Commits on Sep 21, 2024

1. Add printer definitions for Sovol SV08. …

   The SV08 (or SV-08; nomenclature is not completely consistent)
   is a relatively new printed based on Voron 2.4, running Klipper.
   This adds printer, extruder and material definitions for it,
   based on the voron2_base definitions plus Sovol's published profiles
   for Orca Slicer:
   
     https://drive.google.com/drive/folders/1KWjLxwpO_9_Xqi_f6qu84HRxZi26a_GN
   
   Unfortunately, the included STL model for the platform does not have
   texture coordinates, so we cannot use the platform texture (unless someone
   goes to add them manually or otherwise adjusts the model).
   
   The following settings were not carried over, mostly because I could not
   find any obvious equivalent in Cura:
   
     - Machine:
       "retract_before_wipe": [ "0%" ],
       "machine_max_acceleration_extruding": [ "20000" ],
       "machine_max_acceleration_retracting": [ "5000" ],
       "retract_length_toolchange": [ "2" ],
       "wipe_distance": [ "2" ],
       "retract_lift_below": [ "343" ],
       "thumbnails_format": "PNG",
       "before_layer_change_gcode": "TIMELAPSE_TAKE_FRAME\nG92 E0",
   
     - Filament (using ABS as an example; the exact values differ between
       the four material profiles):
       "nozzle_temperature_range_low": [ "190" ],
       "nozzle_temperature_range_high": [ "250" ],
       "overhang_fan_threshold": [ "25%" ],
       "temperature_vitrification": [ "60" ],  # Only used for arranging.
       "close_fan_the_first_x_layers": [ "3" ],
       "full_fan_speed_layer": [ "0" ],  # Inconsistent; effectively 4.
       # Enclosure fan (M106 P3 commands)
       "activate_air_filtration": [ "1" ],
       "complete_print_exhaust_fan_speed": [ "60" ],
       "during_print_exhaust_fan_speed": [ "100" ],
   
     - Process: A bunch (e.g. bridge_flow, elephant_foot_compensation,
       overhang_1_4_speed, etc. etc.), but it's unclear how many are
       printer-specific and how many are just Orca defaults where Cura wants
       to do things differently.
   
   The start and end G-code are mostly copied over verbatim, except that it
   leaves the printer in relative coordinate mode and Cura does not set this
   explicitly back to absolute, so we need an explicit G90 at the end. (Also,
   there seems to be a Klipper issue where G90 does not reset extrusion to
   absolute as well, so we need to send an explicit M82.) We give
   EXTRUDER_TEMP= and BED_TEMP= as parameters to the START_PRINT macro; the
   Sovol stock macros ignore these, but the popular mainline Klipper
   installation can use this to e.g. bed mesh at the correct temperature.
   
   Unfortunately, Cura chooses SS_ as prefix instead of SV08_. I don't know
   if there is a way to override this; the other Sovol printers seem to have
   the same issue.
   
   I've tested this with the standard 0.4mm nozzle and ABS/PLA, using the
   Moonraker plugin. PETG and TPU are untested, in part because the current
   nozzle is said to be unsafe for PETG. The time estimates from Cura are not
   all that good, but klipper_estimator helps. (The Klipper object exclusion
   plugin is also recommended, as it allows the printer to bed mesh a smaller
   area.)
   
   Future work would include supporting the 0.2mm, 0.6mm and 0.8mm nozzles.
   There are separate profiles for them, with different layer height, support
   settings, print speeds, etc. -- and then there is a specific PLA/0.2mm
   profile with lower printing speed and higher fan settings. Also, it would
   be really good to support the enclosure fan (M106 P3, known as
   exhaust_fan in Orca) for printing ABS; it's possible that something could
   be done using the Cura fan control plugin, but it would be better to
   simply have it right in the filament settings. Similarly, the ABS/PETG
   profiles want to turn off the fan entirely the first three layers
   (to improve adhesion), but Cura can only ramp linearly starting from the
   first layer, not hold the first few layers constant.

   

   Steinar H. Gunderson authored and sesse committed Sep 21, 2024
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