What can I do in settings to counteract this?

[truenorthtrader]

Hey folks!

A couple pics of a vase I half printed as it started to come loose at the lines across it in certain spots which you can see.
Also the obvious rattiness of the holes with curled material everywhere.


I tried messing with retraction settings from 4 up to 10 but similar results.

Hot end temp 210.
Bed 75 first layer 65 other layers
Speed Multiply 70%
Flow Multiply 100%

Any idea's what I can do at this point?
I re calibrated many times to get it as close as I could
thank you,

[gjadams]

my first thought is something is slipping in the retract direction. Where you have positive output it looks good. It's just the extra between.

what is your retract speed?

is the idler tight against the gear in the extruder pinching the filament?

when hot but not printing, are you able to retract at those settings manually from the host software?

[Polygonhell]

I agree with the previous poster the first thing to determine is if the retract is working as expected.
It's easy to think it is, but it's actually either stalling on one half of the move or in my case the filament was slipping a small amount during the retract.
Mark the gear and ensure it's returning to the original position, run some simple test pieces at various retract speed and lengths to figure out what's working, in general things should get better the faster the retract, but at some point, they will deteriorate because something mechanical is causing it to fail.

[mhackney]

I agree with the above posts on retraction slipping. When my son was completing the H-1.1 for his senior project (see post in Build forum) he had a similar issue. I placed a black mark with a Sharpie on the frontmost extruder gear so I could see it in operation. Turns out, the stepper was stalling on retraction. Simply slowing it down fixed the problem. So in addition to slipping filament, check that the extruder is actually moving in reverse during retraction!

Cheers,
Michael

[truenorthtrader]

Thank you so much guys!

I wish I could buy you all a round of drinks!!

My Settings are like in the manual settings. I put brim width at 2 because everything is curling ( Most prints DO NOT EVEN STICK unless head is touching bed, but then I get backups and plastic comes out of the inside of the Nozzle, and I have to take out and clean it. That's another big problem )

In Speed All set to 30, except External Perimeters is 80%
Printer Settings, under "Extruder 1" "Minimal travel after retraction" I hear to set from 4-10 and I tried both. I think this object was set to 8.

I would imagine the lower the better if I understand it?
Default was doing the same on the Cube.

I will try today and see if I can see if retraction is working properly.
I can't move the filament up through it by hand even a tiny bit it's snug but sounds like it needs to be tighter?

thank you so much again!
A

[mhackney]

Well, there is Beer of the Month Club!

Firstly, you need to fix your stick problem. Clean whatever surface you are printing on with rubbing alcohol first. I recommend printing on blue painters tape if you don't have a heated bed. If you do have a bed, clean it, you should get curl on it! Also, if the nozzle is too close to the bed, you won't get extrusion and/or poor sticking. Use the "paper slide" test - I use cigarette rolling paper since it is just about .001" thick. But even thin notebook paper will do. Place the paper on the table under the nozzle and lower the nozzle SLOWLY on click (.01mm) at a time until the paper just snags. Set that as Z=0.

Slow down your perimeters until you get good sticking on the 1st layer. Minimal travel after retraction is an optimization, mine is set to 2mm.

[truenorthtrader]

OK I set the Retraction to 2 and it's much much better!
thank you all!

Regarding the Stickiness, I tried all this many times and still nothing.

I even used HONEY! Super sticky, but never stuck.

The solution was the temperature wasn't hot enough in the hot end. I put it to 235 and it started to stick well, 240 was best.
The bed is 60, seems it doesn't need to be too hot as long as the material is hot enough.