Second layer issues?

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disser
Posts: 6
Joined: Sun Nov 15, 2020 7:16 pm

Second layer issues?

Postby disser » Tue Jan 12, 2021 12:31 am

I've had a lot of success with my E2 printing PLA, and now I'm trying out Raise3D ABS & ASA, and MatterHackers PETG (which has been dried). Here's the issues I'm having:

* The first layer is not well adhered to the build plate. It's not miles off but there's no "squish" to be sure, except for the perimeters.
* The SECOND layer is not at all adhered to the first layer, except at the perimeters. When the print is done, I can slide the first layer lines around because they're not adhered to each other either, just pinned at the perimeters.
* From the second layer on, everything is totally solid.

What could cause this weirdness? For what it's worth, I've calibrated my nozzle offset, and checked my extruder tension. On my previous printers I've never seen something like this.

NOTE: not using a raft

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Steven@Raise3D
Posts: 112
Joined: Thu Dec 17, 2020 11:24 pm

Re: Second layer issues?

Postby Steven@Raise3D » Tue Jan 12, 2021 2:13 am

disser wrote:I've had a lot of success with my E2 printing PLA, and now I'm trying out Raise3D ABS & ASA, and MatterHackers PETG (which has been dried). Here's the issues I'm having:

* The first layer is not well adhered to the build plate. It's not miles off but there's no "squish" to be sure, except for the perimeters.
* The SECOND layer is not at all adhered to the first layer, except at the perimeters. When the print is done, I can slide the first layer lines around because they're not adhered to each other either, just pinned at the perimeters.
* From the second layer on, everything is totally solid.

What could cause this weirdness? For what it's worth, I've calibrated my nozzle offset, and checked my extruder tension. On my previous printers I've never seen something like this.

NOTE: not using a raft


Is this issue something that has just started occurring or has this problem always been occurring? Would you be able to show a few photos of the first as well as the second layer issues?

disser
Posts: 6
Joined: Sun Nov 15, 2020 7:16 pm

Re: Second layer issues?

Postby disser » Tue Jan 12, 2021 2:34 am

This shows pretty clearly, I was able to separate and break off some of the layer lines with my thumbnail. All the layer lines slide around like a blanket.

20210111_120006.jpg

disser
Posts: 6
Joined: Sun Nov 15, 2020 7:16 pm

Re: Second layer issues?

Postby disser » Tue Jan 12, 2021 4:15 am

I got the first two layers to stick by changing FL flow rate to 120% and FL solid fill extrusion width to 140%. I still see this very weird underextrusion in the first few layers:

20210111_200642.jpg


This is not seen in the preview:

Screen Shot 2021-01-11 at 8.04.14 PM.png


I'm attaching the gcode as well.
Attachments
calcube petg 4.gcode
(884.5 KiB) Downloaded 1 time

disser
Posts: 6
Joined: Sun Nov 15, 2020 7:16 pm

Re: Second layer issues?

Postby disser » Wed Jan 13, 2021 10:50 pm

By the way, my E2 is running RT 1.4.3.806, and FW 0.2.506

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Steven@Raise3D
Posts: 112
Joined: Thu Dec 17, 2020 11:24 pm

Re: Second layer issues?

Postby Steven@Raise3D » Wed Jan 13, 2021 11:27 pm

disser wrote:By the way, my E2 is running RT 1.4.3.806, and FW 0.2.506



Thank you for clarifying all the information. Would you be able to print this small model out of PETG and share the results here? It is sliced for PETG on the left extruder.
Attachments
Block Peg (PETG) (Left).gcode
(2.2 MiB) Downloaded 3 times
Block Peg (PETG) (Left).data
(64.75 KiB) Downloaded 1 time

disser
Posts: 6
Joined: Sun Nov 15, 2020 7:16 pm

Re: Second layer issues?

Postby disser » Thu Jan 14, 2021 6:16 pm

Here's the result. The first and second layers are not well bonded and the first layer outer perimeter is also not well adhered.

20210114_101340.jpg

20210114_095017.jpg

20210114_095119.jpg

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Steven@Raise3D
Posts: 112
Joined: Thu Dec 17, 2020 11:24 pm

Re: Second layer issues?

Postby Steven@Raise3D » Fri Jan 15, 2021 2:05 am

disser wrote:Here's the result. The first and second layers are not well bonded and the first layer outer perimeter is also not well adhered.

20210114_101340.jpg

20210114_095017.jpg

20210114_095119.jpg



Thanks for the update. That is definitely very interesting. Would you be able to provide me with a few images of your hotend assembly? Also, in your testing did you find the issue to only occur on the left printhead? Or did it also exhibit the same behavior on the right printhead?


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