Extrusion Gaps
I have been getting gaps in the same part that appear periodically. At first I thought the gaps might be from a slicer setting for coasting but when I checked the seam location the gaps are too far away for it to be this. I also added some bowden tube to help guide the filament and I thought it might be the friction from this, but everything seems to be moving smoothly. This print was run after I increased the temp from 205 to 210.
Extruder: Bondtech LGX Lite
Amperage: 0.707 (recommeded per RatOS)
Printer: RR500 3.1
Hot End: Phaetus Rapido UHF
Material: Overture PLA
Temperature: 210
I am at a bit of a loss and I am not sure what is causing this.
Solution:Jump to solution
that is the correct setting indeed, that value depending on your filament, hotend and nozzle size/style
10 Replies
seems like you are running too high volumetric flow rate for the filament and the hotend cant keep up, causing the extruder motor to skip steps and lose pressure temporarly
try setting a lower max volumetric flow limit in your slicer
I will have to check my settings when I get home. I am running OrcaSlicer, so would this be flow ratio setting?
Quality Tab > Walls and Surfaces Header
Or would it be in the filament settings?
Material Settings > Filament Tab > Flow Ratio and Pressure Advance > Flow Ratio
Two things that did change since posting this: I upped the amperage to 0.85A and I added in an Infinity Flow filament feeder which should eliminate some of the friction that was coming from the bowden tube. I have some looser bowden tube on the way as well that I will be replacing the existing tube with.
I don't think it is either of those settings. In SuperSlicer it is called
Volumetric auto-speed:
I think that is the similar setting in Orca Slicer
This is not from my home profile since I am at work.
this is not the correct option, it is set in the filament tab per filament
Solution
that is the correct setting indeed, that value depending on your filament, hotend and nozzle size/style
Thank you! I realized there is also an option to calibrate this in OrcaSlicer so I will be doing that as well so that I can get it dialed in.
I have a long print running now but I will post the results of the dest once I am able to run it.
@DocDoyle VC3.1 400/500/RatEnder So, I was able to run this test last night. The default profile that I had was running this setting at 200 mm/s for some reason. I ran some tests and brought it down to 21 mm/s. I ran a print much shorter print that I have had this gap issue with and it succeeded with no issues.
Going to fire up the 44 hour print again this evening after my new bowden tube with the bigger ID comes in.
Note that these are different things! 200mm/s is the linear speed the toolhead will move at, the ~20mm/s^3 is the volume of flow going through the nozzle
These are linked to eachother by layer thickness and height, 25mm/s^3 of volume is about 250/300mm/s with the average 0.4 nozzle
I am running a 0.6 since its a bigger build area and a large print
Do you want me to post some pics of the test pieces that I printed and the settings that I used?