I just got the Duet3D Accelerometer installed, and in the process of playing with it, I've noticed very inconsistent results in the data collected without any shaping applied. In the interest of taking a slightly scientific approach to this problem, I ran the following move several times with different number of samples:
G1 X45 Y45 G4 S3 M956 P0 S4000 A1 F"9-XY45-135-0-none.csv" G4 P10 G1 X135 Y135 F20000
Here are the outputs for the different runs:
S500:
S1000:
S2000:
S2500:
S3000:
S4000:
Here is the summary of peak frequency for each axis at each resolution:
As you can see the amplitude changes a lot with each increase in resolution, and the overall results seem to change a lot with results until I'm above S3000.
I'm not sure what to do with the results at this point. The difference in peak between X and Y does make sense for my printer layout (Dual Wire Gantry, Bowden), but the highly variable results are concerning. Is this going to strongly affect the output of applying input shaping during real prints?