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Help! My Prints are Delaminating

by m0hkg

I'm just about ready to throw in the towel on 3D printing - if it's not one thing, it's another :0(

I have an AM8 with a SKR1.3, TMC2209 drivers and 3D Touch sensor running with the latest Marlin 2.0.x.

I've been through all sorts of issues, and after much tweaking and tuning, I thought I'd cracked it when the 20mm test cube printed perfectly earlier today.

However, after printing the top of the display/keypad case this afternoon the d@mn thing delaminated as soon as I took it off the bed.

I'm printing PLA at 205 degrees C on a bed that's 60 degrees C with a 0.2mm later height on a 0.4mm nozzle at a 60mm/s print speed. Infill was 20% on this job, but I'm not sure that matters as the edges have also delaminated - these were 0.8mm.

Granted, the PLA is a couple of years old but i've just tried printing again with new PLA I got from Prusa and it's the same problem.

I think I have enough 'squish' when I start the job - perhaps too much, but squish between layers should give better adhesion right?

Can anyone point me in the right direction to crack this problem so I can enjoy prints that don't fall apart?

Thanks in advance!

Martin
m0hkg

AM8 delamination PLA
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Autolevel with marlin crash

by 5ft24

Have my A8 running Marlin, and all is well and good. Configured for bilinear bed leveling. Most of the time, it runs perfect, However, sometimes it will be in the middle of the G29, and not at the same point, the head will just keep heading down. you can see the light in the sensor come on, but it keeps going. have to power it off to stop it. When I power it back up, I relevel the X, relevel the bed, redo the Z offset, and all is fine. It may do it the next part, or not until after 5 or 6 more.
Running Octoprint on a Pi 3
Sensor is the 18mm inductive.
Firmware is Marlin from the Skynet github, 1.1.3 (Latest there). I have even re-pulled the firmware, re-compiled and re-flashed the board.
Any ideas?

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program board with arduino

by ipt

hi,

i have an A8 board(A:1284-Base- on the top right it says V1-5.)

i dont want to use it as a printer, just to control the motors with it via arduino IDE.

Is there a good source where i can find a pinout and explanation wich pins are connected to what ?

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Anet a8 X axis shift on pause

by Cromlyngames

If I use the firmware pause print, the bed rolls forward, the z axis raises and the print head moves to the X origin. Well, past it I think. On resume I have a 3-4mm X axis offset. I'm printing a bowl that fills the print area so quite easy to see X Vs y.

I'm aware of the front screw catching the bed issue for y offset, and this is not that.

I think what is happening is different behaviour when homing and pausing. When homing the head moves until the switch clicks closed, and then moves out again until it opens. On pause it just moved until the switch closes but then does not move out again. This could explain it, but it would give me a 3mm shift towards the origin. The thing is, the offset in the print occurs in the opposite direction!

The offset appears to be a once only consistent thing, so as long as I pause and resume at the start of the print I don't need to worry about it. Bit of a faff though.

Any ideas?

pause troubleshooting
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