Cold bed leveling

Sovol SV06 ACE
1

Good afternoon community!

Being quiet new to FDM printing I hope to solve my problem with your help.
The ACE is my first FDM printer. I am (was) quiet impressed by the machine, as long as I printed smaller objects. Two days ago I started a large size project and it failed in the center of the bed. Absolutely no bed adhesion.
My bed leveling was in a range of 0.26mm after the initial setup with heated bed.
What is strange in my eyes that the printer does a bed leveling prior every print with cold bed and my mesh is turning into a valley in the center.
Is there a way to disable the bed leveling before printing?

Simon

2

Before to do that, try to understand why your model doesn’t adhere.
What filament do you use, at what speed and temperature ?

3

Filament ist JAYO PLA standard grey.
Bed temperature is 60°C. Extruder temperature is 235°C for the first layer all other layers 210°C.
First layer speed is 30mm/s, first layer infill 30mm/s.
Other layer speeds 120mm/s.

The strange issue ist that the initial leveling with hot bed was very good but every pre-printing mesh is so bad.

4

Can you post a picture of your mesh? I had very similar issues until I manually leveled the bed.

5

I heat the print bed to 40°C before printing begins. The printer then levels itself with the preheated print bed.

1 Like
6

Bed mesh 1_055543
Bed mesh 1_0555431109Ă—778 89.2 KB

7

That is my mesh @ room temperature (21°C)
Bed and extruder not heated

8

Well that explains your issue.

See how I manually adjusted by bed here.

I’ve been printing large objects since then with perfect first layers consistently.

9

Simon heated_061128
Simon heated_0611281110Ă—751 93.3 KB

10

That is with bed at 60°C and extruder at 210°C.

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11

Indeed, since you’re going to print on a heated bed, and heating the bed changes its shape, Sovol themselves recommends changing your slicer’s start G-code to heat the bed before generating the mesh. Rather than skipping the bed mesh generation (which is useful to redo for each print since the mesh changes a bit each time you remove and replace the build sheet), just have the slicer do the pre-heat first. :slight_smile:

The latest profiles in the OrcaSlicer Github have this change incorporated, BTW, so if you grab those, you should get the heated mesh “for free”.

12

I just manually preheated the bed, started then the large size project that failed before and … no issue! Obico is watching the progress and all is fine.
Manual bed leveling will follow anyway.
Many, many thanks to all of you for showing me the right way!

2 Likes
13

The advantage of changing the start G-code is that, after, the pre-heating will be done automatically with each print without any manipulation.

1 Like
14

Also you do not need to worry about getting distracted and waiting too long so the idle timeout kicks in and the heater turns off. (Ask me how I know, lol.)

1 Like