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2020/11/14 19:23

13/15

MIDIbox Quad Genesis: Front Panel

MIDIbox - http://www.midibox.org/dokuwiki/

need lots of extras. For the LED pipes, because they are friction-fit, buy at least double the
number you will need; and for the buttons, at least 20 extra or so.
The total cost to have these items printed should be roughly $20-$30 plus shipping. If someone
is trying to charge you more than that, either there's an issue (like they got the scale wrong and
think you want giant-sized parts), or they're trying to gyp you. If you try to get these printed
by a commercial service (e.g. Ponoko), they will charge a minimum of $1 per part and
the result will be prohibitively expensive!
 Have them printed by a real person instead,
either a friend with a 3D printer or possibly someone from the RepRap forums.

Things You Need to Tell the Person Printing Them

The scale in the STL files is 1 INCH, not 1 mm. The buttons should be about 1/2“ or 12mm wide.
(This is not intended as an engineering dimension, just as a sanity check–use the actual
dimensions in the file.)
Either ABS or PLA transparent filament should work. I had the guy who made them for me do
tests with both, and I liked the light-up appearance of the ABS better but the “off” appearance
of the PLA better. But they were pretty similar.
I had the guy who made them for me do tests with different fill rates, and if I remember
correctly around 10% fill worked best. 100% fill would be needlessly expensive and would dim
the LEDs.
The buttons need to be printed with the flanges and the cutout down, and the beveled
rectangular surface up. The LED pipes need to be printed with the flat surface down and the
crown-shaped end up.

Downloads

(You must be logged in with your MIDIbox Forum account to access the downloads)

mbqg_fp_buttons.stl

mbqg_fp_ledpipes.stl

Assembly Guide

Once you have your front panel PCB, your aluminum front panel, and all the other parts, here's some
tips for the assembly process.

Begin by soldering all the SMD shift registers and resistor packs. The pads aren't very big (if I

1.

had known, I would have made them bigger…), and I had a lot of issues with bad connections
because a leg which looked soldered wasn't actually attached. If you have access to solder
paste and a heat gun, use that. If not, apply solder to two corner pads on the board, place the
chip on and melt those two legs into the solder to connect them. Adjust the position so that all
the pins line up correctly. Then solder the rest of the legs, making sure to press down firmly
with the iron on each leg just before applying the solder, in hopes that the leg will conduct heat
to the copper and then when you apply the solder it will flow across the two.
Solder the diodes, the two discrete resistors, the through-hole resistor packs, and the ceramic

2.

capacitors.
Solder all the tactile switches. Only solder two pins of each switch to start, and make

3.

Summary of Contents for MBQG FP

Page 1: ...oder The dual gang and single gang potentiometers one each per synth not per module for the Genesis module volume controls and their appropriate knob caps see MBHP_GENESIS A whole bunch of M3 or 4 40...

Page 2: ...some reason it shouldn t be hard to replace them with holes All the LED holes and screw mounting holes are 1 8 3 17 mm which should give 3mm LEDs a little play some are in practice slightly wider than...

Page 3: ...Ibox FM V2 0 V2 1 I used cheap encoders from China to save money and many of them barely work anymore Of course the color of all the LEDs is completely up to personal preference though you should alwa...

Page 4: ...in the FM widget it may have been because I wanted clear looking LEDs in the FM widget to go with all the other clear white things there or because these LEDs are closer to yellow than to amber and t...

Page 5: ...ng Blue FM operator parameter Atk Rate A4 Encoder 16 LED ring Blue FM operator parameter Dec1 Rate A5 Encoder 16 LED ring Blue FM operator parameter Dec1 Level A6 Encoder 16 LED ring Blue FM operator...

Page 6: ...Green System Mode A84 Button LED Green Voice Mode A85 Button LED Green Channel Mode A86 Button LED Green Program Mode A87 Button LED Green VGM Editor Mode A88 Button LED Green Modulator Mode A89 Butto...

Page 7: ...al button diodes included in Assembly or Switch DS1 LED Display Red Main Display DS2 LED Display Red Octave DS3 DS6 LED Display Red Frequency E1 Encoder N A OPN2 voice parameter Octave E2 Encoder N A...

Page 8: ...keys S24 Button N A Enter TF1 Triforce Red Triforce of Power TF2 Triforce Blue Triforce of Wisdom TF3 Triforce Green Triforce of Courage U1 U12 IC N A 74HC595 Output Shift Register SMD U13 U20 IC N A...

Page 9: ...OW5 DRIVER ACTIVE HIGH 6 ROW6 DRIVER ACTIVE HIGH 7 ROW7 DRIVER ACTIVE HIGH U2 2 0 LR_G1_DAC LG_G1_DAC LR_G2_DAC LG_G2_DAC LR_G3_DAC LG_G3_DAC LR_G4_DAC LG_G4_DAC 1 LR_G1_V1 LG_G1_V1 LR_G2_V1 LG_G2_V1...

Page 10: ...X DETUNE_O5 DETUNE_O6 DETUNE_O7 6 HARM_O15 HARM_O14 HARM_O13 HARM_O12 HARM_O11 HARM_O10 HARM_O9 HARM_O8 7 HARM_O0 HARM_O1 HARM_O2 HARM_O3 HARM_O4 HARM_O5 HARM_O6 HARM_O7 U7 7 0 OP1LVL_O0 OP1LVL_O1 OP...

Page 11: ...A 7 LFOFREQ ENCODER B U14 2 0 B_MENU B_G1_V2 X B_G2_V2 X B_G3_V2 B_ENTER B_G4_V2 1 B_SOFT1 B_G1_V3 B_SOFT2 B_G2_V3 B_SOFT3 B_G3_V3 B_SOFT4 B_G4_V3 2 B_SOFT5 B_G1_V4 B_SOFT6 B_G2_V4 B_SOFT7 B_G3_V4 B_...

Page 12: ..._MUTE B_RESTART B_SOLO B_PLAY B_RELEASE B_RESET B_PNLOVR 7 B_PROG EB_DATAWHL B_VGM B_SYSTEM B_MDLTR B_VOICE B_SAMPLE B_CHAN 3D Printed Items The buttons on MBQG_FP consist simply of a 5mm tact switch...

Page 13: ...ll rates and if I remember correctly around 10 ll worked best 100 ll would be needlessly expensive and would dim the LEDs The buttons need to be printed with the anges and the cutout down and the beve...

Page 14: ...7 front panel and are ush with its surface I used a small piece of wood to hold the displays ush with the surface while soldering them pushed in all the way will not be ush with the surface it will b...

Page 15: ...ns especially the ones in the middle of the voice selection buttons Once all the screws are in place ip over the panel and add the washer and nut to each 11 encoder Finally hand tighten all the screws...

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