Basic question on input shaping

rex_sl

Hello,

I installed rrf3.5rc2 and have 2 questions

L-factor from 0.01 to 1. what is high and what is low value. Is 0.01 lowest reduction or 1? Is 0.25 reducing the value on 25% that i have 75 % left or does it reduce to 25%. Thats is absolutely not clear for non native english people.

Damping factor same question. If the shaper is too much. Is 0.01 the smallest amount of shaping or 1?

Thank you so much

oliof

@rex_sl for damping factor, lower is less. 0 is likely a better default than 0.1

droftarts

@rex_sl The M593 L parameter isn't a range between 0 and 1, it is the minimum acceleration at which input shaping is applied. As the default is 10mm/s^2, this should generally fall below what most 3D printers have set in their config.g with M201.

Sorry! I didn't spot you were on 3.5.0-rc2.

Ian

dc42

@droftarts said in Basic question on input shaping:

@rex_sl The M593 L parameter isn't a range between 0 and 1, it is the minimum acceleration at which input shaping is applied. As the default is 10mm/s^2, this should generally fall below what most 3D printers have set in their config.g with M201.

Ian

That's no longer correct for 3.5.0RC2.

droftarts

@rex_sl From the release notes, the M593 L factor is described as:

... the minimum fraction of the original acceleration or feed rate to which the acceleration or feed rate may be reduced in order to apply input shaping. The default is 0.25 and the acceptable range is 0.01 to 1.0.

ie if the commanded feedrate is F1000, L0.25 would allow the feedrate to reduce to F250, while L0.75 would only allow it to reduce to F750. So the least amount of reduction of acceleration or feed rate is from the highest L value.

I have updated the M593 Gcode dictionary entry to show this has changed in RRF 3.5.0-rc.2.

Ian