Can anyone help me diagnose this? Extrusion Variations
I installed the direct drive e3d titan on my prusa mk2s. I updated the firmware. Set my extruder current up to 550 and my steps per mm at 418.5. It prints and everything... But I keep getting this horizontal z banding artifact on my prints. The z rods are perfectly straight. So i know i don't have any wobble there. And the artifact only shows up when printing something "complicated" and cylindrical shaped. The artifact is uniform rings.
I cant print calibration cubes and simple hollow cylinders all day and they come out perfect. I am very close to just going back to the stock mk2s setup. This problems has plagued me ever since I did thr "upgrade". I even tried the newest 3.0.11 firmware then switched back to 3.0.10.
Just for reference, the First photo is part of the exact same print. It's the shell that is supposed to hold the hairs for the lions Mane. atleast from what i can tell, the cylindrical shell does not show any of the same problems. ❓
Any help would be amazing. Thanks everyone
Re: Can anyone help me diagnose this? Extrusion Variations
Did you calibrate the extruder? Did you measure the filament?
You really are asking the little ATMega to work exceptionally hard with all the steps required to drive the extruder. You may find you get better results if you print at 0.1 or 0.05 mm layer heights (ie generate fewer e-steps).
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Can anyone help me diagnose this? Extrusion Variations
yeah? Now that you mention it... i did get slightly better results when printing the calibration fidget spinner created by Makers Muse. that was done at 0.1mm layer heights. The problem was still there. But the rings did not make a complete revolution and they were not near as deep. Do you really think i am at the upper limits of what the mini rambo can handle?
I took most of the z-axis apart and put it back together. I re-measured the 100mm distance the Z axis needed to be from the rear Y-Axis, tightened everything down and removed the slightly squishy vibration dampeners from the feet because i noticed the printer moved around just a tiny bit easier with them on.
i also noticed my belts were a little too tight; So i loosened them up by 1-2 notches max.
after i did all that, i printed the Marvin Character that came on the Prusa SD card with the included Prusa Silver Filament. the only problem i had was bad seams and possibly too much heat applied to both the extruder and heatbed. ( the 1st quarter of the print +overhangs didn't do so hot.) I did not see any of those perfect ring artifacts on Marvin.
I started a Large print this morning before i went to work. ( the Dragon). So we shall see how that turns out.
The Marvin print gave me high hopes. i just hope it was complex enough to reproduce the issue since the artifact seems to only pop up when dealing with complex shapes.
Luckily, i finished printing a Dragon literally 20 minutes before i did all the z axis maintenance.
So i will have a great "Before & After" comparison when this next dragon is complete.
I will most definitely post both Dragons side by side when i get home. Fingers crossed.
(side note; i noticed the X-Axis Pulley had some fine black pieces of rubber the consistency of sand or sugar spread around it. the belt isn't rubbing against the walls and the bearing turns fine. Have you had any issues with the smooth idler Pulley? Do you recommend a particular brand of 16 Tooth Idler Pulleys?)
Re: Can anyone help me diagnose this? Extrusion Variations
Regarding the idler pulley, it is possible that the 2 screws in the right hand side of the X axis are incorrectly tightened which is causing a slight skew and the belt is rubbing occasionally.
Use a multimeter set to continuity between screw and smooth rod. Loosen the screws and then tighten them so that you just get a signal.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…