diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/Config_Changes.md | 3 | ||||
| -rw-r--r-- | docs/G-Codes.md | 6 | ||||
| -rw-r--r-- | docs/Pressure_Advance.md | 16 |
3 files changed, 8 insertions, 17 deletions
diff --git a/docs/Config_Changes.md b/docs/Config_Changes.md index b5640587..f2a5c3c9 100644 --- a/docs/Config_Changes.md +++ b/docs/Config_Changes.md @@ -10,6 +10,9 @@ All dates in this document are approximate. chip id by default. Update the "serial" setting in the "mcu" config section accordingly. +20191121: The pressure_advance_lookahead_time parameter has been +removed. See example.cfg for alternate configuration settings. + 20191112: The tmc stepper driver virtual enable capability is now automatically enabled if the stepper does not have a dedicated stepper enable pin. Remove references to tmcXXXX:virtual_enable from the diff --git a/docs/G-Codes.md b/docs/G-Codes.md index 7cd4b02b..ad5481b1 100644 --- a/docs/G-Codes.md +++ b/docs/G-Codes.md @@ -156,9 +156,9 @@ The following standard commands are supported: Sets the target temperature for a heater. If a target temperature is not supplied, the target is 0. - `SET_PRESSURE_ADVANCE [EXTRUDER=<config_name>] [ADVANCE=<pressure_advance>] - [ADVANCE_LOOKAHEAD_TIME=<pressure_advance_lookahead_time>]`: - Set pressure advance parameters. If EXTRUDER is not specified, it - defaults to the active extruder. + [SMOOTH_TIME=<pressure_advance_smooth_time>]`: Set pressure advance + parameters. If EXTRUDER is not specified, it defaults to the active + extruder. - `STEPPER_BUZZ STEPPER=<config_name>`: Move the given stepper forward one mm and then backward one mm, repeated 10 times. This is a diagnostic tool to help verify stepper connectivity. 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 |