Level of the Heat Bed on A20T

[cala]

Hi,

I have levelled my printer A20T following the documentation and video provide by Geeetech on the site.
I have printed the model successfully. But when I like to print some model higher, I have a problem on the first layer and the printing don't continue correctly at quality level spoking.

Then I have take a mode into tinternet to print a Levelling control. See the result into the picture attach.

Can you please help me to solve it?
When I check the levelling using the level check function from the printer, the 4 corner of the Bed are OK. But when I go to the middel of the printer, then paper is block and don't move. The Nozle is totally on the Bed.

The printer is new.

Best regards,

Calà Salvatore

[William]

Hi, You can check whether your hot bed itself is flat,
Then check the lower height setting, it is generally recommended to be 80% of the nozzle diameter.

[cala]

Thanks for the reply.
I have install a btouch to prevent the problem.
Seams the hex file on your site don't work correcly.
Impossible to calibrate.