Warping is an issue which can`t always be resolved easily. But following next steps, can help preventing warping.

What is warping?

Warping occurs due to material shrinkage while 3D printing, which causes the corners of the print to lift and detach from the build plate. When plastics are printed, they first expand slightly but contract as they cool down. If the material contracts too much, this causes the print to bend up from the build plate.

How to prevent warping?

When you can prevent too much temperature differences on your model (bed temperature, nozzle temperature AND environment temperature), you can help reducing the chance for warping. Drafts can also make those temperature changes, what could lead to warping.

But, first of all, a good setup printer will reduce most of the warping problems. Next, per filament, there are other things to look at.

In most cases, lowering your bed temperature will help. But when temperatures are too low, your model will loose adhesion to the bed. You have to test with that.

Also tension in your print can cause warping. Gyroid infill (cura) gives you less stress in your model, minimizing chance on warping.

If your prints warps just a little, you could slice your print with a brim. Maybe a little bigger than default. Also using ‘mouse ears’ on the edges can help.

Using an adhesive like magigoo gluestick or 3DLack spray can help.

If you designed your print yourself, use filets the bottom of your print and prevent 90 degrees corners.

Warping with PLA

With PLA the changes of warping is small, but it can happen with large/long prints. Using a gluestick or hairspray can be your solution (after you cleaned the bed). You do not need an enclosure for PLA. But drafts and temperature changes can be a burden on long prints. A simple enclosure with enough opening at the top to get the heat out works great. But just putting a cardboard box around your printer can be a start. You can`t keep the temperatures constant like that, but for PLA that isn`t a real issue.

Warping with PETG

An enclosure with chamber around 45c is the optimum, but putting a cardboard box around your printer can help against drafts and keep the temperature a little more constant.

Warping with ABS/ASA

An enclosure with chamber around 55c and exhaust to the outside (fumes) is the optimum. You could put a cardboard box around your printer, but you can never keep the temperatures constant enough for ABS/ASA. It could help a little against drafts, but you still have the toxic fumes.