cnc Music!!

[ryanhathy]

Three Axis gcode -

%
( Star Wars Theme Song )
G91 G01 X0.0009175 Y0.0009175 Z0.00108265 F0.2202
X0.0009175 Y0.0009175 Z0.00108265
X0.0009175 Y0.0009175 Z0.00108265

X0.0049 Y0.0049 Z0.005782 F0.294
X0.00734 Y0.00734 Z0.0086612 F0.4404

X0.001635 Y0.001635 Z0.0019293 F0.3924
X0.001543 Y0.001543 Z0.00182074 F0.3704
X0.001375 Y0.001375 Z0.0016225 F0.33
X0.0098 Y0.0098 Z0.011564 F0.588
X0.00367 Y0.00367 Z0.0043306 F0.4404

X0.001635 Y0.001635 Z0.0019293 F0.3924
X0.001543 Y0.001543 Z0.00182074 F0.3704
X0.001375 Y0.001375 Z0.0016225 F0.33
X0.0098 Y0.0098 Z0.011564 F0.588
X0.00367 Y0.00367 Z0.0043306 F0.4404

X0.001635 Y0.001635 Z0.0019293 F0.3924
X0.001543 Y0.001543 Z0.00182074 F0.3704
X0.001635 Y0.001635 Z0.0019293 F0.3924
X0.0055 Y0.0055 Z0.00649 F0.33
%

[ryanhathy]

*** Example 2 - Star Wars Imperial March ***


Converting Notes to numbers -

F#2- .5 x 0.004624 = 0.002312 F0.2774
F#2- .5 x 0.004624 = 0.002312 F0.2774
F#2- .5 x 0.004624 = 0.002312 F0.2774
D2 - .225 x 0.00367= 0.00082575 F0.2202
A3 - .125 x 0.0055 = 0.0006875 F0.33

F#2- .5 x 0.004624 = 0.002312 F0.2774
D2 - .225 x 0.00367= 0.00082575 F0.2202
A3 - .125 x 0.0055 = 0.0006875 F0.33
F#2- 1 0.004624 F0.2774

C#3- .5 x 0.006928 = 0.003464 F0.4156
C#3- .5 x 0.006928 = 0.003464 F0.4156
C#3- .5 x 0.006928 = 0.003464 F0.4156
D3 - .225 x 0.00734= 0.0016515 F0.4404
C#3- .125 x 0.006928= 0.000866 F0.4156

F2 - .5 x 0.004366 = 0.002183 F0.262
D2 - .225 x 0.00367= 0.00082575 F0.2202
A3 - .125 x 0.0055 = 0.0006875 F0.33
F#2- 1 0.004624 F0.2774

F#3- .5 x 0.009248 = 0.004624 F0.5548
F#2- .225 x 0.004624= 0.0010404 F0.2774
F#2- .125 x 0.004624= 0.000578 F0.2774
F#3- .5 x 0.009248 = 0.004624 F0.5548
F3 - .225 x 0.008732= 0.0019647 F0.524
E3 - .125 x 0.00824 = 0.00103 F0.4944

D#3- .25 x 0.00778 = 0.001945 F0.4668
D3 - .25 x 0.00734 = 0.001835 F0.4404
D#3- .25 x 0.00778 = 0.001945 F0.4668
Rest P.25
G2 - .25 x 0.0049 = 0.001225 F0.294
C#3- .5 x 0.006928 = 0.003464 F0.4156
A#3- .225 x 0.005828= 0.0013113 F0.3496
A3 - .125 x 0.0055 = 0.0006875 F0.33

A3 - .125 x 0.0055 = 0.0006875 F0.33
G#2- .125 x 0.00519= 0.00064875 F0.3114
A3 - .25 x 0.0055 = 0.001375 F0.33
Rest P.25
D2 - .25 x 0.00367 = 0.0009175 F0.2202
F2 - .5 x 0.004366 = 0.002183 F0.262
D2 - .225 x 0.00367= 0.00082575 F0.2202
F2 - .125 x 0.004366=0.00054575 F0.262

A3 - .5 x 0.0055 = 0.00275 F0.33
F#2- .225 x 0.004624= 0.0010404 F0.2774
A3 - .125 x 0.0055 = 0.0006875 F0.33
C#3- 1 0.006928 F0.4156

F#3- .5 x 0.009248 = 0.004624 F0.5548
F#2- .225 x 0.004624= 0.0010404 F0.2774
F#2- .125 x 0.004624= 0.000578 F0.2774
F#3- .5 x 0.009248 = 0.004624 F0.5548
F3 - .225 x 0.008732= 0.0019647 F0.524
E3 - .125 x 0.00824 = 0.00103 F0.4944

D#3- .125 x 0.00778= 0.0009725 F0.4668
D3 - .125 x 0.00734= 0.0009175 F0.4404
D#3- .25 x 0.00778 = 0.001945 F0.4668
Rest P.25
G2 - .25 x 0.0049 = 0.001225 F0.294
C#3- .5 x 0.006928 = 0.003464 F0.4156
B3 - .225 x 0.006172= 0.0013887 F0.3704
A#3- .125 x 0.005828= 0.0007285 F0.3496

