Strange lumpiness after print is about 1cm high

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davies46
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Strange lumpiness after print is about 1cm high

Post by davies46 » Thu Sep 27, 2018 8:18 pm

I have a home-made Prusa 2 which has been printing fine for years. I recently dusted it off and since it was in an unknown state I reflashed it with the latest Marlin. The electronics is RAMPS 1.4 and all seems fine. I printed out thin wall and 50mm cube no problems (3mm ABS), but when I print larger pieces it starts getting very lumpy after around 12mm height. Specifically it shows on some wall sides but not others. I have tried printing with plenty layer cooling fan and no fan, different bed heating, cool ABS and hot ABS, I have checked the extruder for skipping stepper and jamming filament all with no change. It's not simply the height triggering a dodgy connection because the 50mm cube prints perfectly.

I have printed many tens of Kg of filament over the years but never seen this, neither can I see it in any of the many troubleshooting guides online.

Any suggestions very welcome indeed!

Now, if I can only share this image right... Image

Thanks,
Phil



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iDig3Dprinting
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Re: Strange lumpiness after print is about 1cm high

Post by iDig3Dprinting » Mon Oct 01, 2018 5:03 pm

A picture would be handy, lumpiness could cover all many of surface anomalies.


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