Stringing issues
Hi everyone, I’m at my wit’s end. I think I’ve tried just about everything I could find on this forum and others. I’ve printed countless stringing towers, but my issue with stringing persists. No matter what I change, it seems to have little to no effect on the degree of stringing.
I have an MK3S+ without an MMU. I print with Sunlu PLA+ spools, which have been actively dried (just to be sure). I’ve tried different colors from different batches. I started with the default settings and from there made small, incremental adjustments. I’ve experimented with:
- Filament temperature
- Retraction length and speed
- With and without Z-lift, and different Z-lift heights
- Extrusion rate
I’ve even replaced the nozzle with a new one. No matter what I tweak, the results barely change.
I’m starting to suspect that there might be a hardware issue with the printer.
Any ideas?
RE: Stringing issues
How low have you gone with the temperature?
this white filament would string badly at temperatures above 170C
Unfortunately Prusa set the cold extrusion limit at 170C, so in order to get better prints than this, I had to set the cold extrusion temperature to 150C and the print temperature to 170C for the white...
this was actually printed with MMU2
White was some no name Chinese cheap filament Black was Sainsmart TPU and Red was another no name chinese filament
On the next print I increased the purge volume for red to white colourchange as well, to reduce the colour bleed seen on the left hand panel
I Also had problems with the white filament stringing on Non MMU Prints, but this is the only picture that I have available
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Stringing issues
Hi thanks for your reply. I’ve went all the way from 190° up to 235°. Specs says between 195-220°. It makes no difference at all
Please show us a picture of the issue.
Cheerio,
RE: Stringing issues
RE:
these ones are all from after the nozzle change (made absolutly no difference btw)
1. T195/215 Rl2,4 Rs100 z-lift 0,4 em 1,0
2. T195/215 Rl2 Rs80 z-lift 0,4 em 1,0
3. T195/215 Rl0,4 Rs35 z-lift 0,2 em 1,0
4. T195215 Rl0,8 Rs35 z-lift 0,4 em 1,0
5. T195/215 Rl0,8 Rs35 z-lift 0,4 em 0,95
6. T195 Rl0,8 Rs35 z-lift 0,4 em 0,92
within the higher towers i changed the temperature around every 1/3 of the height with increments of 10 degrees
T=temperature
Rl=retraction length
Rs=retraction speed
em = extrusion multiplier
retract on layer change is on
For how long did you dry the filament? That still looks damp. Try a few hours more and print at 205°C. White and pastel filaments are always troublesome so test also with a dark colour.
Cheerio,
RE: Stringing issues
It's in the dryer for more than one week already. I 'shocked' the filament with a 9 hours @ 55 degree. after that the dryer goes into maintance mode. where is keeps the humidty at a controlled level between 20-25%.
I've a wide variety of colors, from lighter colors up to brown and black. The stringing problem persists true the entire color range.
What size nozzle are you using?
a controlled level between 20-25%.
I usually aim lower - target 10% but usually end up around 14%
Take a sample as low as you can get and test again.
Cheerio,