@phdussud @naPS @USMC6333 Great to hear your feedback on the Print Cooling Fan Upgrade Kit!
I wanted to share some valuable tips for ABS/ASA and PETG printing, which I gathered after having a discussion with our software team and an experienced J1 owner, Dylan.
Firstly, as you may already know, the cooling fan is integrated into the machine design, so there isn’t a separate control for it. The print cooling fan operates in conjunction with the extruder fans.
Additionally, the threshold of the print cooling fan is actually higher than that of the extruder cooling fans. As shown in the graph below, the print cooling fan kicks into action only when the fan speed setting value exceeds its threshold. However, it also means that the actual total air volume is not linearly related to the fan speed value you set in the slicer. Therefore, fan speed adjustment will require some patience and experience to find the perfect balance for your PETG/ABS/ASA prints.
Now, let’s talk about ABS/ASA printing. By default, the cooling fan is usually disabled for these materials. However, in cases where the ABS/ASA filament is modified, you may need to enable the fan a bit to get some cooling. Since the bed temperature is set above 90 degrees, you can consider enabling the cooling fan at a low speed (within 25%). This won’t significantly affect material shrinkage. A low fan speed setting won’t cause warping. It’s recommended to keep the fan off for the first 3-4 layers and add a Brim when printing large-sized models. Note: This advice is based on experiences with ESUN ABS and Kexcelled ASA.
Moving on to PETG printing, it’s advisable to use the cooling fan in the range of 10%-40%. If you’re using PrusaSlicer or OrcaSlicer, keep an eye out for the “Cooling Overhang Threshold” setting. Enabling the print cooling fan for printing overhanging structures can enhance the cooling effect.
By the way, I want to mention that Dylan has organized a discussion and testing session with another Chinese J1 enthusiasts to fine-tune the configuration parameters for OrcaSlicer. So stay tuned! https://github.com/SoftFever/OrcaSlicer/pull/1421
Additionally, the official Luban software has released a new version V4.8.1 with optimized material parameter configurations. We highly recommend downloading the latest version for an enhanced printing experience. https://github.com/Snapmaker/Luban/releases/tag/v4.8.1
Feel free to share your own experiences in the comments below. Let’s keep the Snapmaker community buzzing with knowledge and constructive suggestions!
Make Something Wonderful!