Hi there. Stringing is often problematic because there’s so many things that can cause it, and the Luban settings don’t let you control some of them.
There’s plenty of topics in the Snapmaker 2 forum, and since you previously mentioned you have an A350, it would be good to look through there. I summarized a lot of the initial steps I took, including retraction and z-hop testing to minimize stringing in this post:
In the meantime, here’s a short list of things I can think to check. I’ll list what mine is currently set to, but don’t take that as gospel, yours may likely be different.
- Temp: 205C it looks like yours may be too hot, try adding some thermal compound to the hot end’s thermistor - it may be reporting the wrong value and printing too hot. At least try dropping the temperture 10C or 20C or so and seeing if the prints improve.
- Retraction / Z-hop: 1mm@60mm/s, .5mm
- Print speed: 40ish mm/s
- Minimum layer time: 5 to 15 seconds
- Linear advance, acceleration can affect it.
- As you mentioned filament age / moisture content.
- Cooling - try a desk fan next to the printer, see if that changes anything
Just for comparison’s sake, here’s what a decent looking stringing test tower can look like:
It doesn’t have to be perfect when you’re done tuning, but at least the core spike should be better.