they are numbered the lighting here
14:15is a little terrible I may need to do
14:18this again
14:41that’s much better
14:46so what you’re doing in this view is
14:50just like the preview and lightburn you
14:52can use the click to drag or mouse wheel
14:55to zoom in and out you want to mark
14:58these targets with a little crosshair so
15:02you’re telling lightburn where each of
15:06these marks is in the camera view in
15:09numbered order so be as accurate as you
15:13can be you want to hit dead center and
15:15as close to dead center as you
15:17absolutely can on each of these marks
15:18and you can zoom out to check so that
15:22one’s good and again be careful and take
15:27your time because the more accurate you
15:28do this the better your results are
15:30going to be when you are trying to use
15:34the camera
15:36if you need to reposition a mark if
15:40you’re close to it already double
15:42clicking near it will move that mark and
15:46if you really mess up you can just click
15:49undo last and it will remove the mark
15:51completely
15:59think those are about as good as I’m
Transcript for The LightBurn Camera Setup (Cont…)
16:01going to get
16:04one just touch
16:08when you’re happy with your four marks
16:10click Next and click finish
16:14if you go back now to the camera control
16:16view so I have done the lens calibration
16:21I’ve done the camera alignment if I
16:24click update overlay I now see an image
16:28from the camera projected onto the
16:32backdrop of my page here and these marks
16:37are accurate or should be if I click the
16:41click to jog and zoom in here to a
16:43marker number one and move my laser head
16:47to there you can see in this view the
16:50laser moved to that marker if I look at
16:55my laser right now or take a picture of
16:58it the laser head is exactly in the
17:02center of that mark so if I click show
17:06last position
17:10to move this too
17:12right
17:14okay that’s as close as it’s going to
17:16get just because I’ve told it to snap
17:18two millimeters I am going to take a
17:22picture of this right now to show you
17:23where my laser is pointing
17:32so you’ll be able to see it
17:36again if I click one of the other
17:39targets like number three
17:47it’s basically perfect so that’s good
17:50so what do you use it for the short
17:56answer is you use this to line up work
17:58on your machine so if I have an odd
Transcript for The LightBurn Camera Setup (Cont…)
18:03shaped piece of material like I do here
18:06for example and I want to do a cut that
18:11matches this very very precisely I’m
18:15going to try to put a circle or an arc
18:21right here around this so I’m going to
18:26put a point here I’m going to put a
18:28point
18:29[Music]
18:32I have this turn off that’s why they’re
18:34not showing up
18:40so I’m going to
18:43go into edit mode
18:46point
18:51try to make this fit nice close to this
18:54circle
18:57this
19:04all right so it’s not beautiful but
19:07it’ll get the point across basically
19:09what I’m going to try to do is cut a
19:13line right on the outside edge of that
19:16just to demonstrate how close you can
19:20get with this
19:22so I’m going to run this
19:25[Music]
19:31and you’re going to take a picture so I
19:34can show you where that ended up
19:37and I’m also going to go back to the
19:41camera control view
19:44jog my laser head out of the way and
19:49click update overlay
19:53turn my light off again because that’s
19:55too bright there we go
19:59if I go back to my cut list
Transcript for The LightBurn Camera Setup (Cont…)
20:02and hide this you can actually see that
20:07line right there it’s a little bit out
20:10of focus but that is that line and if I
20:14turn it back on that’s how close we are
20:24so the accuracy is honestly very good
20:31if I toggle it off and on you can
20:32actually see this line here
20:39and the line in lightburn that matches
20:42it the camera image is actually a little
20:44bit blurrier but in real life it’s very
20:48very close so you could use this to
20:53place anything on the bed of the bed of
20:56the laser and perform a cut so as an
21:02example if I wanted to outline this one
21:06with a box if I draw a box around it
21:10just like this
21:16tell it to cut
21:19make sure that I have removed other line
21:22here
21:25close my lid and click start I’m going
21:33to hide that and
21:36[Music]
21:38and if I update the overlay you can
21:41actually see the box that I just cut is
21:44right there and the one in lightburn is
21:49right on top of it
21:52and so this opens up the ability to cut
21:56or mark irregular items strange shapes
21:59fit cuts on to oddly shaped materials
Transcript for The LightBurn Camera Setup (Cont…)
22:03like this and so on and that is the
22:06entire point of using a camera with
22:08Leiper
22:09thanks for watching I hope you learned
22:11something
