M566 P1 vs pressure advance

T3P3Tony

@alexth is this behaviour different in RRF3.3?

AlexTh

@t3p3tony I am a new RRF user. I did not install other versions.

T3P3Tony

@alexth the board you had probably had an older version initially. Maybe @jay_s_uk can advise as this is a mellow board not a duet.

PCR

@alexth you have to tune PA with the specific jerk settings and policy.

AlexTh

@pcr I can't find the PA value, because the perimeter prints well, and only the beginning of the line with high underextrusion.

PCR

@alexth which printer? A PA value of 0,1 is quite high

PCR

@pcr for a direct drive

AlexTh

@PCR
Flying Bear 5
Long direct
~10 cm

PCR

@alexth start with S0 and increase?

AlexTh

@pcr I've tried different values. Can't set up.

But I'll try again

AlexTh

@pcr M572 D0 S0.07 is a more appropriate value, there is no underextrusion at the beginning of the line, but the outer corners of the model are slightly outward. For the perimeter, this value is not ideal.

PCR

@alexth please print a tuning tower from S0 to S0.1 and show the pictures

AlexTh

@pcr Give me a link to the test

PCR

@alexth https://duet3d.dozuki.com/Wiki/Pressure_advance
or
https://forum.duet3d.com/topic/25764/pressure-advance-tuning-with-conditional-g-code?_=1635840827943