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Discussion in 'Calibration, Help, and Troubleshooting' started by Chase.Wichert, Mar 29, 2016.
Why am I getting his vertical banding and how do I solve it?
As it's not at the start: control your pulleys, they may wiggle.
Little more clarification? All of the belts are tight..
Loose grub-screws. Assumed you had nice prints before and your z is perfectly aligned, this normally is a belt-issue.
Hmm I have everything loctited in, I have never done anything this big either...
It also does it on all four sides, and not on the corners..
The start is ok, so it should normally be something mechanical.
All of the grubs appear to be tight... I'm not sure what else to check...
According to this link, it could be one of three things:
Printing too fast
Does this appear on the x- or y -axis ? Maybe you have to tune driver voltage.
Yes it is on all four sides, I had acceleration at 1300, I just dropped it to 500 to see if that helps, I read it somewhere, and I am printing at 50mm/s
I am kind of wondering if it has something to do with volcano, also I just switched my dual to a pro to make use of he entire print bed...
Then it's the extruder pulsating. Check its calibration, a small change there can cause something like that. Maybe the extruder is simply to weak to follow, then you must slow down.
Edit: just had another idea: maybe your hotend is not tight enough, as you changed from dual to pro.
Hmm, I think it is pretty tight, I'll check how the print is going when I get home, Hopefully well... Because I am running out of time...
I've seen this before.... When this was not the usual suspects of loose belts and grub screws, it was because there was a bit of plastic in the extrusion path. This causes enough resistance to make the plastic jitter on its way to the hot end. It might sound crude but one way I solved this was to straighten out a paper clip and run it up and down the inside of the extruder path. This will dislodge that tiny bit of plastic and it will pass through the extruder.
Interesting, I feel like it would be hard to get something stuck in a .8 nozzle..., if my current print still shows banding I will definitely clean it out. However I tightened one of my y axis belts it is now really tight, and my x axis belt, And decreased the acceleration to 500, something helped, however now I have zits all over my prints, I am thinking my filament has absorbed water, the 10kg spool...... But I have an airtight dog food container coming, along with desiccant so I can create a dry box.
What I was talking about wasn't necessarily anything in the nozzle but bits of melted plastic that adhere to the walls of the plastic portion of the extruder. It doesn't take much to create enough friction to cause the filament to stutter its way to the hot end. So if you've been printing a lot, when you withdraw the filament from the extruder, sometimes little threads of melted plastic can be left behind and stick to the plastic portion of the extruder. Inconsistent filament thickness could make this problem even more pronounced, so swollen / waterlogged plastic could be contributing to your issue. Overall, the smoothness with which your filament is traveling through your extruder could be the origin of this banding and anything that is interfering with it could make it worse.
10kg spool! That's a lot of water absorption. You'll need some hefty amount of desiccant! But at least you can print the rocket from the reprap festival video...
What's weird is that it prints really well at the bottom then all of a sudden banding...
Hmm... Well this might help you with your desiccant challenge:
It could also be that your hot end is cooling off for some reason, causing resistance in the extruder at higher layers. This has happened to me before too.