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Improved Nylon reliability, strength, and surface finish
Drastically reduced bed scarring on bed probing
Improved bed probing for reliable perfect first layers
Shrinkage compensation for better dimensional accuracy
Reliability
Previously, the nylon temperatures have slowly been pushed hotter and with more part cooling to chase higher volumetric speeds, but we have recently found issues with nozzle jamming due to filament burning when deposition rates slow down in certain parts of a print.
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Lower print temperatures have allowed the need for substantially less part cooling, down from 35% to 20%. This combined with lower volumetric limits actually results in stronger parts than previous, while maintaining excellent quality and overhang performance.
Bed Probing
In the past month extensive testing has been performed on the mesh levelling performance and first layer quality and reliability. The following summarizes key learnings:
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the machine will heat the bed and wait until the top plate has reached at least 32°C
the ideal probe temperature is at 210°C to minimize PEI damage, but these temps are too low for filament on a dirty nozzle to be squished out of the way as the material will be solid, so instead the machine will probe above the melting point of the material (220°C for PETG, 240°C for nylon). These temperatures are set using the idle temperature box in the filament settings tab
after probing, the machine will then preheat to the actual print temperature before printing, but due to the elevated temperature, the hotend will expand downwards resulting in too low of a first layer height, a fixed, tuned offset is applied (+0.02mm for PETG and +0.05mm for nylons). These offsets are found in the custom g-code of the Filament settings tab for each material
Shrinkage Compensation
We have added our first new feature to Pantheon Slicer: shrinkage compensation. The new value is found in filament settings and has been tuned for each material to scale parts in XY to achieve improved dimensional accuracy.
Nylon Printing Tips
Read our new wiki post on getting the most out of your nylon here: https://pantheondesign.atlassian.net/l/cp/t3LMwikr
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