Hi,
Recently when i have been printing on my Flashforge Creator Pro the nozzle jams up on the 10th layer. I currently am using temps of:
Hot end - 230 (PLA)
Bed Temp - 75
I have an all metal hot end as i have experienced issues previously with PTFE tubes melting. The bed is level and I’m using scathed blue painters tape. I have tried multiple filaments as i originally thought it was because of that. The first layer adhesion is alright it is sticking to the bed. Any help would be appreciated on how to fix/prevent this form happening again.Link to some pictures are as followed:
https://www.dropbox.com/sh/crqr2h8kif0q82w/AAAlFRHthvaacSfBzAqgaAJIa?dl=0
Thanks in advanced,
Ben
1 Like
cobnut
2
Hi @ben_garman_50 I had problems with jamming filament on my FF Pro; I can’t say for certain that what I did was precisely the cure of the problem, but I can say I haven’t had a jam since, so there’s a good chance it was the right thing to do… I’m also using the Swiss Micro all metal hot ends so hopefully I have a very similar set up to you.
Firstly, 230C is quite hot for PLA; I tend to print at 215C for PLA (sometimes 210 - 217C for different brands, but never more than 220C). At this temperature you’re probably making the filament too soft before it reaches the hot end and that’s a recipe for jamming, or possibly simply losing traction on the filament (because it’s so soft the knurled wheel can’t grip it).
Secondly, I’d take a look at your extrusion rate. I had real problems with PLA looping around inside the extruder drive assembly and reasoned that the filament was being pushed in faster than it was being extruded out. I reduced my extrusion rate to about 96-98% (again, varies with brand) and it’s not happened since.
Have you looked at your filament inside the extruder assembly after a “jam”? Is it wrapped around the mechanism or, if not, has the drive wheel gouged a trench in the side of the filament being fed? Either way, my first step would be to reduce the hot end temperature, second step to reduce the extrusion rate slightly.
What cooling setting are you using?
Way to hot for PLA. 200 range for extrusion and max 65 for the bed. If you are printing a smaller part with a lot of retraction movements especially big ones you are probably getting heat creep (especially at those temps).
