Weapon grinding

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Weapon grinding is the process of strengthening weapons, increasing their ATP/TP and PP by reasonable amounts. For a list of the stat increases by weapon type and maker, please see Weapon grinding (Stat Increases).

All weapons start at 0, and can be ground up to an initial maximum level of 10. The downside to grinding is that, if grinding fails, the weapon will be reset to zero and will lose one maximum grind chance.

How to Grind

In order to grind, you must first have Grinders with which to grind the weapon. The grinder must be of equal or greater Weapon Rank compared to the weapon you wish to grind (e.g. you can grind a C-rank weapon with any grade of grinder, while S-rank weapons can only be ground using S-rank grinders). Different Grinders of the same Rank may be of different quality (represented by a number e.g. +1 or +4), thus affecting the success rate of the grinding. If you have the grinders, you must go to the Grinding Shop of the manufacturer of the weapon you wish to grind. For example, G.R.M. weapons can be ground at the G.R.M. Shop in Holtes City west on Parum, and Yohmei weapons are ground at the Yohmei Shop in Ohtoku City on Neudaiz. Kubara weapons need to be taken to the Junk Shop on the second floor of the GUARDIANS Colony to be ground. Also, remember to remove the weapon from the action palette before attempting to grind it. If you do not do so, you will not be able to grind the weapon.

A freshly unground weapon has a value of 0/10, as seen in the upper-right corner of the weapon's stat pane. The first number is the weapon's current grind value, which will increase with successful grind attempts. The second number is the maximum possible grind value. If a grind attempt fails, the maximum value will decrease by one and the current grind value will be reset to zero. For example, a new weapon ground once successfully will have a value of 1/10, but if the next attempt fails it will have a value of 0/9.

Grinding Success Odds

The odds for the grinding process to succeed are dependent on the following factors:

  • One's Photon Fortune
  • The current grind level of the weapon (ranging from 0 to 9 for grinding to still be possible)
  • The quality level of the grinder itself (ranging from +1 to +10)

Although alot of people think its true a players level DOES NOT affect a players chance at success

Just before the grind, this chances for success is described by the person behind the counter, when asking for confirmation. The possible messages and shorthand notations that will be used for the tables below are as follows. Please note that these are merely an indication, and that the actual chances DO vary even within these categories! Also note that "Guaranteed" is NOT 100%.

Shorthand In-game message Actual chance
Guaranteed There is no chance of failure. 100.0%
Very High The probability of success seems very high. 80.0%~99.9%
High The probability of success seems high. 60.0%~79.9%
Fifty-Fifty The probability of success seems to be about fifty-fifty. 40.0%~59.9%
Low The probability of success seems low. 20.0%~39.9%
Very Low The probability of success seems very low. 0.1%~19.9%
No Chance There is no chance of success. 0.0%

Based on a Japanese guide and available knowledge regarding rates, it can be concluded that 'L1' and 'L2' Photon Fortune increase grinding success by at most 3.0%, while the increment for 'L3' could have a range from 5.0 to 7.0%.

Online Weapon Grinding Success Rate Tables

C-rank weapons

Photon fortune LV0
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 High High High High High High High High Very High Very High
5 -> 6 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High High
6 -> 7 Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High
8 -> 9 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
9 -> 10 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
Photon fortune LV1
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 High High High High High High High High Very High Very High
5 -> 6 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High Very High
6 -> 7 Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Low Low Low Low Low Fifty-Fifty Fifty-Fifty High High
8 -> 9 Very Low Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
9 -> 10 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
Photon fortune LV2
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Guaranteed Guaranteed Guaranteed
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 High High High High High High High Very High Very High Very High
5 -> 6 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High High Very High
6 -> 7 Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
8 -> 9 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
9 -> 10 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
Photon fortune LV3
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Guaranteed Guaranteed
3 -> 4 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 High High High High High High Very High Very High Very High Very High
5 -> 6 Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High High High Very High
6 -> 7 Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High
7 -> 8 Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
8 -> 9 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
9 -> 10 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High

B-rank weapons

Photon fortune LV0
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 High High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 Fifty-Fifty High High High High High High High High Very High
5 -> 6 Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High
6 -> 7 Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
8 -> 9 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
9 -> 10 No Chance Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty High
Photon fortune LV1
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 High High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 Fifty-Fifty High High High High High High High Very High Very High
5 -> 6 Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High
6 -> 7 Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
8 -> 9 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
9 -> 10 Very Low Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty High
Photon fortune LV2
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 High Very High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 High High High High High High High High Very High Very High
5 -> 6 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High Very High
6 -> 7 Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High
7 -> 8 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
8 -> 9 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
9 -> 10 Very Low Very Low Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
Photon fortune LV3
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Guaranteed Guaranteed
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
4 -> 5 High High High High High High High Very High Very High Very High
5 -> 6 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High Very High
6 -> 7 Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
8 -> 9 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
9 -> 10 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High

