Trying to get a lower Durometer with the Fuse1 10W. Tried the wider (.32mm) Fill Hatch Spacing to no success. AI says change the Fill Laser Speed so there isn’t as much Dwell on the powder but wondering if anybody else has had success. Should I try much larger Fill Hatch Spacing?
fill_hatch_spacing_mm": 0.35,
fill_laser_power_mW": 8500,
this gives you around 60A
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Thanks! I’ll try it.
Fill Laser Speed is still 1111 mm/s?
I was able to get much lower Durometer with Fill Laser Speed at 2000 mm/s but terrible tear strength.
Have you tried faster Fill Laser Speed instead of lower Fill Laser Power? Wondering if this would give you the same results with faster prints.
I always prefer consistent results over speed. TPU is still faster than PA12.
I think speed has the same results as in other processes the faster you go the more chances of failure.
We’re you able to get less Durometer than 60A? Should I just try increasing Fill Hatch Spacing and decreasing Fill Laser Speed? Was worse tear strength always the trade off?
For my applications is not necessary to go lower than ~60A.
If you want to achieve less I will try 0.38 and reduce gradually power in 100 mW until you get the results you expect.
From my tests and produced parts no difference in tear strength so far
I tried the Fill Hatch Spacing at .38 and gradually lower Fill Laser Power to no success; the parts were just crumbling apart, maybe because I only have 25mm high part. Threw this all into AI and this is what it spit out:
Fill Laser Power: 9500mW, do not lower this. You need maximum heat intensity to ensure the “struts” of your foam actually melt together.
Fill Hatch Spacing: 0.38 mm was too wide; the melt pools couldn’t bridge the gap, causing the tearing. 0.25 mm was too tight; it fused into a solid block. 0.30 mm is the geometric limit for the Fuse 1 laser spot to maintain contact.
Fill Laser Speed: You likely tried speeds near 3800+ mm/s to get that “foam.” That is too fast for 10W. 2600 mm/s is the compromise: fast enough to prevent full density (keeping it soft), but slow enough to prevent crumbling.
I’m getting the super lower Durometer and foam like property I was looking for. Trying faster speeds and tighter hatch should get me more of a sponge like property. Will report my findings.
Update: It worked! By drastically increasing Fill Laser Speed to 5500 mm/s and setting Fill Hatch Spacing to 0.22 I was able to get very soft, foam like structure with pretty decent tear strength. Trying at an even higher FLS and lower 0.16 FHS. Wondering if anybody from Formlabs has tried it this way? Or if they tried only the FLP and FHS?
Glad I could share my findings and hope this helps some 10W TPU users in the future.