Uploaded February 2025 | Updated September 2026, 2 weeks ago
PA has been such a problem transitioning from low speed to high. Non-linear PA is meant to address dynamic issues printing, when the linear advance is not so linear.
Custom Skew Cube + Layer stack test. 60x60x60, top hashes 4mm.
ABS. 275C, 0.4 TC nozzle, .25 layer height, 800mms outer-inner walls at 30k acceleration, 600mms infill at 50K acceleration, top skin 300mms at 30k acceleration. All at 60 square corner velocity. Part cooling at 70%, overhangs 100%, bridges 40%, top solid 40%. 40 grams of filament in 17 minutes(141 grams/hour).
Upping acceleration on external and internal walls from 30k to 50k reduces overall time by 15 seconds.
Top rectangles are more rounded than I like to see, SCV is too high, but we need higher SCV to decrease print time.
Slicer capped at 70mms3 flow, but there were many instances where the flow was greater than 120mms3. So maybe the flow shown on Klipper screen takes into account PA move speed?
Non-linear advance settings:
pressure_advance_model: tanh
linear_advance: 0.015
linear_offset: 0.00
linearization_velocity: 5.0
Are they correct, no. There is still some issues with infill break up. The infill is not as clean as it should be, but this is really not a bad print by any means!
These types of tests are needed in order to get some idea of what will happen on a functional print where the hammer is put down.
* sorry for the vibration in the video. The printer is in my garage, on top of a table that rocks terribly. I have to stand on a step stool to reach the top! The bed is stiff enough that the printer rocking has minimal effect on the prints.
PA has been such a problem transitioning from low speed to high. Non-linear PA is meant to address dynamic issues printing, when the linear advance is not so linear.
Custom Skew Cube + Layer stack test. 60x60x60, top hashes 4mm.
ABS. 275C, 0.4 TC nozzle, .25 layer height, 800mms outer-inner walls at 30k acceleration, 600mms infill at 50K acceleration, top skin 300mms at 30k acceleration. All at 60 square corner velocity. Part cooling at 70%, overhangs 100%, bridges 40%, top solid 40%. 40 grams of filament in 17 minutes(141 grams/hour).
Upping acceleration on external and internal walls from 30k to 50k reduces overall time by 15 seconds.
Top rectangles are more rounded than I like to see, SCV is too high, but we need higher SCV to decrease print time.
Slicer capped at 70mms3 flow, but there were many instances where the flow was greater than 120mms3. So maybe the flow shown on Klipper screen takes into account PA move speed?
Non-linear advance settings:
pressure_advance_model: tanh
linear_advance: 0.015
linear_offset: 0.00
linearization_velocity: 5.0
Are they correct, no. There is still some issues with infill break up. The infill is not as clean as it should be, but this is really not a bad print by any means!
These types of tests are needed in order to get some idea of what will happen on a functional print where the hammer is put down.
* sorry for the vibration in the video. The printer is in my garage, on top of a table that rocks terribly. I have to stand on a step stool to reach the top! The bed is stiff enough that the printer rocking has minimal effect on the prints.
