Chloe Zhang
Plastic prints can be lifted using a printlifting polymer solution such as First Contact Printlifting Polymer Solution. This can be applied with a brush, by pouring, or using a pipette or eye dropper. In the context of 3D printing, lifting can also refer to warping, which is caused by insufficient adhesion due to an incorrect first layer. This can be prevented by ensuring the bed is clean and free from grease, using an adhesive, and maintaining a constant temperature to promote adhesion.
| Characteristics | Values |
|---|---|
| Cause | Insufficient adhesion |
| Solution | Keep the bed temperature constant at 60 °C or higher for the first layer |
| Use a higher extrusion temperature for the first layer | |
| Use an adhesive between the bed and the print | |
| Clean the bed with isopropyl/isopropanol alcohol | |
| Avoid placing the printer in front of a window or in the path of an air conditioner |
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What You'll Learn
Insufficient adhesion
To address this issue, it is recommended to ensure that the bed temperature is maintained at an optimal range between 50 °C and 75 °C to promote better adhesion. A higher extrusion temperature for the first layer can also enhance adhesion. However, it is important to note that while a higher bed temperature aids in adhesion for the first layer, maintaining this high temperature throughout the printing process can negatively impact adhesion and cause the print to sag.
Another factor contributing to insufficient adhesion is the presence of contaminants on the build plate, such as grease or resin residue. This issue can be resolved by thoroughly cleaning the bed with isopropyl/isopropanol alcohol before each print to ensure a clean and grease-free surface. Additionally, regular filtration and resin replacement are crucial to preventing resin contamination, which can reduce adhesion.
For resin 3D printing, the bottom exposure time and the number of bottom layers are critical factors in achieving good adhesion. Insufficient bottom exposure can cause the initial layers to peel as they lack a strong bond with the plate. Increasing the bottom exposure time and adding more bottom layers enhance adhesion and provide a stable foundation for the printed object.
In some cases, the use of a "raft" or "base" setting in the slicing software can improve adhesion. This setting, commonly found in FDM printing, creates a raft structure that enhances adhesion to the build plate and prevents warping and detachment. However, it is important to note that a raft is unnecessary for PLA printing and is more suitable for high-temperature filaments that experience significant shrinkage.
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Incorrect first layer
An incorrect first layer of a 3D print can be caused by a number of issues. The first layer is critical as it is the foundation for the entire project. One of the most common problems is a clogged or blocked nozzle, which can be caused by excessive debris or by hot plastic being kept inside the extruder for too long. This can prevent the filament from flowing freely. Incorrect extrusion settings can also cause issues, such as an incorrect extrusion multiplier or flow rate. Excessive retraction may also cause the filament to not start extruding at the beginning of the print.
The first layer may also not be adhering to the build plate, which can be caused by a number of factors. An uneven bed temperature, for example, can cause the edges of the first layer to curl upwards as the plastic cools and contracts. The bed should be completely clean and grease-free, and an adhesive can be used between the bed and the print. The bed temperature should be constant and high enough to promote adhesion; for PLA, this is around 60 °C, but it can vary depending on the composition.
Other issues that can cause an incorrect first layer include printing at high speeds, which does not allow the filament enough time to spread and adhere, and improper nozzle distance, where the nozzle is too close to the print bed, essentially blocking the opening. Slowing down the first layer print speed, adjusting the nozzle height, and levelling the print bed can all help to correct these issues.
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High bed temperature
When it comes to 3D printing, high bed temperatures can have several effects on the print process and quality. Firstly, high temperatures can cause the filament to soften and sag, especially in areas like overhangs and bridges. This is common with materials like PLA and PETG when there is insufficient cooling. The recommended bed temperature for PLA is between 50°C and 60°C, while for PETG, it is between 50°C and 80°C. If the bed temperature exceeds these recommended ranges, the risk of sagging increases.
Secondly, excessive heat can lead to curling or corner lifting. This occurs due to shrinkage during the cooling process, particularly in the upper layers. When the previous layers do not cool adequately, they deform, causing the corners to lift. This issue is more prevalent with high-temperature materials like ABS, PC Blend, ASA, and Nylon. These materials experience a significant temperature difference during cooling, which can result in warping and corner lifting.
Another consequence of high bed temperatures is the loss of detail in small elements. Overheating can cause the filament to lose its shape due to excessive heat or friction between the nozzle and the print surface. Additionally, high temperatures can cause stringing, where fine strands of filament stretch between different areas of the print. This issue is often observed with PLA and PETG and is worsened by elevated temperatures.