A3 - .125 x 0.0055 = 0.0006875 F0.33
G#2- .125 x 0.00519= 0.00064875 F0.3114
A3 - .25 x 0.0055 = 0.001375 F0.33
Rest P.25
D2 - .25 x 0.00367 = 0.0009175 F0.2202
F2 - .5 x 0.004366 = 0.002183 F0.262
D2 - .225 x 0.00367= 0.00082575 F0.2202
A3 - .125 x 0.0055 = 0.0006875 F0.33

F#2- .5 x 0.004624 = 0.002312 F0.2774
D2 - .3 x 0.00367 = 0.001101 F0.2202
A3 - .185 x 0.0055 = 0.0010175 F0.33
F#2- .75 x 0.004624= 0.003468 F0.2774

[ryanhathy]

Star Wars Imperial March gcode - tested and works on my machine.

%
( Star Wars Imperial March )
G91 G01 X0.002312 F0.2774
X0.002312 F0.2774
X0.002312 F0.2774
X0.00082575 F0.2202
X0.0006875 F0.33

X0.002312 F0.2774
X0.00082575 F0.2202
X0.0006875 F0.33
X0.004624 F0.2774

X0.003464 F0.4156
X0.003464 F0.4156
X0.003464 F0.4156
X0.0016515 F0.4404
X0.000866 F0.4156

X0.002183 F0.262
X0.00082575 F0.2202
X0.0006875 F0.33
X0.004624 F0.2774

X0.004624 F0.5548
X0.0010404 F0.2774
X0.000578 F0.2774
X0.004624 F0.5548
X0.0019647 F0.524
X0.00103 F0.4944

X0.001945 F0.4668
X0.001835 F0.4404
X0.001945 F0.4668
G04 P.0625
G01 X0.001225 F0.294
X0.003464 F0.4156
X0.0013113 F0.3496
X0.0006875 F0.33

X0.0006875 F0.33
X0.00064875 F0.3114
X0.001375 F0.33
G04 P.0625
G01 X0.0009175 F0.2202
X0.002183 F0.262
X0.00082575 F0.2202
X0.00054575 F0.262

X0.00275 F0.33
X0.0010404 F0.2774
X0.0006875 F0.33
X0.006928 F0.4156

X0.004624 F0.5548
X0.0010404 F0.2774
X0.000578 F0.2774
X0.004624 F0.5548
X0.0019647 F0.524
X0.00103 F0.4944

X0.0009725 F0.4668
X0.0009175 F0.4404
X0.001945 F0.4668
G04 P.0625
G01 X0.001225 F0.294
X0.003464 F0.4156
X0.0013887 F0.3704
X0.0007285 F0.3496

X0.0006875 F0.33
X0.00064875 F0.3114
X0.001375 F0.33
G04 P.0625
G01 X0.0009175 F0.2202
X0.002183 F0.262
X0.00082575 F0.2202
X0.0006875 F0.33

X0.002312 F0.2774
X0.001101 F0.2202
X0.0010175 F0.33
X0.003468 F0.2774
%

[neilw20]

*** Formula to convert frequency to feed rate ***

Divide the note frequency by 666.67 to get the equivalent mm/minute to achieve that frequency. Double the result for each octave & multiply by 25.4 (for the same steppers and screw pitches)

Inches per minute -

---------------------------------- -1- ---- -2- ---- -3- ---- -4- ---- -5-
A -- 55.00 ----> 55.00/666.67 -- 2.0955 -- 4.191 --- 8.382 -- 16.764 -- 33.528

A# - 58.27 ----> 58.27/666.67 -- 2.220 --- 4.440 --- 8.880 -- 17.760 -- 35.520

B -- 61.74 ----> 61.74/666.67 -- 2.352 --- 4.704 --- 9.408 -- 18.816 -- 37.632

C -- 65.41 ----> 65.41/666.67 -- 2.4917 -- 4.9834 -- 9.967 -- 19.934 -- 39.867

C# - 69.30 ----> 69.30/666.67 -- 2.6391 -- 5.2782 - 10.556 -- 21.113 -- 42.226

D -- 73.42 ----> 73.42/666.67 -- 2.7965 -- 5.5930 - 11.186 -- 22.372 -- 44.744

D# - 77.78 ----> 77.78/666.67 -- 2.9642 -- 5.9248 - 11.857 -- 23.714 -- 47.427

E -- 82.41 ----> 82.41/666.67 -- 3.1394 -- 6.2788 - 12.5576 - 25.1152 - 50.2304

F -- 87.31 ----> 87.31/666.67 -- 3.3274 -- 6.655 -- 13.310 -- 26.619 -- 53.238

F# - 92.50 ----> 92.50/666.67 -- 3.5230 -- 7.046 -- 14.092 -- 28.184 -- 56.368

G -- 98.00 ----> 98.00/666.67 -- 3.7338 -- 7.4675 - 14.935 -- 29.870 -- 59.741

G# - 103.83 --> 103.83/666.67 -- 3.9548 -- 7.9096 - 15.819 -- 31.638 -- 63.277


e&oe (errors & omissions accepted)

That's for those who like too do it the hard way.
The easy way... Put a G20 at the start of the program and a G21 at the end.
Nice to have M30 at the end for ease of replay.

