How do I stop my PETG from stringing?

Retraction distance: One way to reduce PETG stringing is to increase retraction distance, which means the nozzle will retract a longer section of filament before travel. Try increasing the distance in increments of 1 mm, using the stringing tower to see the effect.

How can I make my PETG stick better?

For the best chance of success, you will want to make sure you have a heated bed set to 65°C. Some PETG is more warp-prone than others, so higher temperatures may be required to give them enough adhesion to the bed. If you're having difficulty, bump the temperature up by 5°C at a time until adhesion improves.

How do you stop stringing?

To reduce the amount of stringing temperature is key. A high temperature means that the material will be more liquid, through which it can easily drip from the nozzle (even though retracted). By using a lower temperature the material is less liquid and thus less likely to string.

What causes stringing in PETG?

Keep PETG filament dry

Moisture can cause stringing, regardless of the material. This is because moisture creates small air bubbles in the filament that burst when the material is heated. This bursting can cause leakage of the molten filament, which leads to stringing if the nozzle is in motion.

How much is retraction for PETG?

We recommend starting with a retraction speed of between 30-80mm/s and a retraction distance of between 2-5 mm for a Bowden setup or 1-2mm for a direct drive printer. If you are having problems with interlayer adhesion or print quality, try printing a little slower.

PETG Blobs and Stringing, my best Solution!

Does PETG need heated bed?

Printing PETG requires a heated bed at 70°C - 80°C. We generally don't recommend heating your heated bed above the glass transition temperature of PETG (80°C ). A heated chamber is not required to successfully print parts in PETG.

Does PETG need cooling fan?

PETG will print quite nicely without fans. Unlike other materials that require fans during printing, PETG actually does better without them. If you notice cracks and delamination in your prints, turn off the fans because printing without them increases layer adhesion.

What humidity should PETG be stored at?

The optimal storage temperature for PLA, Tough PLA, PETG, CPE, CPE+, PC, Nylon, PP, TPU 95A, and Breakaway is between -20 °C to +30 °C. Store ABS between 15 °C and 25 °C and PVA between 10 °C and 30 °C. Furthermore, a relative humidity of below 50% is recommended for PVA, Nylon, and TPU 95A.

How do you remove moisture from a PETG?

One of the easiest ways to dry out PETG Filament is by using a regular home oven. For the best results, you should set your oven's drying temperature at 65-70°C (149-158°F) and run it for around 4-6 hours to completely dry out the filament. Make sure to clean out the oven before drying your filament.

How long does PETG last after opening?

Most PETG filaments can be stored for 2 years or more before it becomes brittle and cracks. You should keep it in a cool place and away from moisture or direct sunlight to make sure it retains its qualities as long as possible.

How do you keep filaments dry?

Filament is best kept dry in vacuum bags, a dry box or cabinet or a specialized 3D filament box. You can put it in a food dehydrator or an oven to dry it. A moisture-free environment is ideal for keeping your filament dry. Using desiccants in an enclosed area is the best method.

What is the best temp to print PETG?

PETG has a higher melting point than PLA and so, it is recommended that the extruder temperature is set somewhere between 210 and 250 degrees Celsius. It is important to ensure that the build plate temperature is set between 80 and 100 degrees Celsius.

Does fan speed affect stringing?

Prior to a move the print cooling fan causes the filament to cool on the outside while the nozzle is still hot, when it then moves it causes a strings to form that will be cooled instantly. This means that the cooling you have is too much and should be reduced.

How far should the nozzle be from the bed for PETG?

The ideal gap between the nozzle and bed is typically a distance of 0.1mm, this is the thickness of two pieces of paper. PETG sticks to itself very well and because of this, can stick to the nozzle during printing. To prevent this it can be beneficial to print with a slightly larger nozzle gap than you usually would.

Does PETG need raft?

For printing PETG, a brim usually works best, as long as you're using a thin layer of glue as well. That's because a raft means a larger surface area is connected to the bed, making the problem worse, and a skirt does nothing to provide adhesion or an easier part-removal process.

Should PETG be printed in an enclosure?

Overall, PETG is generally very easy to print with, as it requires no enclosure nor heated bed, making it compatible with virtually all FDM printers. It combines ease of printing with great strength and durability, making it a great filament choice for any print.

Does higher bed temp help adhesion?

While you can print without a heated bed in most cases, increasing the bed temperature results in a better first layer adhesion, and this translates to a better print quality and less warping overall.

What fan speed should I use for PETG?

For most prints, using a fan speed of 30–60% should suffice to prevent issues like oozing and stringing. However, only use the fan after the first few layers of the printing, as this will help to prevent warping, and remember that too high a fan speed will prevent interlayer bonding and result in a weaker PETG part.

How do I stop PETG blobbing?

Unwanted nozzle stops, back pressure, humidity, and dirty nozzles are the main reasons for PETG blobbing. Several methods like tuning print settings, drying filament, and cleaning nozzle can usually help you remove blobs.

Is PETG as strong as ABS?

For most people, there really isn't a reason to choose ABS over PETG. PETG is stronger, more durable, and it prints better. It's also available in transparent colors. ABS is only necessary if you absolutely need the 100 °C temperature resistance or its ability to be glued and painted.

What is a good layer height for PETG?

For PETG I like a first layer height of 0.28mm which seems to help with the build-up issue PETG is known for. There are a lot of users that swear you need to "squish" your first layer with a layer height of less than 0.20mm. This is normally to cover up another issue like incorrect speed or hotend temperature.

How do you dehumidify a filament?

Probably the easiest and most common way of drying filament is to use the oven. Just set the temperature to right below the glass transition temperature of the plastic, and leave it in there for four to six hours for the moisture to evaporate. The longer you leave it, the drier it'll get.

Is PETG waterproof?

PETG, a modification of PET, which is used in water bottles, is a great material for making waterproof prints. PETG is commonly considered to be waterproof and also has an excellent thermal resistance.

How do you make a filament dry box?

Will PETG warp in the sun?

PETG won't melt in the sun. Its melting point is 500 °F (260 °C), and the glass transition temperature is 176 °F (80 °C). Also, PETG is more resistant than other thermoplastic filaments to UV-A and UV-B radiation while being immune to the UV-C rays of the sun.