To mitigate the issues caused by high bed temperatures, several measures can be implemented. Firstly, it is essential to ensure adequate cooling, especially for layers close to the bed. This can be achieved by allowing more time for cooling or using higher-flow fans to pull in cooler air from outside the print zone. Additionally, the use of adhesives or additional adhesion layers, such as glue sticks, can enhance bed adhesion and reduce the temperature gradient over the part. Lowering the bed temperature for subsequent layers after the first layer can also help prevent sagging and improve print quality.
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Printer placement
Ventilation and Temperature Control:
Place the printer in a well-ventilated room to prevent overheating. Ensure a gap of approximately 100 mm (4 inches) between the printer's ventilation hole and any adjacent walls to maintain adequate airflow. Avoid placing the printer near a window, especially if it is exposed to direct sunlight or extreme temperatures. If the only available space is near a window, use blinds or heavy curtains to regulate the temperature and block direct sunlight.
Surface and Environment:
Place the printer on a flat, horizontal surface to ensure stability. Keep the printer away from devices that generate magnetic fields, strong physical shocks, vibrations, open flames, or exposure to salty or corrosive gases. Do not place objects on top of the printer, and ensure it is not exposed to dust or grease, as these can interfere with the printing process and affect print quality.
Temperature Regulation:
Temperature regulation is crucial, especially for 3D printing. Maintain a constant bed temperature suitable for the printing material. For example, PLA prints typically require a bed temperature of around 60 °C, with a higher extrusion temperature for the first layer to promote adhesion. Avoid placing the printer in a location where it will be subjected to drastic temperature changes or strong drafts, as this can impact the printing process and cause warping.
Additional Considerations:
Ensure easy access to the printer for maintenance and refilling. Consider the size and weight of the printer when choosing a location, and ensure there is sufficient space for ventilation and any necessary accessories or attachments.
By following these guidelines, you can ensure optimal printer placement, contributing to successful printing outcomes and reducing potential issues caused by improper placement.
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Grease on the bed
When dealing with grease on the bed of a 3D printer, it is important to take the necessary steps to ensure proper bed adhesion and avoid print lifting. Here are some detailed instructions to address this issue:
Identify the Cause
Firstly, it is crucial to identify the cause of the grease. Grease can be introduced to the bed through various means, including natural oils from fingers, residual cleaning products, or even environmental factors like air conditioning. For example, one user found that their dish soap contained oil, which regreased the bed after cleaning.
Clean the Bed
The next step is to thoroughly clean the bed to remove any grease. This can be done in several ways:
- Using a degreasing agent or dish soap: Choose a dish soap that is designed to cut through grease, and avoid those with added oils or hand softeners. Wash the bed with warm water and soap, scrubbing gently with a sponge.
- Using alcohol: Wipe down the bed with 91% isopropyl/isopropanol alcohol and a paper towel. This method is effective at breaking down grease molecules. However, it may not work for all types of grease, and it can damage certain bed coatings or adhesion layers.
- Avoiding common mistakes: Refrain from touching the bed with your fingers to prevent transferring natural oils. Also, ensure that sponges or paper towels used for cleaning have not come into contact with grease.
Improve Bed Adhesion
To prevent further issues with bed adhesion, consider the following:
- Adjust bed temperature: Try increasing the bed temperature by 5°C to promote better adhesion. For the initial layer, a higher temperature can be beneficial, but it should be lowered for subsequent layers.
- Use an adhesive: Some users have found success with using an adhesive between the bed and the print, although this requires more thorough cleaning afterward.
- Adjust printer placement: Ensure that the printer is not in a drafty area or in front of a window, as airflow can affect bed adhesion.
By following these steps, you can effectively address issues with grease on the bed of your 3D printer and improve the adhesion of your prints.
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Frequently asked questions
Plastic prints can be lifted by using a polymer solution, which can be applied with a brush, poured from a container, or used with a pipette or eye dropper.
The warping and lifting of plastic prints are caused by insufficient adhesion. This can be a result of an incorrect first layer, where the print is not sufficiently squished to the plate, or due to the plastic shrinking as it gets colder and farther away from the heated build plate.
To prevent plastic prints from lifting, ensure that the bed is clean and free from grease. You can use isopropyl/isopropanol alcohol to effectively clean the bed. Maintain a constant bed temperature of around 60 °C, and consider using additional adhesion layers such as glue sticks.
Yes, in addition to the above suggestions, you can try increasing the bed temperature for the first layer to promote adhesion. Be mindful that leaving the bed temperature too high for subsequent layers can decrease adhesion and cause the print to sag. Also, ensure that your printer is not placed in front of a window or in the path of an air conditioner, as airflow can affect the adhesion process.
