Very bad surface quality (V-Minion, LGX Lite + Rapido 2+)
I recently assembled my first V-minion, standard kit but with a Rapido V2. Everything seems to be working properly, but I am getting very bad surface quality on the prints, as shown in the images.
I have done rotation distance calibration, and tested several flow rates, but I always seem to get faulty extrusion and very noticeable layer lines. Print settings are default Prusa slicer settings for the V-Minion.
I print exclusively PETG, but so far I have tried two brands. Photos are Prusament gray PETG, brand new roll (that's literally the first print with that roll).
Can someone give me some pointers on how best to diagnose and fix this problem?
Many thanks!
11 Replies
What's the extrusion multiplier in your filament settings?
I have tried everything from 0.95-1.5. it works better if you reach 1.5 (which is far too high), but then the top layers suffer in quality.
I have since tried a 0.6 nozzle and the results are also better, but still not even close to perfect
Try 0 max volumetric speed in filament settings
I think prusament has 15
Thank you! I will make sure to try that today
I also had an additional thought. I'm using the Rapido without the high flow extension. Maybe it can't handle the speeds the V-Minion standard profile asks for? Seems like it should, but i'm not sure
Since you have already calibrated your Rotation distance, I think the issue should be between slicer config, nozzle size config in printer.cfg or thermistor not reading the correct temp thus printing at high temp
Thanks for the input. I have checked nozzle sizes on the config and slicer. I have not checked the thermistor.
I will do that tonight.
I really hope it's not that, since it probably means i have a bad thermistor...
Have you done PID tune?
What does setting that to 0 do? Turn it off?
Max volumetric speed | Prusa Knowledge Base
The Maximum volumetric speed setting (MVS) is one of the most…
I read that it is brand new filament but I recently printed some 3 year old petg without drying and this is the texture it had...
It won't hurt to chuck it into dryer for a few hours...
@Ferfi thanks for the input, you're 100% correct. I haven't had the time to come give feedback but I did dry the filament last week and that's exactly what fixed it
Printing quality still isn't perfect but it's a lot better