So I’m close to my end-goal with my printer modifications many thanks to @Mark_Rehorst . I’m just having one last issue with some sort of Z wobble. It’s not evident throughout the print, only on smaller perimeters. I’ve printed a wing that looks almost perfect. The winglet, however is a different story. it seems that smaller circumferences are affected. Because the rest of the print looks good, I can’t say it’s the lead screw pitch with relation to layer height. This was printed at 70% of 30mm/s. I would appreciate any insight.
Thanks in advance,
Looks like a temperature issue, how is the cooling airflow on that part of the bed? (Assuming PLA). What is your minimum layer time?
I was wondering if it was a temperature issue as well. I just ran through a PID autotune. The new values are way different from the last time. I’m going to try another print - I’ll let you know what I see for minimum layer time, I don’t have that info no - my last print statistics are gone.
Even if you’ve got the temp right, lack of cooling airflow can do things like that, because a tall, thin, unfilled structure just doesn’t have that much rigidity. And you get side forces from the extrusion process as well as from shrinkage.
Another potential temperature issue is within the hot end. If you’re slowing down, you may be getting increased head creep, which could cause friction to build up in the extruder, which may be resulting in a few missed steps or just difficulty maintaining consistent pressure.
Thanks guys. I’ll take all this into consideration and start tinkering with my temperature and fan/cooling settings.
It’s not cooling - I’ve just added a new cooling setup. The fan was from a server power supply, it pushes quite a bit. I can’t figure it out. Belts are tight, cooling is more than adequate. I’ve slowed down printing on layers that are extremely short.
