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Nicolo
(@nicolo-2)
Active Member
Calibration errors

So I finally fixed my uneven extrusion which was due to the y-axis having a small skip that I hadn't noticed at first. Now I have a gap in my z calibration test print despite it being smoothed out as well as the left corner having larger gaps. Any ideas why maybe I tighetend my y axis too much or maybe the filament needs to be 0.2mm instead of the default 0.15 mm that came with it. That last one doesn't seem likely since I was filling the whole square earlier.

Posted : 15/08/2020 5:11 am
Peter M
(@peter-m)
Noble Member
RE: Calibration errors

Holes means, z calibration not low enough or not enough filament coming out, normally it is not low enough.

Setting in printer, use 7x7 calbration.

How to  first layer calibration,

 

In general how iI work:

A new sheet will stick less then a used one.

PLA sticks more difficult on a powder coated sheet. Is still possible settings need to be more preciese.

This how I work on a pei sheet(there are always exceptions):
Most important to 3d printing is:

1. 3d print will never be like start and i have the print, there will always be problems!!!!!!

2. A clean sheet, use dish soap, then you can print on it. A few prints you can use alcohol, then again dish soap,
big flat models and models with small footprint on sheet- use glue stick(and not every glue stick is the same,
use one that makes a thin layer), and big flat models and small footprint, use a big brim attach to model so footprint is bigger.

Petg sticks to much on the pei sheet, use window cleaner, this leaves a layer on the bed, so it does not stick to much.

3. To get it stick very good, a 100% first layer is very important, see youtube for movie on this.
Every new print watch the first layer, and look if it is 100%, this will also prevent a big ball of filament on your nozzle wen model let loose during printing.

Extra: (normally not needed).

First layer, print hotter.
First layer slower.
Bed more heat.

Most problems are first layer to get this 100%, and bed not clean.

Bad filament is possible, or filament with water inside.

Move extruder to the top and extrude filament, it should go straight down(if not, nozzle possible blocked),
it should be thick enough(if not, nozzle possible blocked, or partial blocked), (do a cold pull),
if Bubbling during extrusion then it has to much water inside.
Check after the first layer is ready, then you see if it sticking enough, and not releasing and sticking to the nozzle.
If you see white spots like a bubble on the bed, then filament is releasing from bed.
Also no gabs between lines should be visible.

Use 7x7 calibration for first layer, see settings in the printer.
Search for " 3D printer first layer problem Calibration process" on youtube, movie on first layer calibration, with a good zoom in.

Posted : 16/08/2020 5:48 am
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