Firmware flow rate change?
i am trying to do this calibration from the following video(around 2:00 min to 4:00 min)
this is mainly to test out if you extrude 100mm filament you get 100mm filament out the nozzle.
in the vid he uses S3D to get the E-steps in the firmware from S3d and then commit those changes back into the firmware after calculation, how can that be done with PSlicer 2.0? or only option we have is changing the extrusion multiplier in PSLicer 2.0?
RE: Firmware flow rate change?
Linear Advance is NOT extruder ratio. Two separate and totally different mechanisms at play.
In a MK3 - extruder ratio is as simple as marking 100 mm on the filament and manually extruding 100 mm using Settings/Move Axis/Move E ... if moving the E-Axis 100 mm uses up 100 mm of filament, you are good. If it uses more or less, you have an extrusion factor to enter into the slicer.
Another way is to print a cube in vase mode and measure the wall thickness. It should match the setting to external perimter (0.45 mm is common).
Keep in mind filament that isn't 1.75 mm in diameter ruins all this work, so you need to keep filament diameter in mind, too.
Linear advance is a way to adjust pressure inside the nozzle during print moves.
Prusa has an obtuse way of measuring it: https://help.prusa3d.com/article/t5w9VsdVai-linear-advanced
Marlin folks have a better way (simpler): http://marlinfw.org/docs/features/lin_advance.html
RE: Firmware flow rate change?
Linear Advance is NOT extruder ratio. Two separate and totally different mechanisms at play.
In a MK3 - extruder ratio is as simple as marking 100 mm on the filament and manually extruding 100 mm using Settings/Move Axis/Move E ... if moving the E-Axis 100 mm uses up 100 mm of filament, you are good. If it uses more or less, you have an extrusion factor to enter into the slicer.
Another way is to print a cube in vase mode and measure the wall thickness. It should match the setting to external perimter (0.45 mm is common).
Keep in mind filament that isn't 1.75 mm in diameter ruins all this work, so you need to keep filament diameter in mind, too.
Linear advance is a way to adjust pressure inside the nozzle during print moves.
Prusa has an obtuse way of measuring it: https://help.prusa3d.com/article/t5w9VsdVai-linear-advanced
Marlin folks have a better way (simpler): http://marlinfw.org/docs/features/lin_advance.html
ya that was kinda my plan, in the video he does a the 100mm test then cube then linear advance. i was planning on doing them all my self but my confusion was more with S3D vs Pslicer software, in the video com port is used to update the firmware for the extruder setting with S3d since it did not take 100mm exact.
so my question is if i am over or under the 100mm mark what settings do i have to change in Prusa slicer 2.0 to compensate for the change, only one i could think of were extrusion ratio or retraction but not sure if those are correct settings? thanks!
RE: Firmware flow rate change?
You dont do that from Prusa Slicer, you use Pronterface for that. I believe its still included in the full install package but its been awhile since I grabbed it as I tend to get my slicer updates from github now.
RE: Firmware flow rate change?
gotcha thanks
RE: Firmware flow rate change?
RE: Firmware flow rate change?
For setting the extrusion steps in the firmware I followed this guide https://mattshub.com/2017/04/19/extruder-calibration/ which describes the steps with both S3D and Pronterface. The process is the same but PrusaSlicer doesn't have the built in COM window to send the individual commands which is why its bundled with Pronterface.
Once you have that fundamental step done then you can do individual filament tweaks as as Tim mentions.