A few months back, I wrote about how I used a 3D printer to transform any mp3 into a physical record.  Though all the documentation for that project is available here, and the 3D models could potentially be printed through an online fabrication service, I knew that the barrier to entry for normal people interested in trying out the process themselves was prohibitively high.  With this project I wanted to try to extend the idea of digitally fabricated records to use relatively common and affordable machines and materials so that (hopefully) more people can participate, experiment, and actually use all this documentation I've been writing.

These records were cut on an Epilog 120 Watt Legend EXT to a theoretical precision of 1200dpi (the kerf of the cut and some tricks I used to avoid crashing the laser cutter dropped the actual precision down by ~1/6).  The audio on the records has a bit depth between 4-5 (typical mp3 audio is 16 bit) and a sampling rate up to about 4.5kHz (mp3 is 44.1kHz).  So far I've successfully cut audio on wood (figs 1-2), acrylic (figs 3-4), and paper (figs 5-6), and I'm sure there are many more materials that would work.  I wrote the Processing sketch that generates the record cutting paths so that it can be modified for any song, material, cutting machine, record size, and turntable speed (skip ahead to download the code and learn how to make your own records).

You should also note that in this Instructable I'll demonstrate specifically how I used a laser cutter for this process, but the cutting files I'm using are standard vector graphics in a PDF format, so they can be extended to many other digital fabrication tools. For example, I'm curious to see if it's possible to use a CNC mill or a CNC razor blade paper cutter with my cutting files (a group of people were able to cut out some sine waves on paper using a Cameo in this Instructable).

Below are some of my final results, read on to see how they were made and how you can make your own.

Joy Division - Love Will Tear Us Apart on clear acrylic (download vector files):

Radiohead - Idioteque on wood (download vector files):

The Velvet Underground and Nico - Femme Fatale on maple (download vector files):

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Step 1: How Does a Record Work?

Picture of How Does a Record Work?
I've explained a bit about how a record works and the scale of vinyl microgrooves in my 3d printed record project.  The main difference between these laser cut records and my 3d printed records is the axis that the grooves are cut on.  Since I can't control the power of the laser while it is cutting a vector path, the laser cut records are cut laterally on the surface of the material.  This means that the needle only vibrates in the plane parallel to platter of the turntable.  The 3d printed records are "cut" vertically, meaning the needle vibrates in the plane perpendicular to the platter.  I chose to modulate the grooves vertically for the 3d printed records because the vertical axis is the most precise axis on the machine (resolution of 16 microns).

Stereo (2 channel) vinyl records are cut both vertically and laterally, this way it's possible for two isolated channels of audio to fit into one groove.  Mono vinyls are cut laterally only, this is because the vertical cuts can become distorted, especially if you try to increase the amplitude of your waveform to increase the dynamic range of the sound.  Although I didn't really have a choice in the matter, it's better to to cut a mono groove laterally.

To give you an idea of the size of the grooves on a modern record, check out the image above from Chris Supranowitz, a researcher at The Institute of Optics at the University of Rochester.  This is a close up image of a vinyl record, taken with an electron microscope.  The dark objects in the grooves are tiny particles of dust.  The laser cutter cannot make such precise cuts because the width of the beam is too large, so the grooves on my records are about 1-2 orders of magnitude larger in every dimension than these grooves.

Step 2: Laser Cutter Specs

Picture of Laser Cutter Specs
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The lasers in our office are Epilog 120 Watt Legend 36EXT.  They have a 36"x24" cutting bed, big enough to cut several 12" records at a time.  They have a max resolution of 1200dpi in the x and y axes and 100 power and speed settings to control cutting depth.

Before I started cutting anything, I used these numbers to calculate the resolution I'd be able to achieve.  First I wanted to make sure that I would be able to get a good sampling rate on my audio.  Sampling rate is the amount of samples per second in a song.  Usually the sampling rate is 44.1kHz (or 44,100 samples a second).  When the sampling rate drops below about 40kHz the higher frequencies of a song start losing their detail, but depending on the song you can go down to 20 or even 10kHz sampling rate without too much of a problem.

