Prusa3D Forum - Recent Topics

CoreOne+ - Bed not moving to bottom position after print finishes.

Matt — Mon, 20 Apr 2026 07:39:24 +0000

Hi everyone,

yesterday I did a first print on my new Core One+ (factory assembled). The print turned out nicely. However I noticed that after the print finished the bed stayed at about half height. The panel indicated that the print finished (100%) the LED strip did light up green. It seems that the only way to get the bed back to the bottom is to navigate to the menu and adjust the Z-axis height manually with the rotary knob. This seems a bit odd to me. I'd expect the printer to move the bed all the way down by itself after finishing a print. Is this normal on a Core One+, is there any setting that makes the printer move the bed back down automatically once a print finishes?

Which sheet for ABS?

Melt — Mon, 20 Apr 2026 03:29:41 +0000

Hi all,

I‘m trying to print a few small ABS parts, and I keep having first-layer adhesion problems. I tried both satin and textured sheets, thoroughly cleaned with isopropyl alcohol 99%, even tried applying a layer of glue stick (which admittedly was very old), but the first layer adhesion is very poor so it starts coming off as soon as the nozzle ends one line and quickly moves to a new position.

I‘m puzzled because (1) the satin sheet is said to be very suitable for ABS as far as I found out, and (2) the glue stick method is said to work if nothing else does. However, the applied glue dried to a absolutely non-sticking dry layer on the 100C heat bed (well, maybe it was too old), and it did not improve adhesion even a bit.

So my questions are:

(1) is the satin sheet suitable for ABS (as noted even by Prusa) or not? Am I doing something wrong? Is 99% IPA maybe too concentrated?

(2) shouldn’t glue stick improve adhesion?

Thanks for any tips/opinions …

Melt.

Repair/replace/upgrade of MK3 extruder assembly

Preston L. Bannister — Mon, 20 Apr 2026 02:36:35 +0000

Got an extruder jam on my MK3 when printing face shield frames during COVID. Had to disassemble the extruder assembly to clear the jam, but two of the screws could not be removed. (The lower left part in the picture.) Did not have time, so put the MK3 aside.

More recently bought the upgrade kit to MK3.5S. So far as I can tell the E-Axis assembly is unchanged from MK3. (Original parts have the "C1" mark.) Currently printing the E-Axis parts from the "i3 MK3S+ printable parts" on Printables. (Hopefully I have enough spares or equivalents to the odd-sized screws.)

Printing the entire set, as I do not know if there are any changes in design from "C1".

Tempted to print the MK4 "Nextruder" parts, since I am re-building the extruder, but suspect that would not work out well.

Looking for a sanity check. Is there another alternative that makes more sense, given I have to re-build the extruder assembly?

Are we kidding ourselves about desiccant?

Conrad — Mon, 20 Apr 2026 00:34:35 +0000

I'm sure many do what I do- dry filament and put it in a zip-lock bag with a moderate size silica gel desiccant pack. Hopefully a pack that was recently dried, but I admit to not doing that as often as I should. I do keep them with indicators, so I know if there's a significant problem.

But thinking about it, I'm putting 1 kg of freshly dried filament with a large surface area in a bag with a small bag of gel that might or might not be as dry as the filament. Is the desiccant really buying anything or would it be better to just bag the filament, squeeze out as much air as possible and call it a day?