A-rank weapons

Photon fortune LV0
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 High High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 Fifty-Fifty High High High High High High High High Very High
4 -> 5 Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High
5 -> 6 Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
6 -> 7 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
7 -> 8 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
8 -> 9 Very Low Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty High
9 -> 10 No Chance Very Low Very Low Very Low Very Low Low Low Low Fifty-Fifty Fifty-Fifty
Photon fortune LV1
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 High High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 Fifty-Fifty High High High High High High High Very High Very High
4 -> 5 Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High
5 -> 6 Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
6 -> 7 Very Low Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
7 -> 8 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
8 -> 9 Very Low Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty High
9 -> 10 No Chance Very Low Very Low Very Low Low Low Low Low Fifty-Fifty High
Photon fortune LV2
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 High High High High High High High High Very High Very High
4 -> 5 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High Very High
5 -> 6 Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
6 -> 7 Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
8 -> 9 Very Low Very Low Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
9 -> 10 No Chance Very Low Very Low Very Low Low Low Low Low Fifty-Fifty High
Photon fortune LV3
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
3 -> 4 High High High High High High High Very High Very High Very High
4 -> 5 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High Very High
5 -> 6 Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
6 -> 7 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
7 -> 8 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
8 -> 9 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
9 -> 10 No Chance Very Low Very Low Very Low Low Low Low Fifty-Fifty Fifty-Fifty High

S-rank weapons

Photon fortune LV0
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
1 -> 2 High High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High High
3 -> 4 Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
4 -> 5 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High
5 -> 6 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
6 -> 7 No Chance Very Low Very Low Very Low Low Low Low Low Fifty-Fifty High
7 -> 8 No Chance No Chance Very Low Very Low Very Low Low Low Low Fifty-Fifty Fifty-Fifty
8 -> 9 No Chance No Chance No Chance No Chance Very Low Very Low Very Low Low Low Fifty-Fifty
9 -> 10 No Chance No Chance No Chance No Chance No Chance Very Low Very Low Very Low Low Fifty-Fifty
Photon fortune LV1
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
1 -> 2 High High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High Very High
3 -> 4 Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
4 -> 5 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
5 -> 6 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
6 -> 7 No Chance Very Low Very Low Very Low Low Low Low Fifty-Fifty Fifty-Fifty High
7 -> 8 No Chance No Chance Very Low Very Low Very Low Low Low Low Fifty-Fifty Fifty-Fifty
8 -> 9 No Chance No Chance No Chance No Chance Very Low Very Low Very Low Low Low Fifty-Fifty
9 -> 10 No Chance No Chance No Chance No Chance No Chance Very Low Very Low Very Low Low Fifty-Fifty
Photon fortune LV2
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
1 -> 2 High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High High Very High
3 -> 4 Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High
4 -> 5 Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
5 -> 6 Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High
6 -> 7 No Chance Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty High
7 -> 8 No Chance Very Low Very Low Very Low Very Low Low Low Low Fifty-Fifty High
8 -> 9 No Chance No Chance No Chance No Chance Very Low Very Low Very Low Low Fifty-Fifty Fifty-Fifty
9 -> 10 No Chance No Chance No Chance No Chance No Chance Very Low Very Low Low Low Fifty-Fifty
Photon fortune LV3
Grind Grinder
+1 +2 +3 +4 +5 +6 +7 +8 +9 +10
0 -> 1 Very High Very High Very High Very High Very High Very High Very High Very High Guaranteed Guaranteed
1 -> 2 Very High Very High Very High Very High Very High Very High Very High Very High Very High Very High
2 -> 3 Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High High High Very High
3 -> 4 Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High High High
4 -> 5 Very Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
5 -> 6 Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty Fifty-Fifty High High
6 -> 7 Very Low Very Low Very Low Low Low Low Low Fifty-Fifty Fifty-Fifty High
7 -> 8 No Chance Very Low Very Low Very Low Low Low Low Low Fifty-Fifty High
8 -> 9 No Chance No Chance No Chance No Chance Very Low Very Low Low Low Fifty-Fifty Fifty-Fifty
9 -> 10 No Chance No Chance No Chance No Chance No Chance Very Low Very Low Low Low Fifty-Fifty


Gameplay

Photon arts | Skills | Bullets | TECHNICs | Item synthesis | Weapon grinding | Set bonuses | Partner machines | Elements | Status effects | Stats | Formulae | Enemies | Enemy spawn charts | Photon Fortune

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