Phone Accelerometer data and Input Shaping

[CNCModeller]

Hi All,
I've found an droid app called Resonance, it records vibration data and then provides analysis.

I've put my phone on my bed and these are the results

I've plumped for 25Hz for my M593 F25, but I don't really know what I'm looking at.

Edit. It's a polar printer so X and y are components of the bed rotation.

Any thoughts?

Many thanks
Barry M

[dc42]

Neat idea!

As you are only measuring the bed movement, I find it odd that X and Y are so different. The "Unadjusted displacement profile" only show significant ringing in X, so I think the X ringing frequency centred on 20Hz is the one you should focus on.

What movement command did you give it when you measured the acceleration?

[CNCModeller]

@dc42 It was printing my latest test print,

VID_20210602_175413.mp4

[dc42]

@cncmodeller IMO it's better to to a deliberate sharp movement, longer than the period of any resonance. See https://duet3d.dozuki.com/Wiki/Accelerometers#Section_Using_accelerometers but in your case I suggest G1 H2 Y moves covering about 90 degrees in place of the G1 moves in that example.

[CNCModeller]

@dc42 said in Phone Accelerometer data and Input Shaping:

@cncmodeller IMO it's better to to a deliberate sharp movement, longer than the period of any resonance. See https://duet3d.dozuki.com/Wiki/Accelerometers#Section_Using_accelerometers but in your case I suggest a G1 H2 Yxxx move covering about 90 degrees.

Thanks @dc42 , will do when this print has finished.

[CNCModeller]

@dc42 said in Phone Accelerometer data and Input Shaping:

@cncmodeller IMO it's better to to a deliberate sharp movement, longer than the period of any resonance. See https://duet3d.dozuki.com/Wiki/Accelerometers#Section_Using_accelerometers but in your case I suggest G1 H2 Y moves covering about 90 degrees in place of the G1 moves in that example.

Looks like 18Hz it is then...! 60deg bed rotation move triggered from my 12864 display

Screenshot_2021-06-02-18-28-04-548_com.morganandwife.vibration.jpg

Thanks for the insights @dc42

[celulari]

@cncmodeller Hi, nice find! can you share the link to the app? can't find it

[CNCModeller]

@celulari
This is the app, after an initial look I also upgraded to the paid version.

https://play.google.com/store/apps/details?id=com.morganandwife.vibration