How to Change Filament During Print?


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3D printing, a realm where creativity meets technology, has revolutionized how we bring ideas to life. At the heart of this innovation lies the filament, the key player that transforms digital designs into tangible objects. But here’s a twist in the tale – what if you need to switch filaments mid-creation?

This isn’t just about running out of material or craving a splash of color; it’s a nuanced skill that can elevate your 3D printing game. As someone who’s navigated the tricky waters of changing filaments during a print, I’ve learned that this technique is both an art and a science.

It’s not just about ‘How to Change Filament During Print’; it’s about mastering a skill that can significantly impact your final masterpiece. Let’s dive into this journey, exploring why and how this skill is a game-changer in the 3D printing world.

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Understanding the Basics

The Role of Filament in 3D Printing

Imagine your 3D printer as a gourmet chef and the filament as its choice ingredient. This filament is the thermoplastic feedstock for fused deposition modeling 3D printers.

It’s like the ink to your printer, but instead of splashing words on paper, it builds your 3D dreams, layer by layer. The filament comes in various materials – PLA, ABS, PETG, you name it – each adding its unique flavor to the final print.

Why Change Filament Mid-Print?

Now, you might wonder, why bother changing the filament mid-print? Well, picture this: you’re halfway through printing a cosmic vase, and you realize that galaxy-themed colors would make it stellar.

Or, you’re printing a model that symbolizes the ocean’s depth, transitioning from dark blue to light turquoise. That’s where the magic of changing filaments comes into play.

Sometimes, it’s not about aesthetics but necessity. You’re printing a large project, and suddenly, your filament spool looks more like a deserted island – nearly empty.

You don’t want your print to be a ‘nearly there but not quite’ story. Changing the filament can save your masterpiece from being an unfinished symphony.

Preparing for Filament Change

1. Gathering Your Tools

Before diving into the filament change, think of it like prepping for a crucial mission. You need your toolkit in order. First, grab the new filament spool – that’s your star player. Make sure it’s compatible with your printer. Next, have a pair of sharp scissors or a cutter.

You’ll need these to cut the filament at an angle, making it easier to feed into the extruder. Don’t forget a pair of tweezers or pliers; they’re lifesavers for grabbing small bits of filament during the change.

2. Setting the Stage

Now, let’s set the stage. Ensure your 3D printer is on a stable surface. You don’t want it doing a dance while you’re in the middle of a filament swap. If you’re using a spool holder, check that it’s secure and can handle the new spool’s weight. A shaky spool holder is like a wobbly table leg – annoying and potentially disastrous.

3. Safety First

On to safety – it’s not just a buzzword; it’s a must. The printer’s hot end can be scorching, so caution is key. Make sure you know how to pause or stop your print safely.

If your printer has a filament sensor, familiarize yourself with its workings. It’s like having a co-pilot, alerting you when it’s time to swap filaments.

Remember, patience is your ally here. Rushing can lead to mistakes, like snapping the filament or worse, damaging your printer. Take it slow, follow the steps, and you’ll be on your way to mastering the art of filament change.

Step-by-Step Guide

1. Manual Filament Swap

Pausing the Print: First things first, let’s hit the pause button. On most printers, this is straightforward. Navigate through the printer’s menu and find the ‘Pause Print’ option. It’s like putting your favorite TV show on hold – the printer stops, but it’s ready to continue when you are.

Removing the Old Filament: Once paused, it’s time to bid farewell to the old filament. Gently push the lever on the extruder to release the tension and carefully pull the filament out. It should come out smoothly, like drawing a straw out of a juice box.

Inserting and Feeding the New Filament: Now, take your new filament and cut the end at a slight angle – it makes feeding it into the extruder easier. Push the filament through the extruder until you feel it hit the hot end. Be gentle, like threading a needle.

Resuming the Print: With the new filament in place, it’s showtime again. Select ‘Resume Print’ from the menu. The printer will warm back up to the right temperature, and your print will continue from where it left off.

2. Manual Swap Without Pause

Preparing the New Filament: This method is like a relay race; you need to be ready to pass the baton. Have your new filament prepped and ready, cut at an angle for easier insertion.

Timing the Swap Correctly: Watch your printer like a hawk. You need to catch the moment right before the old filament runs out. It’s all about timing – too early or too late, and you could fumble the print.

Ensuring Continuous Printing: As the old filament gets consumed, gently feed in the new one, making sure it’s snug against the old filament. It’s a delicate dance, ensuring a seamless transition without pausing the print.

make sure you extrude filament until you see your reddit 210122 download | 3D Gear Guide

Continue extruding until you observe your new filament emerging from the nozzle. (Source: Reddit)

3. Modifying G-Code for Automated Pause

Using Software for G-Code Modification: For those who like a bit more control, modifying the G-Code is your go-to. Use software like Cura to tweak the G-Code. It’s like setting an alarm clock to remind you to change the filament.

Setting the Pause at the Desired Layer: In Cura, under ‘Extensions’, find ‘Post Processing’ and then ‘Modify G-Code’. Here, you can set the ‘Pause at Height’ parameter. Choose the layer where you want the printer to take a break for the filament change.

How to Create QR Codes Modify G Code in Cura 3D Printerly | 3D Gear Guide

Source: 3dprinterly

Resuming the Print After Filament Change: Once the printer pauses at the set layer, change the filament following the manual swap steps. Then, just hit resume, and the printer will carry on, incorporating your new filament into the print.