To calculate the sampling rate, I used the following relationship:

sampling frequency = (resolution per inch)*(inches per revolution)*(revolutions per second)
(in order to maximize the sampling frequency, we want all of these numbers (res/inch, inch/rev, rev/sec) to be as high as possible)
also notice how the sampling rate will decrease as the needle moves towards the center of the record (smaller inches/revolution)

First I'll start with revolutions per second.  Record players typically play at two different speeds: 33.3 and 45rpm.  (Some record players also have a 78rpm speed, but this is less common and only used for very old records).  If I use the higher, 45rpm speed I can calculate revolutions per second as follows:

revolutions per second = (revolutions per minute)/(seconds per minute)
revolutions per second = 45/60 = 0.75

Next is inches per revolution, this number depends on the circumference of the disk where the needle is hitting it. The largest sized records are 12" in diameter (30cm).  According to the RIAA standards, the outermost groove of a 12" record falls at a radius of 5.75" and the innermost groove falls at about 2.25".  I'll use these numbers to determine the range of sampling rates I can achieve at 33 and 45rpm.  The circumference (the distance in inches traveled by the needle during one revolution of the record) is calculated as follows:

inches per revolution = 2*pi*(radius of needle)
max inches per revolution = 2*pi*5.75 =~ 36
min inches per revolution = 2*pi*2.35 =~ 15

We already know that the resolution per inch of the laser cutter is 1200 (1200 dpi  in the x and y axes).  So combining this all we get:

sampling frequency = (resolution per inch)*(inches per revolution)*(revolutions per second)
max sampling frequency at 45 rpm = 1200*36*0.75 =~ 32400 = 32.4kHz

min sampling frequency at 45 rpm = 1200*15*0.75 =~ 13500 = 13.5kHz

This is a pretty good starting point.  If I scale this to 33.3rpm instead of 45 (this will allow me to fit more music on the record) the sampling rate becomes:

max sampling frequency at 33 rpm = 1200*36*0.5 =~ 21600 = 21.6kHz
min sampling frequency at 33 rpm = 1200*15*0.5 =~ 9000 = 9kHz

This is still easily enough to reproduce a recognizable song.

The next thing that I needed to think about was the bit depth.  Bit depth is the resolution of the audio data.  Most audio these days in 16 bit, meaning each sample can have one of 65536 (2^16) possible values.  8 bit audio has only 256 (2^8) steps of resolution and still sounds pretty close to the original.  (Music that is commonly referred to as "8-bit" like the music in early Nintendo games is actually 1 bit resolution, this low resolution is what gives it its unique and instantly recognizable sound, but I'm aiming for something that sounds a little more organic).

As I said in the last step, the grooves on these records are cut laterally.  The following equation calculates the horizontal distance that the needle will move as it traces the a wave of a given bit depth:

horizontal displacement of needle = (2^bit depth)*(precision of x/y axes)
where the precision of the x and y axes is 1200dpi or about 21 microns.  I used this to calculate the following table:

bit depth          horizontal displacement                steps of resolution

     2                             84um                                          4
     3                            168um                                         8
     4                            336um                                        16

     5                            672um                                        32
     6                          1.344mm                                      64
     7                          2.688mm                                     128
     8                          5.376mm                                     256

The bolded rows in the table are the numbers that I wanted to shoot for with this project.  Although a horizontal displacement of about 0.5mm is quite large compared to a normal record, I think somewhere in that range will work.

Step 3: Sine Tests

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As with my 3d printed records, I started off by printed out some sine wave tests to get an idea of what kind of frequency range I can achieve and to test out some parameters (laser power, cutting speed, material, wave amplitude).  I used Processing to generate sinusoidal paths and cut these first tests on white 3mm acrylic.

Here's the Processing code I used:

and here's a video of the results:

(the 139hz sine wave may be too low to hear with laptop speakers)
I was really happy with these first tests.  These is some noise in the background, but it's very consistent and the signal to noise ratio is pretty good.  Amplitudes of 4 and 6 sounds good across the frequencies tested here, as the frequency gets higher, you can hear a good amount of distortion on the amplitude 8 wave.

Different lasers and brands of laser cutter will respond differently, but this record was cut at 5000 freq with 100 speed (although the cutting head was moving very slowly due to the density of points on my vector path) and 12 power (enough to etch the surface but not to cut all the way through).

Step 4: Audio Tests on Acrylic

Picture of Audio Tests on Acrylic
I did a ton of sine tests for my 3D printed record, but I was anxious to launch into the audio for this much sooner so I just went for it.  Even though on some level I knew this would be a bit of a disaster, here's my first attempt with audio:

The song is Love Will Tear Us Apart by Joy Division.  My favorite of all the records I 3d printed was definitely the Joy Division one (the song Disorder), I like the creepy vibe the distortion gives it.

