Here are the settings my 300A had at some point in time. Use at your own risk.
Code:
0.0 0
0.1 4
0.2 0.0
0.3 0000
0.4 0001
0.5 1
0.6 0000
0.7 0.0
0.8 200.0
0.9 ----
0.10 0.5
0.11 5.0
0.12 0000
0.13 20.0
0.14 60.0
0.15 ----
0.16 8.0
0.17 1110
0.18 0
1.0 0
1.1 7.0
1.2 0
1.3 50.00
1.4 220
1.5 0.0
1.6 0.0
1.7 0.0
1.8 0.0
1.9 0.0
1.10 0.0
1.11 50.0
1.12 0.0
1.13 ----
1.14 0
1.15 220
1.16 50.00
1.17 6.40
1.18 1400
1.19 2.95
1.20 0
1.21 0001
1.22 0.30
1.23 0010
1.24 1.790
1.25 0.075
1.26 14.10
1.27 0.06
1.28 ----
1.29 1.00
1.30 ----
2.0 0.0
2.1 5.2
2.2 4.0
2.3 20.0
2.4 0.0
2.5 200.0
2.6 0000
2.7 0.10
2.8 0
2.9 0000
2.10 0.0
2.11 10.0
2.12 ----
3.0 1
3.1 2
3.2 3
3.3 6
3.4 0
3.5 16
3.6 5.00
3.7 10.00
3.8 2.0
3.9 110
3.10 2.0
3.11 ----
4.0 0
4.1 0.50
4.2 0.0
4.3 0
4.4 3.00
4.5 0.1
4.6 0.0
4.7 50.0
4.8 0.50
4.9 0.50
4.10 10.00
4.11 160
4.12 80
4.13 110
4.14 2
4.15 ----
4.16 0.0
4.17 5.0
4.18 5.0
4.19 5.0
4.20 5.0
4.21 5.0
4.22 5.0
4.23 10.00
4.24 350
4.25 60
4.26 0010
4.27 0.5
4.28 ----
5.0 0000
5.1 35.00
5.2 15.00
5.3 3.00
5.4 20.00
5.5 25.00
5.6 30.00
5.7 35.00
5.8 40.00
5.9 10.0
5.10 10.0
5.11 10.0
5.12 10.0
5.13 10.0
5.14 10.0
5.15 10.0
5.16 10.0
5.17 0000
5.18 0000
5.19 0.0
6.0 ----
6.1 0
6.2 2.0
6.3 1
6.4 1
6.5 0.0
6.6 0.0
6.7 0.0
6.8 0.0
6.9 1.00
6.10 1.00
6.11 1.00
6.12 3
6.13 1
6.14 1700
6.15 0
6.16 0
6.17 1000
6.18 100
6.19 ****
7.0 1000
7.1 10.00
7.2 0.0
7.3 10.0
7.4 10.0
7.5 10.0
7.6 10.0
7.7 10.00
7.8 ----
8.0 0020
8.1 0000
8.2 0.0
8.3 0.0
8.4 10.00
8.5 0.0
8.6 10.00
8.7 1.00
8.8 10.0
8.9 0.0
8.10 0.0
8.11 0.0
8.12 10.00
8.13 0.0
8.14 ----
9.0 0014
9.1 0
9.2 5
9.3 0010
9.4 10.0
9.5 1.00
9.6 0
9.7 0.0
C.0 190
C.1 370
C.2 180
C.3 ----
C.4 3333
C.5 0010
C.6 0000
C.7 0000
C.8 100
C.9 1.00
C.10 1.00
C.11 1.00
C.12 0
C.13 2017
Note that I suspect the value for setting 2.1 ("Input upper limit voltage") was set to 5.2 as a "fix" for some faulty component from the factory, I'm pretty sure this value should be set to 10.0 .
I also changed the values for 0.10 ("Acc time 1") and 0.11 ("Dec time 1"). I'm guessing these wouldn't have anything to do with your issue, so I wouldn't suggest changing them from what you have.
I also changed 0.8 ("The upper limit frequency") and 2.5 ("Frequency with the max setting"), but I didn't change them very much.
A short video I recorded a couple years ago... (phew, seems like so long ago!) This is with a 1/2" bit.
https://www.youtube.com/watch?v=_2D2uDARWRM
I'm sure the machine is capable of more, I don't think I tweaked anything other than the width of cut. (edit: actually, I might not have even messed with that. I was using SolidCAM at the time and the version I was using has some kind of automatic feeds and speeds generator built in.)