So Im trying out this new to me filament. Its a high speed petg and Im getting this banding around my print. Ive never seen this before and not sure if its the petg or printer. The prints come out smooth so not to sure. Thanks
Welcome to the club, I’ve never been able to solve this problem.
I will say that some filaments hide it better.
You can see the banding in the slicer if you look at Speed>
So thats the weird thing is it shows nothing in the preview on slicer. I have been doing some teating and it looks like its the temp. The manufacturer says to use a temp of 255-270c for 300-600mm/s speed. I was using 265c at 550mm/s. I did a temp tower and it stopped printing that light color at around 245-250c. So maybe a bad batch of filament or their claims are BS. Heres what im using. Amazon.com: SUNLU High Speed PETG 3D Filament 1.75mm, 30mm/s - 600mm/s Print Range, High Flow Speedy 3D Printer Filament, Fit Most FDM Printers, Dimensional Accuracy +/- 0.02mm, 1kg Spool, (Grey) : Industrial & Scientific
This looks like the banding you see when displaying a high resolution image at a non compatible resolution.
On any printer the Z height is rounded to the nearest INTEGER micro step. Depending on your layer height that can cause the printer to add (or subtract) a single microstep to the Z move on a regular pattern.
Also I am unsure how accurate microsteps really are. They are achieved by running both coils in the stepper motor “fighting” each other. It seems to me that friction could overwhelm the torque available when the motor is near the middle if a full step.
TLDR:
Change your layer height to an exact multiple of .032500 mm (6.5 mm per rotation / 200 (full) steps per rotation). 5 full steps = .1625, 6 = 0.195, 7 = .2275
Did you try adjusting your layer height?
OOPS!
for my original response I looked up the rotation distance for the Zero not the Ace.
I wish Sovol would change the banner to more clearly show the current thread. Not the first time I’ve made this error.
On the Ace the full step (16 micro steps) is 0.02 mm. The values in your screenshot are already aligned.
Do you have a print there that shows the banding? How far apart are they?
If they are 4 mm apart my GUESS would be that one of the Z axis lead screws is binding VERY slightly once per revolution. My long shot theory is that during printing one side gets behind the other then jumps ahead to catch up. If they are not 4mm apart then who knows.
2 skinny towers spaced far apart on the X axis could find out which side is causing the issue if my guess is correct.
You can close the Zero Coming banner, once you do it should be gone until a new one is posted.
The thread I posted above has some of the issues…I did most of it through PM’s with Sovol.
The bands are 3mm apart, 1.5 is the Z-rod gap.
I have already replaced the Steppers, POM Screw Nuts & Z-rods. I’ve tried with & without the top bearings removed.
I even added Oldham Couplings…still have the banding.
A friend mentioned the micro steps before, but said he couldn’t figure it out with Sovol giving him specs for the parts.
I kinda gave up on trying to fix it.
Well you are way ahead of me.
Oldham couplings was going to be my next recommendation.
About the only thing left is the Z axis rollers but 3mm seems too small a distance for a rough spot in a ball bearing.
It was the temperature. It was to high. I had it set at like 270 and lowered it to 250c and it came out perfect until it started clogging and did this.
That there is an epic ball of death…
Have you managed to get it cleaned off?
Ya, that’s gonna hurt.
Good luck.
Yeah thats a 4hr print in that ball. HAHAHA I was able to get the pressure sensor and nozzle-plastic ball off, but couldnt get anything else salvaged. I was able to get a new pressure plate from sovol and I have a new nozzle assembly so I should be up and running sooner than later. It just sucked to think you got this garbage filament set and this happens.