Some nice effects can be had by rotating the axis on screen 2.
30 degrees plays X and Y an octave apart.
45 degrees lets Y play in unison. Bit louder that way too.
Does 41.86 degrees give nice harmony? Must try that.
What about slaving the Z axis with the Y, with Z scaled by 0.5 for some nice BASS.
Hmmm.. Now what can I use the 4th axis for?

[epineh]

Hmmm...somedays I wish I never pulled the steppers out of my machine and installed servo's

Russell.

[.xXACEXx.]

i sorta wish i had my machine built ,just so i could listen to the star wars thingy i could give up on trying to learn guitar ! lets see ,we could try "hells bells" , "iron man" , "smoke on the water" oh the possibilities are endless!!

[ryanhathy]

I like your ideas neilw20. I'm uploading an excel spreadsheet that I've put together to make things a lot easier. Hopefully I didn't make too many mistakes or forget something important. I did include metric info this time. I'm really new to this, so I don't even know how to work with the A axis yet. I tried it and it didn't work out so well. I'm not sure how to work the feed rate when the rotary table works in degrees instead of inches or millimeters. I'll have to figure that one out later I guess.

[neilw20]

Now all we have to do is figure out the structure of some music program data formats, so we can convert, or make a plugin to generate G-Code directly from the dots.
I tried out imperial march. Works ok. Wish my machine had a few loose parts (LOL) so that it sounded as load as a router.

Get the machine to engrave the actual dots it is playing, instead of just moves in a straight line towards 'machine exceeded soft limits'.

Must do some real work now.

[ryanhathy]

To avoid crashing the machine, reverse direction every note, or every several notes. Just add a negative "-" to the distances you want to reverse.

To make things easier, a new profile can be setup for the machine in Mach 2/3 just for playing music. All the motors can be tuned exactly the same so that the same numbers can be used for all axis. This would solve my problem of not knowing how to use the A axis.

MIDI files are great for extracting music information from. Free software can be downloaded that both plays the files and shows you the sheet music. http://www.notation.com/DownloadNotationPlayer.htm
Also, MIDI files can be downloaded for free online. Some ring tones for cell phones are MIDI. Here's just a couple of the many free MIDI sites.
http://www.mididelight.com/
http://www.free-midi.org/

This software will allow you to view the MIDI code as text,
but it's only a 5 day demo: http://www.gnmidi.com/

Viewing the sheet music for MIDI's is a great way to convert a song manually. If you want to do it with software it can be done a lot easier by being able to translate the MIDI code and convert it to gcode. Here is some info on MIDI code:
http://www.omega-art.com/midi/
http://www.harmony-central.com/MIDI/Doc/

There are a couple of limitations to think about with Mach 2/3 and gcode. You have 3 to 6 motors so you could potentially play that many different notes to form chords. The problem is-is you can't control feed rate (that I know of) independently for each axis. It's been mentioned that you can set the scaling differently for each axis and this would cause each axis to play a different note, but it would be fixed, so you couldn't change chords. You would have to use the same offset for the whole song (unless there is gcode that can change it during operation). It has also been suggested to use angles to get different notes to form chords. This would be the visual side of it. In effect you would be shortening one axis distance of travel and lengthening another axis so as to cause the motors to run at different speeds to create different frequencies on each axis. This has a lot of potential, but is also potentially very complex. Especially with a higher number of axis. The math involved may get a little tricky.

[ryanhathy]

i sorta wish i had my machine built ,just so i could listen to the star wars thingy i could give up on trying to learn guitar ! lets see ,we could try "hells bells" , "iron man" , "smoke on the water" oh the possibilities are endless!!

Well, I don't think I can make your first wish come true, but here are some MIDI files you might like.

[neilw20]

G68 rotates axis. Info in Mach3 manual. Can't cut/paste. Protected file.
G69 Cancels rotation.
You can change the rotation on a note by note basis to change voicing of chords.
Usually I play Tuba with a group of 30 to an audience of 1000.
Must incorporate SX3 in the next concert (LOL - MDs sense of humor limited to real instruments)

[ryanhathy]

G68 rotates axis. Info in Mach3 manual. Can't cut/paste. Protected file.
G69 Cancels rotation.
You can change the rotation on a note by note basis to change voicing of chords.
Usually I play Tuba with a group of 30 to an audience of 1000.
Must incorporate SX3 in the next concert (LOL - MDs sense of humor limited to real instruments)

I found it on page 128, thanks. That helps a lot since I don't even know how to use my A axis.
http://www.machsupport.com/docs/Mach3Mill_1.84.pdf

I think I might go with tuning all the motors the same so the same numbers can be used. I think that would make it a lot easier.