This laser cut joy division track is not quite there yet (though decently recognizable).  You can hear a lot of crunchiness on the drum beats, if you could look closely at the record, you would see that these areas of high frequencies were melted into oblivion by the cutter.  In this attempt I didn't make any effort to set a max frequency of the cuts, and the tighter cuts required by these sections apparently caused the laser to linger too long on the material.

I learned some things about the laser cutter from this attempt.  The first couple of tries I made on this cut caused the laser to freeze up almost immediately.  At first I thought I was overloading the machine with data, but then I realized that the machine does not like to receive extremely dense vector paths.  In fact, I found that if two points on a vector path are within about 6 pixels of each other, the laser will quit.  I had to amend my code to account for this.  Here is the Processing code I used:

As with the 3d printed record, I pulled the raw audio data from the original wav file using Python before sending it to Processing, that code can be found here.  And again, if someone knows a way to bypass this step, please feel free to leave a comment, I would much rather keep everything in Processing.

In my next test I set a limit on the angular distance between consecutive points, hoping to minimize melting of the material.  Here's the code:

   if(((xValLast-xVal)*(xValLast-xVal)+(yValLast-yVal)*(yValLast-yVal))>(minDist*minDist) && radCalc*abs(thetaLast-theta)>minAngDist){
        //store last coordinates in vector path
        xValLast = xVal;
        yValLast = yVal;
        thetaLast = theta;

...and the video:

The cut came out much cleaner, and you can hear significantly less distortion on the audio, but I thought I could still make it better.  In the next test I set the samples per revolution to a constant number (6000) and removed the minimum angular distance logic from my code.

At 6000 samples per cycle the sampling frequency of the audio is:

samples/sec  = samples/rev * rev/min * min/sec
samples/sec  = 6000 * 45 * 1/60 = 4.5kHz

Here's the code:

and the video:

Though it's a little hard to hear because of all the skipping, the cut came out much cleaner on this test.  You can also hear that the audio sounds slowed down, this was a rounding issue in my code that I dealt with later.  In my next test I decreased the amplitude of the wave to 12px to see if I could get the needle to stay in the groove.

    float amplitude = 12;

There are still a few issues.  Most notably, the record is warped from the cutting process.  Also the speed of the audio is still screwed up.  In my final version I fixed the speed issue (it was a rounding problem) and tried taping the acrylic down to the bed to see if that would help with the warping.  The settings I used on the laser cutter are:

laser settings (epilog 120W)
100 speed
12 power

In this cut I actually applied the proper RIAA equalization as well and used an anti-aliasing low pass filter of samplingRate/2 = 2.25kHz.

Here is the final code:

and the final product:

There was still some warping, but the tempo issues are completely resolved.  It's interesting to hear how much the audio quality degrades from the outside of the disk to the middle of the disk - this is due to lowered surface speed of the record as you move toward the center (explained in step 2).

Step 5: Audio Tests on Paper

Picture of Audio Tests on Paper
Next I tried this out with paper, first I used a sheet of thicker black (almost cardstock) paper.  I used the song rebel rebel as my test.

The settings on the laser were as follows:
speed 100
power 4
frequency 500

The resulting records looked great (see image above), and you can even hear the song coming through, but it had a lot of trouble with skipping:

So I picked up some new paper, this time it was much thicker, almost like thin cardboard.  I did some sine tests and found that setting the laser power to 7 was the deepest I could cut without going through the paper.  Then I did another test of rebel rebel, this time cut at 7 power and with the amplitude of the wave lowered to 10 (from 12).  The needle still will not stay in the groove by itself:

I also tried defocusing the laser from the paper to widen the cut (still at amp 12).  The inner cut is more defocused than the outer, notice how the needle is more stable, but the audio quality is lower.

Since the defocusing seemed to be the only way to keep the needle in the grooves, I tried defocusing the laser by reproducible distances to find the perfect balance between needle stability and low noise.  To do this I placed anywhere from 4 to 16 pieces of white printer paper on top of the cardstock while I ran the laser's autofocus.  This meant that the focal point of the laser would actually be a fraction of an inch above the surface of the cardstock.  That test is shown below, the outer rings are defocused by 4 sheets, the next 7, 10, 13, and 16 sheets.

