#Having Real Problem with 0.3mm Nozzle

1 messages · Page 1 of 1 (latest)

full nexus
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I love Orca...
I have a Heavily Modified Ender 3 Clone I am trying to make my "detail" printer with a 0.30mm nozzle. Not quite a 0.2, but finer than a 0.40.
I have Plenty of heat with a CHC Ceramic Heater.
I have Plenty of Cooling with a HeroMe w/Dual fans.

I am trying to perfect my First Layer. All I get is a box with lots of strings across the Bottom, not a consolidated layer.

This is PLA
Nozzle Temp 235C
Nozzle is Cemented Carbide 0.30mm
Bed Temp 65C
Nozzle Zeroed on a post it note at 0.09mm
Total Z-offset is -2.64
First Layer Height is 0.20mm
MEASURED First layer thickness is about 0.31mm (pretty close to .2 + .09)
Steps/Mm confirmed, typically +/- 2mm out of 200mm
BMG Extruder tightened so that it doesn't Click up to about 6mm/s filament Speed (never gets that high)
First Layer Speed is 10mm/s
Fans Off for first layer except for Heatbreak Fan (no part cooling)

My Purge Line sticks fine at a 0.28 Height (plus the 0.09mm) "G1 Y140 E10 F1500 ; prime the nozzle" Height is set several lines earlier

But when I try to Print a 30x30mm 1 Layer BOX what I get is

(The attached Photo)

I have gone up a bit more in temp with no effect. Tried lowering my offset a bit, again no effect....

What Should I try Next?

IMG_2533.JPG
coral pine
full nexus
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Yup, the Nozzel is s et to 0.30 and all of my widths are for a 0.30 nozzle, as in 0.30-0.35 widths depending on the individual settings. I have gotten it "better" by lowering my nozzle a bit more, and increasing my Steps per/mm from 410 to 412. Still when I tried to do a "real" print, it peeled on the 2nd layer...

Trying some Hairspray, may need to dig out my glass bed...

coral pine
# full nexus Yup, the Nozzel is s et to 0.30 and all of my widths are for a 0.30 nozzle, as i...

You shouldn't be changing your steps/mm, those are meant to be a mechanical constant that is calibrated once and then left alone unless something in that portion of the motion system changes (e.g. gears, motor, etc.). Once that is set, all extrusion issues should be handled elsewhere.

My best guess now is just that your z-offset is too high. Have you tried Calibrating this with a single layer print and doing a "live z-offset" adjustment as it prints? This is usually the most effective way to get it dialed-in.

full nexus
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Too high and still too fast.
Got it a LOT better by changing the flow on the bottom layer, and lowering the Z another 0.05.
Looks really nice on my test chicklet, with some really weird aberrations, as in Burn marks....
Have to do some real work for a bit, then I will post pictures...

full nexus
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Ok, here are my current Flow calibration chicklets. Any one of them would be acceptable, but the 0-5 range looks best. Will try the Tighter test next.

HOWEVER, the chicklets have what looks like BURN marks or stains, but they are in "areas" not particularly following the print lines. Never seen these before. Nothing on my Filament, so I have no Idea. Did have a "BLOB" failure where there was a big ball-o-filament encapsulating my poor nozzle, but I thought I got that cleaned up/off...

IMG_27091.JPG IMG_27101.JPG
coral pine
full nexus
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Running the same file again to see if it does the same thing or something different. Maybe I didn't get all of the "BLOB" failure... I hope.

steep silo
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Did you check for a hotend leak?