Changing filaments can seem daunting at first, but with these steps, it becomes a manageable and even enjoyable part of 3D printing. Each method has its charm, whether you prefer the hands-on approach or the precision of G-Code modification. Happy printing!

You can also watch this video. The video demonstrates how to replace filament on your 3D printer when it’s running low, enabling you to rescue your print from running out of filament. This method can also be employed to pause your printer.

Tips and Tricks

Navigating through a filament change is like steering a boat through uncharted waters – exciting but filled with potential pitfalls. Let me share some hard-earned wisdom to help you maintain smooth sailing.

1. Avoiding Common Pitfalls

Preventing Clogging: Clogging is the arch-nemesis of filament changes. To dodge this, ensure your filament is free from dirt and debris. Think of it as keeping your ingredients clean before cooking. Also, a good practice is to clip the end of the filament at a sharp angle before feeding it in, aiding a smoother entry.

Tackling Misalignment: Misalignment can throw your print off course. When you pause your print, be careful not to nudge the print bed or the extruder. It’s like a game of Operation – steady hands win the game. If your printer has a locking mechanism for the print head, use it to keep everything in place.

2. Ensuring Print Quality Post-Filament Change

Seamless Color Transitions: If you’re changing colors, a little overlap between the old and new filament can prevent gaps. It’s like blending two paint colors on a canvas for that perfect shade transition.

Temperature Consistency: Maintain a consistent temperature during the change. A sudden drop can affect how the new filament adheres, leading to quality issues.

It’s akin to keeping your oven at the right temperature when baking a cake – too hot or too cold, and your cake won’t rise properly.

Advanced Techniques and Considerations

Embarking on the journey of filament change in 3D printing opens up a world of advanced techniques and considerations. It’s like leveling up in a game, where new challenges and opportunities await.

1. Combining Different Filament Materials

The Art of Material Fusion: Mixing different filament materials in a single print isn’t just about aesthetics; it’s about functionality. Imagine printing a phone case with a rigid back and flexible sides.

The trick lies in understanding the properties of each material. You wouldn’t mix oil and water in a recipe without an emulsifier, right? Similarly, ensure the materials you choose can adhere to each other and handle similar print temperatures.

2. Managing Temperature Variations

Keeping the Heat in Check: Temperature plays a crucial role in how different filaments behave. It’s like adjusting the heat when cooking different ingredients.

Some materials need a higher temperature to bond properly, while others might warp or distort. Keep a close eye on your printer’s temperature settings during a filament change, especially if you’re switching materials.

3. Utilizing Filament Sensors

Smart Printing with Filament Sensors: Filament sensors are like your 3D printer’s guardian angels. They monitor filament flow and can automatically pause your print if they detect a run-out or a break.

This feature is a game-changer, especially for long prints or when using expensive materials. It’s like having a co-pilot, ensuring you don’t veer off course.

Mastering these advanced techniques requires patience and practice. Each print teaches you something new about the behavior of different filaments and how to manipulate your printer’s settings to achieve the best results.

Embrace these challenges, and you’ll soon be crafting prints that are not just objects, but stories of skill and innovation.

Troubleshooting Common Issues

In the world of 3D printing, encountering a few hiccups during filament changes is as common as a cloudy day. But fear not, for every problem, there’s a solution waiting to be discovered.

1. Tackling Filament Breakage and Printer Errors

When Filament Breaks: Filament breakage can feel like hitting a roadblock. If your filament snaps during a change or gets stuck, the first step is to stay calm. Check if there’s a tangle in the spool or if the filament has become brittle. Sometimes, simply unspooling a bit of filament and cutting a fresh end does the trick.

Printer Errors During Change: Printer errors can range from the printer not recognizing the new filament to software glitches. Start by ensuring that the filament is properly seated in the extruder. If it’s a software issue, a quick reboot of your printer can often reset the system and clear the error.

2. Solutions for Quality Issues

Maintaining Print Quality: So you’ve changed the filament, but the print quality isn’t what you expected. Maybe there’s a slight misalignment, or the layers aren’t adhering well. This is where fine-tuning comes in.

Double-check your printer’s bed leveling and ensure the nozzle temperature is optimal for the new filament. Sometimes, running a small test print post-change can help you gauge and adjust the settings for the best results.

Remember, troubleshooting is part and parcel of the 3D printing adventure. Each challenge is an opportunity to learn more about your printer and how to coax the best performance out of it. With a bit of patience and some tinkering, you’ll be back to creating flawless prints in no time.


As we wrap up this journey, remember that changing filaments mid-print isn’t just a necessity; it’s a doorway to new possibilities. From tackling the basics to exploring advanced techniques, each step is a learning curve that enhances your 3D printing skills.

Embrace the challenges, experiment with different materials and colors, and always prioritize safety. Your 3D printer is more than a machine; it’s a tool for creativity. So go ahead, push the boundaries, and watch as your prints take on a life of their own, one filament change at a time.

Shamim Ahmed
Shamim Ahmed
I’ve been an innovator in this space for years and am really excited to share my knowledge with you. I’m an entrepreneur and love helping others achieve their goals by teaching them how to build a business around the newest innovations in technology.

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