Let me explain you how it works:
The machines passwords are based on algorythm, it means that it will works differentaly for each characters. Some people found out that it was working on the first 3 letter of your name( my name is "CHASTR" so it will work on "C","H","A").
1) So the first thing you will need is to find out the first 3 letters of your name^^.
2) Each letter has a number :
A=00 B=01 C=02 D=03 E=04 F=05 G=06 H=07 I=08 J=09
K=10 L=11 M=12 N=13 O=14 P=15 Q=16 R=17 S=18 T=19
U=20 V=21 W=22 X=23 Y=24 Z=25
3) Each machine has an element, and elements have numbers too:
Fire = 00
Earth = 01
Water = 02
Wind = 03
Ice = 04
Thunder = 05
Light = 06
Darkness = 07
-And here is how you will get your password:
Password = (First Letter + Machine Element) (Second Letter + Machine Element) (Third Letter + Machine Element) (Sum of three letters + (Machine Element * 4))
-And here I tell you the machine position and its element:
-Dangruf Wadi : Fire/Red : E-11
-Gusgen Mines : Earth/Brown : J-5 on 2nd map
-Ordelle's Caves : Wind/Green : E-12 on 2nd map
-Crawler's Nest : Water/Blue : J-8 on 3rd map
-Garliage Citadel : Light/White : J-8 on 3rd map
-Eldieme Necropolis : Ice/Blue : J-13 on 4th map
-Maze of Shakrami : Dark/Black : K-10 on 2nd map
-Outer Horotuto Ruins : Lightning/Purple : E-6 on 5th map
-After getting the password you status will be "Doctor" on the machine and it will ask you to trade:
A) an "Infinity Core" In the AH under Other then Misc. or can be gotten in the CoP expansion *
B) an "Elemental Chip": which can be gotten at the following locations in the major cities :
Blabbivix is at F-6 in Bastok Port. (He's at the farthest F-6 wall, back behind the last building)
Gaudylox is at F-4 in Sand'Oria North.
Scavnix is at H-4 in Windhurst Walls.
Buy a chip that corresponds to the correct element/color of the machine and area you're heading to
"Dangruf wadi" trade a red "Elemental Chip")
Note : You can only do this once a day on each machine (so 8 machines a day in non-Vana'Diel tim).
This works at a 100% you can get Rune weapons, Cermet chunks and much more random items if you got any questions send me a message.
To answer to some question for example with Fire machine (Dangruf Wadi) I get "00182038" with "Cha" ... Hope this helps you!
Here is the locations and correpsonding chip color/element that you need:to trade the machine along with an infinity core after you have "Doctor Status"
Dangruf Wadi Red Chip
Gusgen Mines Yellow Chip
Ordelles Caves Green Chip
Crawlers Nest Blue Chip
Garlaige Citadel White Chip
The Eldieme Necropolis Clear Chip
Maze of Shakhrami Black Chip
Outer Horutoto Ruins Purple Chip
Here are items that you can get:
Rune Axe Lv.70 WAR/BLM/DRK/BST/BRD/RNG/SMN
DMG:45 Delay:276 Latent effect: Attack+5 Adds "Regen" effect / 4MP/3sec
Rune Staff Lv.70 WAR/MNK/WHM/BLM/RDM/BST/BRD/SMN
DMG:32 Delay:366 Latent effect: INT+2 MND+2 CHR+2 "Magic Atk. Bonus" / 4MP/3sec
Rune Chopper Lv.70 WAR/BLM/DRK/BRD/SMN
DMG:88 Delay:504 Latent effect: Accuracy+5 Haste+9% / 4MP/3sec
Rune Baghnakhs Lv.70 WAR/MNK/BLM/RDM/THF/DRK/BST/BRD/NIN/SMN
DMG:+13 Delay:+60 Latent effect: STR+7 "Counter"+1 / 4MP/3sec
Rune Halberd Lv.70 WAR/BLM/PLD/BRD/SAM/DRG/SMN
DMG:68 Delay:396 Latent effect: DEX+6 "Double Attack"+5% / 4MP/3sec
Rune Blade Lv.70 WAR/BLM/RDM/THF/PLD/DRK/BRD/RNG/SAM/SMN
DMG:39 Delay:236 Latent effect: DMG:43 DEX+5 / 4MP/3sec
Rune Rod Lv.70 WHM/BLM/SMN
DMG:26 Delay:288 Latent effect: Attack+10 Healing magic skill +6 / 4MP/3sec
Rune Bow Lv.73 WAR/RDM/THF/PLD/DRK/BST/RNG/SAM/NIN
DMG:39 Delay:360 / 4MP/3sec
Rune Arrow Lv.70 WAR/BLM/RDM/THF/PLD/DRK/BST/BRD/RNG/SAM/NIN/SMN
DMG:32 Delay:120 Latent effect: VIT+1 Ranged Attack+10 / 1MP/3sec
Arcane Flowerpot / Adaman Nugget / Cermet Chunk /
Fire Cluster / Earth Cluster / Wind Cluster / Water Cluster / Light Cluster
Ice Cluster / Dark Cluster / Lightning Cluster
For example : I went to Dangruf Wadi with a level 50 friend at level 7 (if you have alts you can do it more than once a day) and had him cast sneak/invisible on me the whole way. I gave the machine my password, then traded it a Red Chip and an Infinity Core. It gave me 8xCermet Chunks...which go for 15k each on my server. I sold them for a profit of 50k. I paid 50k for the core and 21k for the chip... net profit : 50k in a run from Bastok Markets to Dangruf Wadi (10 mins or less).
Another further example : I went to Gusgen Mines afterwards, about a 10-15 minute walk from Dangruf Wadi, or a 5-10 minute choco ride from Bastok... I used a Yellow Chip and Infinity Core this time, getting 2 adaman nuggest in return. which is 100-120k on my server. So, profit was about 30k... I told someone about this who was a level 50smn/25whm and they sneaked/invisible'd me the whole way, I was level 7 at the time, so it is possible to do this with your mules or any low level character as well.
*FYI: Infinity Cores can also be gotten from CoP Bastok, Sandoria and Windhurst. (saves cash if you're high enough level to be there)
Good luck in your journeys,