Prusa3D Forum - Recent Topics

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?

G-code Isn't fully compatible message - After upgrading firmware to 6.5.3

Bomantz — Sun, 19 Apr 2026 23:53:18 +0000

I have an MK4 with an MMU3.

Things were working fine until I upgraded the firmware on each. The MK4 was upgraded to 6.5.3. The MMU was upgraded to 3.0.4.

Immediately after the upgrade, I began getting the following warning:

The G-code isn't fully compatible

Nozzle flow rate doesn't match.

I've checked that the nozzle diam of 0.4 is set in both the printer and Prusa Slicer. I've also confirmed that the "High Flow Nozzle option is unchecked for each extruder in the slicer.

Any suggestions to get me past this will be appreciated.

Troubleshooting Unyielding x-axis waviness.

larrynotagain — Sun, 19 Apr 2026 20:18:32 +0000

Printer: Prusa MK4S MMU3

Filament: Prusament Galaxy Black PLA

I've been trying to fix this x-axis waviness, and am looking for help to understand the issue.

I've printed this exact same file after each tweak, nearly nothing has changed spacing and waviness.

The best results I had was to slow the printer down, from 250m/s from the general profile 0.20mm SPEED @MK4S HF0.4 profile, to the 0.20mm STRUCTURAL @MK4S 0.4 profile, (80 m/s) this solution is not acceptable. The waves were still there, just less pronounced but same location.

I've done these following steps:

Loosened and tightened the x axis belt, tuned it to 89 hz. Loosen it to 69 hz, tightened to 120 hz, zero change in the wave pattern.

Cleaned and re-lubed the Z axis and X axis.

Re-build the X axis carriage (not including the Nextruder)

tested every single screw for tightness.

Used both my and another's users profile, so no custom changes I've done.

Updated firmware to newest firmware.

Before I pull apart the Nextruder and try to realign the bearings, I'm looking for anyone's opinion on this issue.

I don't feel any snagging or pinching on the x-axis. Vase mode does not see these waves.

Any opinions are welcome.