I always like to reduce it by 5mm/s or so, just to make sure I don't occasionally skip steps, so I would use 70mm/s. So the fastest speed you should put into your slicer is 75.1 mm/s. Max flowrate / ( layer height * extrusion width) = max output feedrate just divide your max flowrate by your layer height and extrusion width. layer height x extrusion width), we can use that to derive the max speed at which we can move the hotend. since the plastic we're extruding also a cross section with a fixed area (i.e. Now we've calculated the maximum cubic volume of plastic per second we can put through the extruder. Max input feedrate * pi * ( filament diameter/2) 2 = max flowrate to calculate the flowrate, just multiply your max speed by the area of your filament. Let's say our max speed before the extruder started skipping was 3mm/s (note: this is in terms of mm of filament going in to the extruder, not out). increasing the temperature can also up your max flowrate somewhat, but this also increases ooze and stringing when printing. it's important to use extrude long (50-100+mm) amounts of filament at a time, since a hot end can briefly go above its max flowrate before pressure has built up in the chamber. reduce the speed and then increase it slower than before, until you've dialed in the speed where it skips. repeat until the extruder motor starts skipping steps, or the filament starts grinding. You can calculate your max speed/feedrate for your particular setup with your max flowrate (v6s top out at a max flowrate of about 8-10 mm 3 /s, and volcanos top out somewhere between 20 and 30 mm 3 /s, depending on the nozzle.), the layer height, extrusion width, the filament diameter, and the temperature.Īs an example: let's say you're extruding 1.75mm filament at 0.2 mm layers at 210c, with a typical extrusion width of 0.48mm for a 0.4mm nozzle.įirst, heat up your hot end, raise it a decent bit above the bed, then use your host software to repeatedly extrude 50+mm, slightly increasing the speed each time. Non-reddit communities are listed in our getting started guide We welcome community contributions to this wiki! Related Communities Hit the report button or message the mods NEED HELP? WE HAVE A WIKI! First layer posts and spaghetti posts are now to only be posted on First layer Fridays and Spaghetti Saturdays respectively.Use the Stickied Purchase Advice Thread.News, information, links, help and fun related to 3D printing, 3D printers, additive manufacturing, etc.
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