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Super fast printing with Ender 3 Pro at 150 mm/s and 2000 mm/s^2 acceleration. Benchy in 1 hour 3 minutes.

I spent quite a lot of time in the past week trying to calibrate my Ender 3 Pro in earnest for the first time since I bought it. I did it at the same time as I installed the upgrades I ordered. My primary goal was to make the Ender 3 Pro print as fast as possible with as little power consumption as possible. This meant increasing feed rate and acceleration while having no bed heating (after a few layers) It turns out I can print a really nice Benchy in around an hour after some calibration and fine-tuning. I printed a couple of other models for testing various properties of this configuration, all of which were printed at 150 mm/s. You can see the results here . Observations: Really fast prints. Benchy finished printing in 1 hour 3 minutes. It usually took me ~2 hours at 50 mm/s. Overhangs were good until 70 degrees. No stringing in tower test, but some barely imperceptible stringing in Benchy. The surface area of the Benchy is really nice, but I saw some under-extrusions in the infills when I was watching it print. There were no stringing in the overhang test. A small string of filament that was originally stuck in the nozzle inadvertently attached itself to the other side of the Benchy. Fortunately, it wasn't actually melted into place removed itself in the process of detaching from the bed. I was very impressed with the calibration cube test result. There were no ghosting, ringing, or blobs at the sharp corners. The spike in the middle of the overhang test looks a little weird when inspected closely. I'm unsure yet what the cause is or how to fix it. Low power consumption at 80-90W after the bed heating turns off at layer 4. It's usually around 200-300W when bed heating is turned on the whole time. Other than the minor under-extrusions in the infills, the quality of the prints are very acceptable for me. I haven't printed any other functional models yet, but depending on how my next few prints will be, I may just keep the slicer setting at 100-150 mm/s as my default speed. For those interested, here are the upgrades and notable firmware/slicer settings I made: Upgrades: Printermods DirectDrive kit Antclabs BL Touch v3.1 BigTreeTech SKR v1.4 TMC2209 stepper motor drivers 5015 blower fan Raspberry Pi 4 4GB (Octoprint) Hero Me Gen 5 (single fan, dual ducts) Firmware Highlights Branch: Marlin 2.0.0-bugfix Sensor-less homing enabled BL Touch enabled Linear Advance enabled (LIN_ADVANCE_K: 0.12) DEFAULT_MAX_FEEDRATE: { 500, 500, 5, 25 } DEFAULT_MAX_ACCELERATION: { 2000, 2000, 100, 5000 } DEFAULT_ACCELERATION: 2000 DEFAULT_TRAVEL_ACCELERATION: 2000 JUNCTION_DEVIATION_MM: 0.06 Slicer Profile Highlights (PLA) Layer Height: 0.2mm Nozzle: 0.4mm Hotend temp: 200 C Bed temp: 60 C (turned off at layer 4) Print Speed: 150 mm/s Infill Speed: 150 mm/s Wall Speed: 150 mm/s Top/Bottom Speed: 75 mm/s Travel Speed: 300 mm/s Retraction Distance: 1mm Retraction Speed: 30 mm/s Combing Mode: off Retract Before Outer Wall: off Build Plate Adhesion Type: Brim More on reddit.com

r/ender3

May 19, 2020

Printing fast!

So I just started lurking in the voron subs and probably won't be building one for some time, so take this advice with a grain of salt:

Filament brand and alloy actually does make a difference - some melt much faster than others. I would start here and get a brand/formula that is proven to get the speed you're looking for, like one specifically mentioned in a high speed YouTube video or blog post. In fact, it wouldn't be a terrible idea to straight up cop a known working set of filament and machine settings from someone running hardware similar to what you have.
From what it looks like, people running at high speeds are using hotend temps above normal settings, like a video I saw of a speed benchy using ASA at 300 deg. I'm not sure if there's a safe upper limit to each type of filament, like it could combust or something, so maybe do some googling and see if that's a thing? Personally, if I couldn't find anything negative about it, I'd prob start running progressively hotter and faster temp towers until shit starts to make sense.

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