I concluded that about 10-12 sheets defocused was the absolute minimum needed to keep the needle stabilized in the groove.

Step 6: Audio Tests on Wood

Picture of Audio Tests on Wood
Finally, I cut some records on wood.  Eventually I'd like to cut a record on a 12" wood round with a raw edge, kind of like this, you could cut the grooves right onto the rings of the tree.  For now I have some nice maple sheet to cut, but I did my firsts tests on ply.  I started by using similar settings that I used on the acrylic:

power = 12
speed = 100
freq = 500
amp = 12

This cut looked great, but the needle skipped a lot, I had to hold it in place to shoot this video.  I went back and did some sine wave tests and found that 15 power was more stable, so I ran another audio test at 15 power:

This cut was much more stable, but skipping was still an issue, you can also hear the same tempo issues I was having with the acrylic (I was cutting all these records at the same time).  Next I tested lowering the amplitude of the cut to 10:

I also tried defocusing the laser to widen the groove, keeping the amplitude at 12.  The outer groove is slightly defocused, the inner grove is more heavily defocused:

Both defocusing and lowering the amplitude of the cut helped to minimize skipping, but the defocusing introduced more noise into the audio.  For my final plywood test I lowered the amplitude to 10 and kept the laser focused, I also fixed the tempo issue in my code.  Here is the result:

Unfortunately at this point I was using the last of our plywood stock, so I couldn't be too picky about how flat the ply was, but it still (surprisingly) plays fine(ish).  Here's the code I used:

Next I used the maple.  Fortunately, noahw helped me track down a 13" wide curly maple board and cut it into a two flat sheets: one was about the thickness of a real vinyl record at about 1/16" and other a little thicker at 1/8".  I sanded the maple sheets to about 1500grit and finished them before cutting.  I did a few tests on a piece of scrap and found that the power setting I was using on the ply was cutting so deeply into the maple that I would not be able to cut both sides.  I did a few more experiments with defocusing and actually did a full attempt using the song sunday morning by the velvet underground:

In this test I defocused the laser by the width of 11 sheets of normal printer paper.  I used the following laser settings:

power = 4
speed = 100
freq = 500
amp = 10

This cut came out a little noiser than I was hoping.  Since the needle wasn't having any issues staying in the groove, I defocused by only 9 sheets of paper and kept the same power settings.  On the other side of the sunday morning disc, I cut femme fatale:

While I was adjusting some tape to try to keep the wood lying flat in the middle of the cut, I accidentally bumped it to the side slightly.  If you look closely at the video, you'll see where the error is, it caused the needle to skip a groove, but other than that the cut came out great.

This song helped me pin down an error in my code, if you listen closely during the chorus, you'll notice that the backing vocals are missing.  When I looked back at the song, I noticed that the vocals are only found in the left channel of the track, so it seems that I was not combining the two channels before converting to a vector file.  I think I've fixed the problem in my python script, but I'll have to run a test to know for sure.  In the meantime, you can work around this problem by importing your stereo audio into Audacity, right clicking on the track and selecting "split stereo to mono", saving the file as a wav, opening that saved file in Audacity again, copying the track, and right clicking on each of the duplicate tracks to set one to left channel and one to right channel.

Step 7: Make Your Own

Picture of Make Your Own
You can convert your own audio files into vector cutting paths in ten easy steps:

1.  Download Processing.

2.  Download Python 2.5.4.

3.  Download Audacity.

4.  Download the code from GitHub (you can download the zip file by clicking on the cloud button).  Unzip and open the folder called LaserCutRecord.

5.  Open an audio file of your choice with Audacity.  Go to Effect>Equalization and select RIAA.  Hit inverse and apply, you should now hear the higher frequencies of your track boosted.

6.  Go to Effect>Low Pass Filter... and apply an anti-aliasing filter (a fancy word for a low pass filter) to your audio.  You will have to choose the cutoff frequency according to the max sampling rate that you can get with your cutter.  For example, my laser cutter melts anything above 2.5kHz at 45rpm, so I set my anti-aliasing filter cutoff to this same frequency.  Set the drop off as high as possible, for me this was 48dB/octave, that way the filter will have a hard cutoff.

7.  Use Effect>Amplify to amplify the signal as much as you can without noticeable effects of clipping (you will be able to get away with some clipping, and remember this is not crystal clear audio anyway). You may also want to mess around with Effect>>Compressor.

