![]() If you notice that the layer seems to stick initially, but later separates from the print bed as it cools, it is possible that your temperature and cooling settings are to blame. This is an important fact to keep in mind as you print your first layer. Because of this fact, the plastic will tend to separate from the build platform as it cools. If this ABS part cooled down to a room temperature of 30C, the 100mm wide part would shrink by almost 1.5mm! Unfortunately, the build platform on your printer is not going to shrink this much, since it is typically kept at a fairly constant temperature. Some printers also include cooling fans that speed up this cooling process when they are being used. If the extruder was printing this plastic at 230 degrees Celsius, but it was being deposited onto a cold build platform, it is likely that the plastic would quickly cool down after leaving the hot nozzle. To provide a useful example, imagine a 100mm wide part that is being printed with ABS plastic. Plastic tends to shrink as it cools from a warm temperature to a cool temperature. Each layer of your part is usually only around 0.2mm thick, so a small adjustment goes a long way! Be careful to only make small adjustments to this setting. For example, if you enter -0.05mm for the Z-axis G-Code offset, the nozzle will begin printing 0.05mm closer to your build platform. You can use the Z-Axis global G-Code Offset to make very fine adjustments to your nozzle position. To do this, click “Edit Process Settings” to open your process settings and then go to the G-Code tab. ![]() While you can adjust these settings by modifying the hardware, it is typically much easier (and much more precise!) to make these changes from Simplif圓D. For good adhesion to the build plate, you want your filament to be slightly squished against the build plate. Your goal is to locate your extruder the perfect distance away from the build plate - not too far and not too close. Once your bed has been properly leveled, you still need to make sure that the nozzle is starting at the correct height relative to the build platform.
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