Having a hard time solving ringing/ghosting?
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I did the pressure advance test code print.
I made the suggested changes as well. Didnt behave badly at all. I was thinking I would bump them up a bit more. Retract speed is at 50mm/s.
Im not sure what I should set my PA to though. not sure how to interpret that print.
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What kind if printer is it? What kind if extruder? Is it using a bowden tube? If so, how long?
A good value to start with on a direct drive extruder is 0.05.
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Its an ender 3. Bowden extruder and the tube is right at 250mm long. I set it at .1
I've discovered why my corners look better on the layers that include letters. The layer change when the printer moves the nozzle up happens in a different spot.
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0.1 sounds about right for that setup. Some pressure advance is better than no pressure advance.
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So i discovered something else. The babystep buttons for the z axis if i put a .2mm offset the corners look alot better but the bottom layer on the buildplate looks like total crap.
Makes me think it may be an issue withnover extrusion. But ive double check my value there and its pushing out exactly a 100mm
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If you've already leveled the bed as best as you can, and you have a z probe, you may want to consider mesh grid compensation to help with the first layer.
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@phaedrux Yip I am already using the mesh grid.
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I wonder if it's your choice of layer height. I think the ender 3 z axis has a limited range of full step positions. I think it's steps of 0.04mm.
Try a Google search for ender 3 magic layer height.
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@Phaedrux
yip you are correct it is .04mm. I read it as as long as your layer height is a factor of 4 then your good. I did just discover there is a setting in cura to randomize the start point of each layer. The setting is called Z seam alignment. I think it is going to solve my issue. -
The z seam alignment option will need to be tailored to the model you're printing. Sometimes it can be hidden in corners, sometimes it's best to align it manually to the back side of the model. Sometimes you want the shortest travel to prevent stringing like with PETG. Randomized can be good for some things but it can leave little pick marks and bumps randomly over the surface which isn't always preferred.
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Yip I have experience that. Printed a couple cubes to see what different settings would do.
So changed jerk on the Z axis. Also upped accelerations a bit. The seem is starting to look good. I think I will be satisfied with this and move on to a bench test model and see how it performs and tune some more based on a for difficult print.
I got a picture of the issue with brim. The nozzle slows down while printing the brim in this one corner. Once it is done with the brim it no longer slows down in that corner.
