What's the fastest you have printed?

What's the fastest you have printed while still maintaining decent quality?

(Is there a standardized model that anyone uses to compare?)

List them in a format like this:

My Printer
Type of 3D printer: Prusa Mendel w/ Linear Bearings
Print Speed: 50mm/s
Layer Height: .2mm
Type of Plastic: ABS

What is the fastest printer out there right now?

Same as you.

The problem isn't "print speed" it is "plastic output." Ultimaker can move 350 mm/s (so can prusa makergear2, incidentally). However, you couldn't flow fast enough or accurate enough to make that speed worthwhile.

If you wanted to truly print super "fast" as in 200 mm/s, you would need to make the layer heights 100 microns, and then print at a constant extrusion speed, because the printers can not accurate convey changes in extrusion speed at these speeds. The small Z height is necessary to enhance sticking and prevent other "globbing" issues due to surface tension at high print speed with a pseudoplastic.

Truly, the extruder gets at most 8 watts of power (from 15W or more) efficiency converted to melting plastic. What does this mean for you? Very very slow flow rates. In fact, 15 mm^3/s of plastic (thats 15 MICRO liters) is the limit, i.e 6.5 mm length of 1.75mm diameter filament per second.

An average print may be 40000mm^3 of plastic (40 mL/ ~grams) i.e. 1/25th a 1kg roll of filament. So at max speed (15 mm^3/s), this part (40,000 mm^3) is a 45 minute job, no matter how fast your gantry can move.

So there's the real limit, and why FFF needs a major revolution to pickup the pace and compete with CNC, injection molding, and now DLP 3DP.

Edited 1 time(s). Last edit at 02/27/2013 01:53AM by Simba.

Hello


Type of 3D printer: 3D Printer
Print Speed: 120mm/s (infill) I think I can go faster than that
Layer Height: .25mm
Type of Plastic: PLA

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This thread runs the risk of being bloated with inaccurate recordings, acceleration should be given alongside speeds.

I remember when the Ord bot users were first testing their bots on buildlog.net, thinking their machines were going at 1m/s because that's the value they gave slic3r!

IMHO for anything but square shapes, low feed rates and high accelerations print faster and better than just whacking your feed rate to 200mm/s. I can put my feed rate that high, but the acceleration has to be cripplingly slow to not end up with a messy blob.

konwiddak Wrote:
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> IMHO for anything but square shapes, low feed
> rates and high accelerations print faster and
> better than just whacking your feed rate to
> 200mm/s. I can put my feed rate that high, but the
> acceleration has to be cripplingly slow to not end
> up with a messy blob.


I never realized this. How does acceleration affect print quality, such as to make a blob? I would have though the faster the acceleration, the better, especially considering the delay between extrusion steps and actual extrusion from the nozzle, that you'd want to reach a fixed speed as fast as possible?

Faster acceleration helps up to the point where your machine starts to shake enough for it to be noticeable as a wobble around corners or curves. (or you skip steps!)

Lower acceleration also helps to lower the effects of oozing, because there's more time to build up and get rid of the pressure in the nozzle.

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...
Two opposite answers...lol.
ok, so accelerate slower compensates for the lag. Accelerate faster compensates for the lag.

I would run slower if i needed to have lots of stops and starts. I still believe the ideal is to print at a constant extrusion rate without ever lifting the nozzle, retracting, or any of those other types of optimizations. The up! mini was a good example of that kind of implementation.