Community Digest

Top new questions this week:

PrusaSlicer: How do I preserve the location of (interlocking) parts in a muliti-part model exported from OnShape / Blender?

How do you import a multi-part object into PrusaSlicer without losing the position of the parts? For example, I want to print a two-material interlocking structure like this: I've tried exporting ...

slicing prusaslicer multi-material  
user avatar asked by RobM Score of 2
user avatar answered by RobM Score of 2

Is it safe to use 230 V AC, 10 A relay shield to turn my Prusa MK3S+ on/off using OctoPrint?

Prusa says the MK3S+ draws up to 120 W. So let's say 150 W of inrush current. $$150 W \div 230 V ≈ 0.65 A$$ An order of magnitude less than a typical Raspberry Pi optically isolated relay shield can ...

prusa-i3 power-supply raspberry-pi octopi  
user avatar asked by Mołot Score of 2
user avatar answered by 0scar Score of 1

How to secure silicone sleeve to my heater block?

My silicone sleeve dislodged from the heater block. Surprisingly, Prusa firmware correctly detected crash, pushed it out of the way and resumed print. I can just print without it, but I would prefer ...

hotend  
user avatar asked by Mołot Score of 2
user avatar answered by Trish Score of 3

Does FreeCAD produce a wrong stl for slicer software?

I designed a basic structure with FreeCAD. For the base, I started with a 40x40 mm square: And I extruded it with 6.5 mm: Then, I added a circle sketch with a radius of 19 mm: And applied 5.5 mm ...

freecad slicer  
user avatar asked by Daniel Score of 2
user avatar answered by Mołot Score of 2

Is it required to use a data-only USB cable to keep the LCD screen off, when a 3D printer has no other power provided?

I've noticed before that when I use a standard USB-cable to connect my Creality Ender 3 V2 printer using its USB port to a Raspberry Pi 4 and powered off the printer, that the LCD screen of the ...

creality-ender-3 electronics raspberry-pi lcd-screen  
user avatar asked by Bob Ortiz Score of 1
user avatar answered by K Mmmm Score of 0

What defines the 'straightness' of linear rods and how to measure it?

A few closely related questions about the straightness of linear rods. The 'straightness' of linear rods is vital for a 3D printer to function correctly and prevent things like Z-Banding or Z-Wobble. ...

z-axis linear-motion axis linear-rod  
user avatar asked by Bob Ortiz Score of 1
user avatar answered by allardjd Score of 3

How does Marlin firmware use filament width sensor data for flow control?

I found this great DIY 'filament diameter sensor' or 'filament width sensor'. It is called Inline Filament Diameter Estimator Lowcost (InFiDEL), as shown below. The GitHub project states: A cheap, ...

filament-sensor sensors filament-width filament-diameter width-sensor  
user avatar asked by Bob Ortiz Score of 1
user avatar answered by 0scar Score of 1

Greatest hits from previous weeks:

Ender 3 pro extruder skipping steps, tried multiple things

I've already asked this question somewhere else but unfortunately I had little luck. So... my Ender 3 Pro extruder just started skipping steps, as in the gears (and the gear pinion) will rotate but ...

creality-ender-3 troubleshooting hotend  
user avatar asked by vale.maio2 Score of 5
user avatar answered by vale.maio2 Score of 1

Why do I keep getting a thermal runaway message?

A few weeks ago I got a thermal runaway message on my modded Ender 3 during a print, and I have not been able to get it working since then! I have tried fixing and replacing everything, and I still ...

creality-ender-3 thermistor thermal-runaway  
user avatar asked by Twinkle toes Score of 5
user avatar answered by Kezat Score of 1

Ender 3 Pro will not auto home correctly after mainboard & BLTouch upgrades

I made two updates to my Ender 3 Pro: Silent Mainboard and BLTouch. My printer head is way out of sync now. After I Auto Home, it moves along the X-axis to the left, hits the stop switch & moves ...

creality-ender-3 bltouch creality  
user avatar asked by wallwalker Score of 4
user avatar answered by wallwalker Score of 4

How to format an SD card for Monoprice Select Mini V2?

I bought a 32 GB SDHC (Sandisk) I'd like to use for my Monoprice 3D printer. I have downloaded Partition Wizard and partitioned a 2GB primary partition formatted as FAT and it still does not show any ...

sd microsd monoprice-select-mini  
user avatar asked by Erik Blomberg Score of 8
user avatar answered by 0scar Score of 7

Is there a method for telling how much filament is left on a spool?

Other than unrolling it and measuring it, is there a method for telling how much filament is left on a spool, for example calculating a length bases on weight or number of turns left on the spook? Is ...

print-material  
user avatar asked by Aaargh Zombies Score of 5
user avatar answered by Zeiss Ikon Score of 11

PETG layer adhesion

I've been playing around with PETG for the first time, and everything seemingly worked right just from the start - clean prints, no stringing, no bed adhesion problems, no warping or dimensional ...

print-material adhesion petg  
user avatar asked by R.. GitHub STOP HELPING ICE Score of 9
user avatar answered by 0scar Score of 10

What kinds of gaps/tolerances should I use when designing pieces that fit together?

Let's say I'm modeling a simple box with a lid. Just as an example, we'll say the outer edge along the top of the box is 50 mm x 50 mm. With 3D modeling software, it's easy to build a lid for this box ...

3d-models  
user avatar asked by Joel Coehoorn Score of 25
user avatar answered by Serge Rabyking Score of 18

Can you answer these questions?

How to add a multi-color flush logo to a flat surface?

I've been banging my head against the desk for two days so it's time to ask for help. This is the second thing I've ever tried to design in Fusion 360, so very much a newbie. I'm trying to make some ...

fusion360  
user avatar asked by Craig W. Score of 1

Is it possible to read the state of a specific printer part from Marlin, such as the power of a stepper motor, the LCD brightness, or fan speed RPM?

Is it possible to read the state of a specific printer part from Marlin, such as the power (on or off) of a particular stepper motor, the brightness percentage of the LCD screen, or individual fan ...

marlin firmware electronics  
user avatar asked by Bob Ortiz Score of 1

Does Ultimaker Cura account for the printhead in the print space?

I'm currently trying to print a really tall item that is somewhat width dependent (it's a dice tower, so I can't make it too small or thin or the dice won't travel through it properly) and it reaches ...

ultimaker-cura  
user avatar asked by Nathan Score of 1
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