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muo
 muo
(@muo)
Estimable Member
New Filament Calibration

just wanted to know what you guys use to find near good/perfect settings for a new filament?

The new filament i have gotten, i have been able to use it a lot better now but i am trying to create a more effective and faster way to get down to the right settings. For example like create a 1) Temp tower then 2) Retraction Cubes 3) etc......., any printing i can run to get down to right settings or maby any physical/visual testing of the print to see if it holds. Any thing that works for you or that would be usefull? thanks!

Publié : 01/09/2019 6:08 pm
bobstro
(@bobstro)
Illustrious Member
RE: New Filament Calibration

With a new brand and type of filament, I try to do:

  1. Measure filament at 3 points minimum and average, enter diameter in filament settings.
  2. Linear Advance (K-factor) calibration. Set this in filament startup g-code.
  3. Print 20mm cube with 2 perimeters, no top layers and no infill. Measure and compare to actual wall thickness (read from gcode - 2Xperimeter thickness) and adjust the extrusion multiplier in filament settings. Measure at the center of each side (to avoid irregular corners) and only at the very top (to avoid 1 irregular line throwing it off) I find this helps a lot of with over-extrusion and z-seam appearance. Lots of variation on this, but after much research, this is giving me good results.
  4. Depending on the filament, tweak max volumetric rate in filament settings. This is important if I get extruder clicks mid-print.
  5. Finally, if time allows, I may try a temp tower. I rarely see a lot of difference in the towers. I find the Atom 80 degree overhang test more informative, but it can only test one temp at a time. It's a good way to see overhang performance, which is where heat matters the most IME. Otherwise, I just go as cool as possible for PLA and appearance, as hot as possible for strong parts.

Stringing is usually a question of temps and cooling. I just adjust those depending on the print and don't try it per-filament. I find very little (0.2-.4mm) retraction and equally little (0.2-0.4mm) z-lift helps with stringing. If your filament is well calibrated, you shouldn't need extreme retraction and z-lift settings.

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Publié : 01/09/2019 9:02 pm
Terb
 Terb
(@terb)
Active Member
RE: New Filament Calibration

Wow, good info!  Just curious why you two the two wall thickness calibration cube as opposed to a single wall?  

 

For my calibration I normally start with a single wall calibration cube and then a temp tower.  Sometimes i do linear advance but normally I just set this by filament type though. PETG vs. PLA etc. 

Publié : 02/09/2019 4:51 am
bobstro
(@bobstro)
Illustrious Member
RE: New Filament Calibration
Posted by: Terb0Tron

Wow, good info!  Just curious why you two the two wall thickness calibration cube as opposed to a single wall?  

The theory is that more walls will give a truer average. I've read some recommending 3 or more. 2 works well for me. 

I am sometimes surprised by the Linear Advance results, but most are close to the Prusa settings for each type.

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Publié : 02/09/2019 7:33 am
Shwalamazula
(@shwalamazula)
New Member
RE: New Filament Calibration

I know it is an old thread, but the info is still sound.

I just wanted to chime in that when I get a new filament, I will first use the Prusa generic profile for the filament type. I found some PETG filaments will ooze differently from color to color from the same supplier. So I will run a temp tower first to get my preferred look/base settings. Once I have my preferred temperature, I will run a wall thickness cube to adjust the flow. After all of that, I will print off a calibration kitty to make sure there isn't any crazy stringing (then I'll adjust settings like z-hop and retraction, if needed for stringing).

Publié : 19/04/2020 10:58 pm
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