Slic3r Prusa Edition 1.40.1 - FINAL  

Re: Slic3r Prusa Edition 1.40.0-beta

I miss the 0.35mm layer version in the new Slic3r!

Why was it removed?

Any hints how I should best create one? Copy the settings from Slic3rPE-1.39?

Re: Slic3r Prusa Edition 1.40.0-beta

0.35 mm was replaced with 0.2 mm profile as it brings better results (higher quality and similar printing times). To explain the time, you can't push enough material through the 0.4 mm nozzle, 0.35 mm layer height at a given speed with adequate pressure, so you have to reduce the speed, therefore increasing the printing time, which is then similar as on 0.2 mm profile.

Also as written in this article for optimal printing results the layer height should be equal to the 50 % of the nozzle diameter, max is 80 %. Through the testing we came to the same conclusion.

Re: Slic3r Prusa Edition 1.40.0-beta

0.35 mm was replaced with 0.2 mm profile as it brings better results (higher quality and similar printing times). To explain the time, you can't push enough material through the 0.4 mm nozzle, 0.35 mm layer height at a given speed with adequate pressure, so you have to reduce the speed, therefore increasing the printing time, which is then similar as on 0.2 mm profile.

Also as written in this article for optimal printing results the layer height should be equal to the 50 % of the nozzle diameter, max is 80 %. Through the testing we came to the same conclusion.

Thank you for the explanation!

Do you know if the 0.2mm layer height is weaker than 0.3mm or 0.35mm layer heights? I was printing with 0.3mm layers to increase mechanical strength of surfboard fins, but I have not tested if it really makes a difference.

Re: Slic3r Prusa Edition 1.40.0-beta

I haven't tested it, but it sounds very interesting to compare different layer height with respect to the final strength.

Re: Slic3r Prusa Edition 1.40.0-beta

> avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

What system? Linux? I suppose you need to allow this port to be open by a non privileged application, or start Slic3r with su.

Re: Slic3r Prusa Edition 1.40.0-beta

> With 1.40.0-beta, I'm not able to connect to OctoPrint.
> When I configured the settings IP and API an test, it returns:
...

What system are you running on? Is there anything special about your network setup?

> Could not connect to Octoprint: HTTP 400: HTTP response code said error (22)
> Note: OctoPrint version at least 1.1.0 is required.

> My Version of Octoprint is 1.3.8.

Interesting. I suppose we should test the very latest OctoPrint.

> In the last version of Slic3r, it worked without any issue.

We rewrote the OctoPrint communication layer from Perl to C++, so there are significant changes. We tested the OctoPrint upload thoroughly though.

Vojtech

Re: Slic3r Prusa Edition 1.40.0-beta

> With 1.40.0-beta, I'm not able to connect to OctoPrint.
> When I configured the settings IP and API an test, it returns:
...

What system are you running on? Is there anything special about your network setup?

> Could not connect to Octoprint: HTTP 400: HTTP response code said error (22)
> Note: OctoPrint version at least 1.1.0 is required.

> My Version of Octoprint is 1.3.8.

Interesting. I suppose we should test the very latest OctoPrint.

> In the last version of Slic3r, it worked without any issue.

We rewrote the OctoPrint communication layer from Perl to C++, so there are significant changes. We tested the OctoPrint upload thoroughly though.

Vojtech

I‘m running an uptodate MacBook connected to a standard class c network, managed from a Fritzbox, all pretty standard.

Re: Slic3r Prusa Edition 1.40.0-beta

> avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

What system? Linux? I suppose you need to allow this port to be open by a non privileged application, or start Slic3r with su.

Yes, Ubuntu 16.04 LTS system.

I'll try if I can start the Appimage from a console as 'su'.

I really don't want to boot into Windows to update a fabulous open source machine! 😈

Re: Slic3r Prusa Edition 1.40.0-beta

I think this should help you to allow access to the serial line for a non-root:

http://quandtum.weebly.com/home/how-do-i-access-my-usb-serial-port-without-root-on-ubuntu-kubuntu

Re: Slic3r Prusa Edition 1.40.0-beta

Today I tried to switch from Simplify to Slic3er PE 1.4b. But I failed to understand Slic3ers extrusion width settings. In simplify I leave extrusion width to auto. So it will be calculated by simplify (usually nozzle dia * 1.2).

