How to Keep PETG from Warping

How to Keep PETG from Warping

PETG, also known as PET-G, is a super cool, specialized plastic that’s used to make models with a 3D printer. Its thermodynamic nature allows you to print almost any design you could think of, but it can also easily warp if the conditions aren’t just right. Fortunately, there are a few simple tricks and adjustments you can try to help keep your PETG from warping.

Method 1 of 2:
Improving Grip on the Print Bed

1
Adjust the Z offset to make sure the print bed is level. Z offset is the distance between the hot end and the bed of your 3D printer. Slide a sheet of paper between the hot end and the print bed and adjust the height of the hot end until just barely touches the paper. [1] X Research source If your Z offset is too high, the filaments will stretch and warp. If it’s too close, it’ll squish the filaments and warp it. A level print bed will help the filaments stick and keep the print from warping.
2
Spread a thin layer of PVA glue stick over the print bed. Take a stick of PVA glue and apply a thin, even layer over the entire surface of the print bed to help the filaments stick to the surface during the print. Use a clear PVA glue stick to avoid adding color and contaminants to the print. [2] X Research source Make sure you don’t apply too thick of a layer or the print won’t adhere to it. Wipe off the glue with a damp cloth in between prints to remove the residue.
3
Spray hair spray over the print bed to help the filaments stick. Use a bottle of standard hairspray and hold it about 6–8 inches (15–20 cm) away from the print bed. Apply it by sweeping the nozzle back and forth to coat the surface of the print bed in a thin layer. The stickiness of the spray will improve the grip and help prevent warping. [3] X Research source You could also use a specially designed print bed spray, such as 3DLac to coat the surface.
4
Apply strips of painter’s tape over the print bed. Peel off strips of blue painter’s tape and apply them sticky-side down over the print bed. Align the edges of the strips so they don’t overlap and form a raised surface. Cover the entire print bed with the tape to create a surface with more grip for your print. [4] X Research source When you’re finished printing, peel off the painter’s tape and wipe down the print bed with a damp cloth to remove the residue.
5
Add a brim to increase surface area and improve grip. A brim is a layer of filament that outlines the print to create a wider bottom area. Set your Z offset to zero so it’s touching the surface of the print bed and bring a base layer of filament. Then, print on top of the base layer for an enhanced grip that will help prevent warping. [5] X Research source
Advertisement

Method 2 of 2:
Regulating the Temperature

1
Enclose the print chamber to keep the temperature consistent. Cover your print chamber with a prefabricated enclosure that fits securely and doesn’t have any gaps that could allow a draft in. Start your print once the chamber is covered to help keep the temperature inside constant, which will help keep the filaments from warping. [6] X Research source You could also cover the entire 3D printer with a cardboard box large enough to allow enough room for all of the moving parts in the printer to work unimpeded.[7] X Research source
2
Close the windows and doors to prevent temperature fluctuations. Drafts or circulating air can alter the temperature in the room, which can affect the temperature of the filaments in your print. Before you start printing, shut any openings in the room and turn off any fans to keep the temperature of the room from changing, which will help prevent warping. [8] X Research source Avoid adjusting the thermostat in the room while you’re printing as well.
3
Turn off the cooling fans for the first few layers. Your 3D printer has cooling fans directed at the print to help cool and harden the filaments. Turn off the fans for the first 3-4 layers of your print to help even out the temperatures and keep your model flat on the print bed. Once you’ve established a good foundation, turn the fans back on for the rest of the print so they can properly regulate the temperature. [9] X Research source If you’re able to control the speed of your fans, you can also try setting them to a lower speed for the first few layers to help create a more solid and consistent foundation.
Advertisement

Method 1 of 2:
Improving Grip on the Print Bed

1
Adjust the Z offset to make sure the print bed is level. Z offset is the distance between the hot end and the bed of your 3D printer. Slide a sheet of paper between the hot end and the print bed and adjust the height of the hot end until just barely touches the paper. [1] X Research source If your Z offset is too high, the filaments will stretch and warp. If it’s too close, it’ll squish the filaments and warp it. A level print bed will help the filaments stick and keep the print from warping.
2
Spread a thin layer of PVA glue stick over the print bed. Take a stick of PVA glue and apply a thin, even layer over the entire surface of the print bed to help the filaments stick to the surface during the print. Use a clear PVA glue stick to avoid adding color and contaminants to the print. [2] X Research source Make sure you don’t apply too thick of a layer or the print won’t adhere to it. Wipe off the glue with a damp cloth in between prints to remove the residue.
3
Spray hair spray over the print bed to help the filaments stick. Use a bottle of standard hairspray and hold it about 6–8 inches (15–20 cm) away from the print bed. Apply it by sweeping the nozzle back and forth to coat the surface of the print bed in a thin layer. The stickiness of the spray will improve the grip and help prevent warping. [3] X Research source You could also use a specially designed print bed spray, such as 3DLac to coat the surface.
4
Apply strips of painter’s tape over the print bed. Peel off strips of blue painter’s tape and apply them sticky-side down over the print bed. Align the edges of the strips so they don’t overlap and form a raised surface. Cover the entire print bed with the tape to create a surface with more grip for your print. [4] X Research source When you’re finished printing, peel off the painter’s tape and wipe down the print bed with a damp cloth to remove the residue.
5
Add a brim to increase surface area and improve grip. A brim is a layer of filament that outlines the print to create a wider bottom area. Set your Z offset to zero so it’s touching the surface of the print bed and bring a base layer of filament. Then, print on top of the base layer for an enhanced grip that will help prevent warping. [5] X Research source
Advertisement

Method 2 of 2:
Regulating the Temperature

1
Enclose the print chamber to keep the temperature consistent. Cover your print chamber with a prefabricated enclosure that fits securely and doesn’t have any gaps that could allow a draft in. Start your print once the chamber is covered to help keep the temperature inside constant, which will help keep the filaments from warping. [6] X Research source You could also cover the entire 3D printer with a cardboard box large enough to allow enough room for all of the moving parts in the printer to work unimpeded.[7] X Research source
2
Close the windows and doors to prevent temperature fluctuations. Drafts or circulating air can alter the temperature in the room, which can affect the temperature of the filaments in your print. Before you start printing, shut any openings in the room and turn off any fans to keep the temperature of the room from changing, which will help prevent warping. [8] X Research source Avoid adjusting the thermostat in the room while you’re printing as well.
3
Turn off the cooling fans for the first few layers. Your 3D printer has cooling fans directed at the print to help cool and harden the filaments. Turn off the fans for the first 3-4 layers of your print to help even out the temperatures and keep your model flat on the print bed. Once you’ve established a good foundation, turn the fans back on for the rest of the print so they can properly regulate the temperature. [9] X Research source If you’re able to control the speed of your fans, you can also try setting them to a lower speed for the first few layers to help create a more solid and consistent foundation.
Advertisement