Optimal speed without compromising quality

[joboman]

These are the speeds I currently use in MatterControl that I've had really good quality prints with. Can I increase any of these speeds with a significant reduction in print time and without compromising quality? Can anyone else post up their speed settings? I use the same speeds for PLA and ABS.

[bot]

You could probably take them all up to 50mm/s, except for the first layer depending on your adhesion requirements.

[Polygonhell]

It's worth noting that because of acceleration, path planning and minimum layer times, often even dramatic increases in requested speeds don't impact print times significantly.
You might want to time a couple of prints and compare quality at the requested speeds.

[bot]

That's very true. I find, though, that 70mm/s is the speed at which we start to get diminishing returns on increasing it. there is definitely still a difference between 50 and 70, for most models, it seems.

[DonFL]

Any guidance on how much of a print speed improvement going from the originally posted settings to setting everything at 50 would typically provide?

Reason I ask is I had comparably similar settings to start with, brought them up to 50 mm/s as suggested, and saw virtually no improvement in print speed..maybe a 3-5 minute decrease on a 1 hour, 35 minute print.

Even more curious is that a friend can print the same piece with a cartesian printer in about half the time. Its not completely apples to apples, as he's using PLA, but enough of a delta where it has me thinking there has to be some other settings I'm missing. I note the comment re other factors being involved, but does it makes sense that the delta printer lags behind the cartesian printer that significantly?

I am very new to this (just finished the Rostock V2 this week), so appreciate any and all guidance and suggestions.

[IMBoring25]

Is this comparison on a small part and what are your cooling settings? With PLA, your friend can run a part-cooling fan. With ABS, that's generally considered ill-advised, so printing on molten layers is usually avoided by setting a minimum layer time. You may never actually be using the print speeds you've set.

[Polygonhell]

Acceleration, Jerk and cooling settings become dominant very quickly.
The default Max acceleration values are pretty conservative, some Cartesian printers run as high as 9000, which will make a huge difference in print times as you increase velocity.

[Creator]

...some Cartesian printers run as high as 9000, which will make...

Not over 9000?!

[Jimustanguitar]

Any guidance on how much of a print speed improvement going from the originally posted settings to setting everything at 50 would typically provide?

Does your slicer tell you things like this? I know in Cura, you can tweak the settings and view their impact on the print time instantly.

I've been increasingly more content with hitting print and just walking away. The machine is going to take a long time, but that doesn't mean that I have to wait for it.

[jlmccuan]

Also note how many perimeter, top and bottom layers are being printed as well as type and density of infill. All these things add up. We ran our delta against a Makrbot with the Makrbot initially being faster until the number perimeter and top bottom layers was equalized and the infill was matched. Then the Rostock Max was done in almost half the time of the Makrbot.

[Jimustanguitar]

We ran our delta against a Makrbot with the Makrbot initially being faster until the number perimeter and top bottom layers was equalized and the infill was matched. Then the Rostock Max was done in almost half the time of the Makrbot.

This is 100% slicer settings. You were comparing an apple to a banana

[jlmccuan]

We ran our delta against a Makrbot with the Makrbot initially being faster until the number perimeter and top bottom layers was equalized and the infill was matched. Then the Rostock Max was done in almost half the time of the Makrbot.

This is 100% slicer settings. You were comparing an apple to a banana

Exactly. Everything must be equal to compare machines.

[DonFL]

So I installed repetier-host, still using slic3r. Print time, same part, went from 1:35ish to 55 minutes. Just started a test print so I can try to do some level of comparison re quality.

[geneb]

FYI, the host software has no impact on the print speed.

g.

[DonFL]

Makes sense, as I (am beginning to) understand it, its all about the slicer utility and parameters.