Stringing and blobbing with a 0.6 mm nozzle
I'm running the default RatRig 3.1 400mm kit, but with a Rapido 2 and a 0.6 mm nozzle (a MicroSwiss CM2 Copper Hardened Steel V6 nozzle). I'm printing good PLA (Atomic Filament) that has recently been dried. I've run all the calibrations from the setup guide. I am still getting a ton of stringing, though (see pictures).
I have PA set to 0.01, but I tried bumping it up to 0.045, with no change.
I normally print at 205 C, but I tried dropping it to 195 C, with little change. I normally have a retraction of 2.8 mm, but bumped it up to 3.6 mm, with no change. I normally have a retraction speed of 55 retract/35 de-retract, but I bumped them both up to 65, with no change. My fan is usually set to 50%, but I bumped it up to 75%, with no change. Any idea what could be going on here? Is there some other setting that I need to change? Is it the fact that the nozzle is steel-coated? I have a nickle-plated E3D copper nozzle- would that do better? I'm at wit's end.
I normally print at 205 C, but I tried dropping it to 195 C, with little change. I normally have a retraction of 2.8 mm, but bumped it up to 3.6 mm, with no change. I normally have a retraction speed of 55 retract/35 de-retract, but I bumped them both up to 65, with no change. My fan is usually set to 50%, but I bumped it up to 75%, with no change. Any idea what could be going on here? Is there some other setting that I need to change? Is it the fact that the nozzle is steel-coated? I have a nickle-plated E3D copper nozzle- would that do better? I'm at wit's end.
7 Replies
Here are the pictures. They appear to have gotten stripped from the original message.
This might be a silly suggestion, but Ive seen stringing on my own tests like this if the extrusion multiplier is a bit too high. Too much will be extruded, and some will touch the nozzle and be dragged along when it moves
It might be something else wrong but you can give it a try
Thanks for the suggestion, @truckdoor ! I gave it a try and didn't notice much difference, unfortunately. I tried switching to my other nozzle, too, and that didn't seem to help. I did see some difference bumping my PA up to like 0.2, but If I go much higher the extruder starts skipping. I guess I'll have to switch back to a 0.4 mm nozzle until I have time to play more with this.
Just for good measure, have you tried increasing the temp? I print some PLA at 210-215
I usually do a temp tower and then write the value on the spool
Also try playing with z hop, just give it like 0.2 mm or something
And you can enable firmware retraction, and play around with the values live in the web interface
And also try reducing the print speed live and see if it helps any
