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Irregular blobs in large scale print

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Posted · Irregular blobs in large scale print

Greetings from Switzerland,


I am using a Modix 120X large scale printer with an E3D supervolcano and a 1mm nozzle to produce a prototype using cura 4.7.1. I have been tweaking the setting for a couple of weeks to get acceptable results with sufficient printing speeds (currently ~120g/h). However, the hopefully last remaining problems remain a mystery to me. To summarize them:

-irregular blobs on the inside of my object

-slight blobs, like tongues at the front layers

-irregular extrusion at the beginning of a new layer, as if there were bubbles in my hotend

-after finishing a layer with the infill, the nozzle does not move directly to start a new layer. Instead, it completes a very jittery, almost spasmic motion after lifting and across the already printed part. I believe this shaking motion plays a role in the aforementioned bubbles. Here is a vid of this.

My complete settings can be found here. Ive attached some pictures of the problematic regions. I do not have a picture of the bubbles currently, as this also appears to be an irregular event.


Happily looking forward to suggestions on how to remedy these nuisances,

Cheers !





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    Posted · Irregular blobs in large scale print

    Update: I finally discovered that the blobs appear to be drips being applied to the outer shell when the nozzle travels from the end of one layer to the start of a new one.

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    Posted · Irregular blobs in large scale print

    Update: the littles tongues are drips from when the nozzle finishes the outer layer and proceeds to start the infill.

    I can't believe I discover this now that it had driven me crazy enought to made a post.

    I am currently experimenting with zhop height, retraction and priming as well as printing the infill first to solve all remaining problems.

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