Usually I print a cube with just two shells. So if I set the extrusion multiplier correct the wall should be 2*0,4*1,2 = 0,96 mm (for 0,4 mm nozzle) thick.

Now when I set in Slic3er the extrusion multiplayer to the one I already calculated for simplify and leave the extrusion width settings on auto (which is 0). I get a cub with wallthickness of 0,84 mm.

It seems like Slic3er is using a different auto extrusion width than simplify. Why is that ? Or am I missing something different here ?

Re: Slic3r Prusa Edition 1.40.0-beta

This may explain you some:

http://manual.slic3r.org/advanced/flow-math

Also we have a hint at the "Layers and perimeters" page of the Print profile, where you will get the recommended thin wall thickness values.

Re: Slic3r Prusa Edition 1.40.0-beta

> Is there a way to turn on the 'Slice now' button when objects do not fit on the print bed?

No. It is an unusual request. You can always extend the bed dimensions. And you can copy the printer profile to yours, where you would have the bed extended, and then once you are ready to print, you may switch to the original printer profile.

Re: Slic3r Prusa Edition 1.40.0-beta

> But when I do try to use Slic3r PE I have a weird glitch. On my MacBook if I have the dock visible Slic3r will not go over the top of it. Basically as I open windows they all go over the dock like they should, but Slic3r sits behind it. So I have to manually go into my settings and hide the dock, or minimize
Slic3r. It is so annoying.

Is it this one?

https://github.com/prusa3d/Slic3r/issues/129
https://github.com/prusa3d/Slic3r/issues/925

Re: Slic3r Prusa Edition 1.40.0-beta

> I‘m running an uptodate MacBook connected to a standard class c network, managed from a Fritzbox, all pretty standard.

Which OSX version? We really need as much details as possible, otherwise we are stumbling in the darkness.

Would you please create an issue for this?

https://github.com/prusa3d/slic3r/issues

Re: Slic3r Prusa Edition 1.40.0-beta

i messed something up and lost all my settings from Slic3r 1.39.2 😥 😥 (the one that comes with prusa 2.1.5) Does anyone know where the config files are on a Mac?? I have an Apple time capsule, but need to find the file to recover...

Re: Slic3r Prusa Edition 1.40.0-beta

Try your Library -> Application Support -> Slic3r

Re: Slic3r Prusa Edition 1.40.0-beta

This may explain you some:

http://manual.slic3r.org/advanced/flow-math

Also we have a hint at the "Layers and perimeters" page of the Print profile, where you will get the recommended thin wall thickness values.

I see, thats a cool feature that slic3r is already calculating the wall thickness for 2 or 4 shells for me. I can use that to set the extrusion multiplier ...

One more question:

In the Print Settings/Advanced Slicer Tab for external perimeters it says:
set to "0": for default .. which is 1,05 * nozzle diameter I guess ?? (In the Slic3er manual for flow math it says (aka external perimeters) Slic3r will default to a thin extrusion width, equal to nozzle diameter * 1.05. )

"if set otherwise ..." 1,125 * nozzle diameter". <- I don't understand that. If I set the width to let's say 0,5 mm it will still calculate 1,125 * nozzle diameter ??

Re: Slic3r Prusa Edition 1.40.0-beta

Try your Library -> Application Support -> Slic3r

Thank you, thank you 😀 '

For some reason I had two different Application Support folders. All back to normal again 🙂

Re: Slic3r Prusa Edition 1.40.0-beta

I miss the 0.35mm layer version in the new Slic3r!

Why was it removed?

Any hints how I should best create one? Copy the settings from Slic3rPE-1.39?

it was removed because it was slower than the 0.2 profile because at 200mm/s the filament demand is more than the v6 can output. So there are no advantages over 0.2

Re: Slic3r Prusa Edition 1.40.0-beta

it was removed because it was slower than the 0.2 profile because at 200mm/s the filament demand is more than the v6 can output. So there are no advantages over 0.2

If you're printing multimaterial (in my case, with a Palette+), thicker layers have a huge advantage in dramatically reducing the number of filament changes and purges.

Fortunately it's not hard to make a custom profile with thicker layers. I hope thicker layers will return in the standard profiles once MMU2 is released.