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Comment on Calibrating my E-steps ended up giving me nearly pixel-perfect prints (Creality K1)

Is that hotend and nozzle actually able to keep up with the 48mm³/s flow rate needed to print at 600mm/s with 0.2mm layers?

I’ve been thinking about upgrading mine. The stock hotend can only do about 20-25mm³/s at reasonable temperatures.

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AliasVortex@lemmy.world ⁨1⁩ ⁨week⁩ ago
Agreed. Not to burst OPs bubble, but I highly doubt they’re hitting a flow rate that high.

If I had to guess, Orca is capping their extrusion move speeds at whatever speed the filament_max_volumetric_speed of their filament profile is set to. In other words, if the profile is set to 12 (default for Creality Generic PLA) the actual speed is probably something like 150mm/s (flow / (nozzle diameter * layer height), so 12 / (0.4 * 0.2)), regardless of what the speed value is set to.

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- tensor_nightly69@lemmy.world ⁨1⁩ ⁨week⁩ ago
  Yep, you’re exactly right! I forgot that I have the volumetric speed capped at 25 for the Turbo PLA (based that off of random reported values other people used, but didn’t think to try and benchmark it yet). So I’m gonna do that right now! The Overture Matte PLA also prints incredibly cleanly at 300mm/s, so I’m going to benchmark it and the Turbo PLA to see how high this hotend can go. I’ll report back when finished.
  
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spitfire@lemmy.world ⁨1⁩ ⁨week⁩ ago
I was able to get >35 (tested using Orca’s calibration) with CHCB-OT, but I doubt you can go much higher than that even with better extruder gears.

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- tensor_nightly69@lemmy.world ⁨1⁩ ⁨week⁩ ago
  Yeah, I unfortunately noticed that I didn’t get the CHT high flow nozzle, just the regular brass one. With my tests and high temps, I was only able to get right around 30mm/s^3^, so I need to order the high flow nozzle, which they advertise being able to get up to 50mm/s^3^.
  
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MysteriousSophon21@lemmy.world ⁨1⁩ ⁨week⁩ ago
The MicroSwiss FlowTech with a CHT nozzle can theoretically hit 40-45mm³/s, but in real-world testing most users report consistent 30-35mm³/s before quality drops off (depnding on filament and temps).

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