8.  Make sure there are 2 sec of blank audio at the end of the track so that nothing gets clipped and keep the audio under 3:10.  File>Export this file and save it in the "LaserCutRecord" folder as a wav file. 

9.  Open the Python file called "wavtotxt".  Copy the file name of the file you just saved in the line:

             fileName = "your_file_name_here.wav"

Hit Run>RunModule, after a minute or two you will have a .txt file saved in the Record Generator folder.

10.  Open the Processing sketch.  Change the name of the import file in the Processing sketch to your txt file name:

             String filename = "your_file_name_here.txt";

Run the Processing sketch Sketch>Run.  The Processing sketch will output several files, none larger than 700KB (I found that larger files were crashing the laser cutter).  The last file will also contain the cut paths for the inner hole and outer edge of the record, you will need to set your laser cutter to cut these lines at a higher power, so that it cuts all the way through the material.  Another very important note about cutting these files - the reason I had to split each song up into five parts is because I found that files larger than 800KB would crash my laser.  When you are cutting out the sequential files, you MUST shut down the laser for a second to clear it's memory and then turn it back on before sending it a new 700KB file to cut, you will have problems if you forget this.

Once you've made cutting files, post them!  You can upload files in the comments by clicking on "Rich Editor."  Enjoy, and let me know if you have questions or need help getting this to work.  I've tested this process Mac OS using the latest version of Processing.  If you actually end up cutting your own record, please post the results in the comments, I'm really curious to see where this code ends up!

In case you are stuck trying to find a machine to cut your files, check this list of worldwide hackerspaces, these are places where anyone can go for little to no money and use tools in a collaborative work environment.  If you are in school, you might ask the engineering or art departments if they have a machine than can cut vector files.  Otherwise, I'd recommend checking out an online fabrication service such as Ponoko.  Some people even build their own laser cutters, there are many builds documented right here on Instructables, we're even giving one away in our Epilog Challenge.
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Hi all. I've completed my pdfs (thanks for the code!), and am ready to cut. I wanted to check... should the record groove be a cutting or engraving path?

If it is a cutting path, is there a way of separating out the cuts for the inner/ outer dimensions of the record into a separate file (so they can be cut all the way through at higher power)?

As a variation of the acrylic version, I've got a box of old laserdiscs from the 90's I'm happy to sacrifice- they would look really cool! The outer circumference is within 1 or 2 mm, but the spindle hole is larger, so I just need to modify the code to enlarge the hole to the size of the old 45rpm singles, so I can play them with a regular spindle adaptor.

Hi Amanda, great project, i want to try this with my cnc mill.. Did you hear about anyone that was able to do it, or has everyone been using laser cutters only?

Hi all. I'm a D&T teacher, and wanted to try this to demo to my students.

After completing the record, has anyone tried using different styli- Given that the grooves are larger than LP grooves, I was wondering if certain types of stylus i.e. those for 78's might maximise tracking and sound quality, as opposed to an LP stylus.

any thoughts appreciated

my4pop11 month ago

Very nice liked. I hope you the further development.

Udemyrobert1 month ago

Going to check this on personal record.

Great design, just proves that music can be made on anything


bizsai1 month ago

This one was far better than other tut Thanks to writer.

waxpress1 month ago

The audio quality of some of these actually seems quite listenable, except for the constant background noise -- any thoughts on what would be involved in decreasing the amount of noise? It seems like this might be improved even without increasing bit depth/sampling rate.

waxpress1 month ago

I'm wondering whether you think the quality could be improved with this machine, which is listed as 4000 steps per inch (or 32000 with an upgrade), compared to 1200 with the laser you used.

Is that the main factor that would be involved in improving quality? What other factors would you consider?

interesting, i've got some wood in the back here............oh no its the wrong type.

I am confused on step 10 what do I rename in processing?

the name of your song, the text file to import.

Jrisby5 months ago
Hey there. I Have recently tried this and it had cut 3/4 of the grooves then preceded to cut the inner and outer circles. Do you know why it might be stoping?
amandaghassaei (author)  Jrisby2 months ago

you'll probably have to split it up into a few files and send them one by one without moving the material in between cuts. There's a variable called numGroovesPerFile (or something similar) download the latest code from github and try lowering that number.

george.titsworth made it!4 months ago

Thanks for the instructable! This is going to make a really nice Christmas gift!

