I want to start a new thread here to seperated this Marlin version from the official preconfigured Marlin releases posted in the main thread. This version here is based on RCBugFix branch of Marlin, which means it has more bugs fixed than the RC releases, but there may be also new bugs in there. Plus, I added my advance feature already calibrated for the TAZ5 extruder. This leads to a significant print quality improvement in certain areas, see the pictures here for a comparison:
Picture 1: No active advance on the left, active advance feature on the right side - you can see the bleeding edges on the left one, while the right one is much more straight and has sharper corners. Second, you can see the rough area in the top infill in the left one, where the infill lines changes direction at the line ends. The right one is much smoother, have a look at the shiny areas.
Picture 2: Same thing, but with a metal ruler for comparison.
Picture 3 and 4: 3 is the one without active advance, 4 is with enabled advance. You can see the dimensional error due to the bleeding edges in 3, where 4 is damn close to the 20mm.
Both squares were printed with the exactly same gcode, all speeds set to 50mm/s and with 500mm/s² acceleration. Have in mind that your results on a stock TAZ at these speeds may vary as I have done the Openrail X & Y axis mod.
One important thing for all testers:
.) Be sure to disable all pressure control system in your slicer! For example: Extra start length after retract, coast at end, pressure advance and simmilar.
Changes to stock Marlin:
.) Advance feature integrated and calibrated for PLA
.) TAZ specific values added (steps/mm, …)
.) New value in 1.1 “Travel acceleration” set to 1200
.) Enabled FW retraction with my best values for that
.) Enabled SD Support (of course…)
.) Reduced extruder acceleration from 3000 to 2400. 3000 is TAZ 5 default, but thats to high. Extruder is missing steps, resulting in blobs when unretracting. 2400 is the highest safe value for my extruder.
.) Enabled filament change possibility
.) No “Lulzbot-specific” changes in this release (Boot logo and another font) - this is code where a lot of things are changing in a short time, it’s too much affort to implement this “unnecessary” extra code every time.
Have fun, try it at your own risk as always