Geetech I3 W - Nozzle hitting bed when starting print

[KrisS]

Hi all

I am completely new to the world of 3d printing. I ordered the I3 W and successfully build it. Now I am struggling already for the past week to get it to print correctly.
I have leveled the bed, successfully set the ends top on the Z axis and auto home works perfectly.
However as soon as i start printing something from the SD card the nozzle always tries to drop below the bed. Before printing the display on the I3 W shows X0, Y0 and Z0 but the nozzle still tries to push into the bed. I have searched on Google and on this forums but can not figure out what is the problem.

I would appreciate any help you can offer.

Thank you

[_kaktus_]

Hello.


This can be caused by the set ofset for the Z axis or the position of the model below bed level.

[KrisS]

Thx for the reply.
I have tried multiple models and it happens with all of them. When i leveled the bed and moved the extruder to X0 Y o an L0(top left of bed it also shows the same X0, Y0 and Z0 on the screen.
When i turn on the printer the nozzle/head also stays in this position after auto home. Can you tell me where to check for set offset for the Z axis ?
I havechecke in the slicer of EAsyPrint and the start code mentions

Code: Select all

G28 ;Home
G1 Z15.0 F6000 ;Move the platform down 15mm
;Prime the extruder
G92 E0
G1 F200 E3
G92 E0

I assume that the G1 Z15 line is the problem ? I haven't changed any code here. It is as when installed.

[_kaktus_]

You combine well.

But the

Code: Select all

G1 Z15

will move the heads upwards.
You can always place a semicolon at the beginning of the line for testing.
Then save the new script.

Also check the settings on the printer's operator panel.

The position of the model should be checked before starting the slicer.