I did mine on a mini-helix. The current record does not play very well.. lots of noise, a little skipping, but you can make out the tune and it looks great. I'm going to ply around a little more with it when I can to try to clean up the sound.

amandaghassaei (author)  george.titsworth2 months ago

just saw this, so cool! Do you have a video? what song is it?

Snellingkorey2 months ago

Not a bad idea, not sure it'll replace my ipod though :)

spenhoo1 year ago

I'm getting this error, not sure what to do about it. Any suggestions?

Traceback (most recent call last):

File "/Users/....(directory)........../", line 21, in <module>

frameInt = map(ord, list(frame))#turn into array


Is it just that my file is too big to do this way?

amandaghassaei (author)  spenhoo12 months ago

haven't seen that one before. how many min is your song?

It's 30 minutes - I know that exceeds vinyl limit I think for one side
But maybe I'll try it again.. Could've been a glitch in my process...
stoney3k spenhoo3 months ago

If it exceeds the vinyl limit it means the groove pitch is too narrow and cuts will overlap. That may cause the error.

amandaghassaei (author)  spenhoo12 months ago

Try 5-6 min and see if that works.

KonradC18 months ago

Nice proof of concept but falls far from being listenable. Now I don't know much about laser etching a record but I used to be a lathe operator for the cutting of vinyl records back in the 90's. There are a few things you haven't taken into account it seems. the lower rotational speed of the inner groves is the reason the sound degrades so much near the end of a song. It happens on regular records as well but it's not as noticeable. It looks like your grooves are too wide as well...

Best of luck with this!

stoney3k KonradC13 months ago

I guess you could get a lot better quality if you modified the laser cutter to accept a turntable and cut along the axis of the record in a tangential tracking manner. After all, that's how *actual* masters are cut.

soulomon4 months ago

Someone should hack a DVD-R firmware to print 4.7" flexi discs!
Thank you for your amazing work Amanda.

stoney3k soulomon3 months ago

You know, that *could* work if you have a LightScribe or LabelFlash burner and compatible discs.

Peter Mikulik3 months ago

Hello Amanda,

I am so blown away by this work. I would rather like a copy of a record of the Beach Boys Pet Sounds album on this wooden record. How much would you charge to make one of these for me? At your convenience. How much ? even the Velvet Underground would be cool too. Please let me know I would really appreciate it. I am not so technical so I could not do it myself. Please let me know if you would be able to do for a charge :) Thank you, Peter and you can contact me best at Thank you again in dance :)

Hi, When I go to open the Python wavtotext file it flashes up for a second then disappears, do you know why this would happen?

I had this problem to so I had to open python idle

amandaghassaei (author)  jamesburkill1 year ago

did you figure it out? what version of python are you using?

soulomon4 months ago

Someone should hack a DVD-R firmware to print 4.7" flexi discs!
Thank you for your amazing work Amanda.

davidbarcomb4 months ago

Great project, I must try this

hey i thought i sent a message already but i cant find it!
I'm having trouble when i get to the cutting stage, it seems to just skip some (most) of the files? it seems to not recognise that there's any data being sent. is this just because the files are too big?

yeah I've seen that to. are you using illustrator to send files into the laser? The workaround is to grab the latest code and decrease the variable numGroovesPerFile until you can import each file without losing info. Or if you open the files in adobe reader and "print" from there it should work, but you won't be able to edit/move anything.

CasualTuxedos7 months ago

Do you need a 120 watt, 1200 dpi laser? What is the minimum laser requirement?

amandaghassaei (author)  CasualTuxedos7 months ago

the wattage doesn't matter - as long as you can cut through the material. You will have to play around with the settings to get the groove etching just right. I wasn't really taking full advantage of the 1200 dpi because the kerf of the laser is so wide, I'm sure it would work with something less than 1200, but I haven't tried.

Hi, thanks. Does it have to cut THROUGH the material? Does engraving not work?

amandaghassaei (author)  CasualTuxedos5 months ago

you'll want to cut through for the profile of the disc and the center hole.

peigan8 months ago

im getting an error on python:

Traceback (most recent call last):

File "/Users/eidtecnico/Downloads/LASER RECORDS/LaserCutRecord-master/LaserCutRecord/", line 26, in <module>

frameOneChannel[i] = frameInt[4*i+1]*2**8+frameInt[4*i]#separate channels and store one channel in new list

TypeError: 'map' object is not subscriptable


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