Archive for October, 2019

Inserting Weights Into a Print

Sunday, October 27th, 2019

While designing a (different) small box, I knew I wanted it to have a heavy base to keep it from being tippy. I designed recesses in the base for stacks of electrical box knockouts (that I’d been saving for recycling, because I’m just that way and I can’t help it) and had to look up how to get the printer to pause for me to insert them. Because I am not steady enough to play Operation, the Wacky Doctor Game when the patient is awake and trying to bat away my tools.

weights inserted into 3D print

In PrusaSlicer, the answer is to slice the object once, then grab the slider to the right of the plater and drag it down to the layer that you want the printer to pause before beginning to print. Hit the + button immediately to the right, telling PrusaSlicer that you want to do a manual filament change to make that layer be a new color, and then reslice. You can verify the pause with the slider; everything below the pause will be shown in one color and everything above in another.

When it finishes the layer below, the printer goes through a superfluous dance of unloading and reloading the filament, but it works out fine.

3D printer covering weights inserted into print

After resuming, the printer bridges nicely over the weights, just like it oughtta. Very gratifying.

PLA Shrinks Too

Sunday, October 27th, 2019

Everybody all, “ABS bad, it shrink when you print it,” and I’m, “Yo, dog, PLA shrink too.”

3D-printed PLA box

That’s a box with 2-mm walls and a 2-mm base. Hatchbox PLA. The layers of the base that are not stuck down to the hot build platform shrank right up.

Don’t be up in my grill about PLA being nature’s perfect filament. I need me an enclosure.

Calibrating Filament Diameter, Nozzle Temperature, and Extrusion Multiplier

Sunday, October 27th, 2019

With several filaments I’ve used lately, I get a rough surface on the top of my prints that makes me think the printer is depositing too much filament. I took a bit of time today to learn how to calibrate that; and one of the same tutorials gave a nice reference for nozzle temperature calibration, so I did that, too.

3D printer extrusion multiplier calibration cubes

These notes are as much for me as for thee, as I expect to run through this again with more filaments in the future.