More PETG Setting Adjustments

So far its been almost two weeks since I started using PETG and I’ve resolved a lot of the problems I was experiencing in my last update.

Bed Adhesion Perfected

My prints are no longer becoming completely stuck to the print bed. Now, I can easily peel the completed print from the bed once it has cooled to about 45°C. Removing the print is almost trivial in how easy it is to do.

To achieve this, the first layer settings are very different to that of ABS. Smearing the filament into the bed is the wrong approach. It leads to nozzle jams and adhesion that causes the print to break. Instead, I have found that a first layer height of 105% of first layer thickness is needed. The extruded filament literally is laid down onto the bed. It looks as if it has no chance of adhering, however it is working perfectly.

Return of the Jam

After waxing lyrical previously how I’d fixed my nozzle jams by increasing the first layer height and reducing print speed, nozzle jams returned. They became quite significant. I was about 50% of the way into a print when they began occurring and I tried to salvage the print. Each time a jam occurred, I’d pause, remove the filament, cut the damaged filament off and insert it again and continue on. Continue reading

PETG Filament on a Da Vinci – First Thoughts

I have just begun printing from a brand new roll of PETG filament on my Da Vinci 1.0. Several reviews suggest that PETG is almost a hybrid of ABS and PLA.

I’ve used ABS for the vast majority of prints and whilst I have my printer printing ABS well, some of its properties frustrate me. They are; smell, poor bed adherence and warping.

PETG is meant to address the issues of warping and bed adherence.

My first print with PETG has been somewhat successful. Bed adherence was excellent; the filament printed straight to a clean glass surface that was heated to 80°C (the nozzle to bed clearance is 0.25mm). There was no warping or lifting of the print at the edges and the smell was not noticeable (I’m sure just because I can’t smell anything doesn’t meant there are emissions that are not good to be breathing).

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