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| author | Kevin O'Connor <kevin@koconnor.net> | 2019-11-05 16:21:06 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2019-11-21 13:18:19 -0500 |
| commit | 6d0c55b6c1adcef3d6d64d613a486f1f99e0c6e0 (patch) | |
| tree | 2cbd09210bdd1fb906c02ce713472e0c448c025e /docs/Pressure_Advance.md | |
| parent | da06e185fbcf120a73458018116af38576689496 (diff) | |
| download | kutter-6d0c55b6c1adcef3d6d64d613a486f1f99e0c6e0.tar.gz kutter-6d0c55b6c1adcef3d6d64d613a486f1f99e0c6e0.tar.xz kutter-6d0c55b6c1adcef3d6d64d613a486f1f99e0c6e0.zip | |
extruder: Initial support for "smoothed pressure advance"
Support averaging the extruder position over a time range to "smooth
out" the velocity changes that occur during pressure advance.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'docs/Pressure_Advance.md')
| -rw-r--r-- | docs/Pressure_Advance.md | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/docs/Pressure_Advance.md b/docs/Pressure_Advance.md index f3f62221..617dfbd7 100644 --- a/docs/Pressure_Advance.md +++ b/docs/Pressure_Advance.md @@ -22,12 +22,11 @@ Use a slicer to generate g-code for the large hollow square found in speed (eg, 100mm/s), zero infill, and a coarse layer height (the layer height should be around 75% of the nozzle diameter). -Prepare for the test by issuing the following G-Code commands: +Prepare for the test by issuing the following G-Code command: ``` SET_VELOCITY_LIMIT SQUARE_CORNER_VELOCITY=1 ACCEL=500 -SET_PRESSURE_ADVANCE ADVANCE_LOOKAHEAD_TIME=0 ``` -These commands make the nozzle travel slower through corners and they +This command makes the nozzle travel slower through corners to emphasize the effects of extruder pressure. Then for printers with a direct drive extruder run the command: ``` @@ -118,17 +117,6 @@ Important Notes enough torque to push the required filament. If this occurs, either use a lower acceleration value or disable pressure advance. -* The pressure_advance_lookahead_time parameter controls how far in - advance to check if a head slow-down is immediately followed by a - speed-up - it reduces pointless pressure changes in the head. It is - recommended to follow the steps above so that it is set to zero - during tuning and to use the default (0.010) during normal prints. - It is possible to tune this setting - higher values will reduce the - amount of pressure change in the nozzle during cornering, but - setting it too high can cause blobbing during cornering. (Tuning - this value is unlikely to impact ooze.) The default of 10ms should - work well on most printers. - * Once pressure advance is tuned in Klipper, it may still be useful to configure a small retract value in the slicer (eg, 0.75mm) and to utilize the slicer's "wipe on retract option" if available. These |