Prusaslicer z seam position

By ignace-de-keyserJune 2, in Ultimaker Cura. It has been a while since I have been on the forums, looks like the layout has changed, so i'm not sure if I am at the correct subsection. I was wondering if there is a way to choose the Z-seam. Instead of placing the Z-seam location inside the print, makeing it invisible, I was wondering if it was possible to explicitly move the Z-seam outside the print.

This way the Z-seam would not be part of the printed object. I tend to print Hollow prints, so putting the Z-seam on the insid to obscure it does not really work.

What do you mean by moving it outside of the print? The z-seam needs to be somewhere on the print. We do our best to prevent the effect of the z-seam, but it's not like we choose to create one. To fix the z mark you need to think like a slicer. How does it happen? Most of the time it's because the z changes without a retraction of the filament and this filament stretch makes some of the filament to follow, then the hotend starts to print making a change on preassure resulting on a z mark.

New cura has 'coasting' that if works well it should help. Coasting stops the extrusion X amount before ending a loop, this way there's less filament on the nozzle before changing z and returning to extrude. Other sollution that helps it's to retract before changing the z so there's less filament that can be stretched prior that z move. I don't use cura anymore so I don't know if they did that, but s3d does allow you to activate that option.

Also, since the z change occurs from infill to going to print the interior perimeter line, you could increase the perimeters so that mark its more hidden inside the print. Cura has never handled the seam well. I guess your information is pretty outdated. Cura 2. Back is simply silly. Is one supposed to rotate the part on the bed to get the seam where you want it, using Back?

Kisslicer is no longer being developed, but it has the best set of solutions for the seam so far.GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account.

In the meantime before having a big overhaul to enable this interactive seam placement, another thought would be options for:. Another nice feature would be an "aligned seam stagger" value. Have you seen this pull request? It is possible to use several lambdas at different heights, allowing to change the desired position as the model builds up.

It does provide a "strict" value, if set to low values, overhanging areas will be avoided.

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I'm aware that this differs from the idea of DrLex0 because it does not allow to use the "random" behavior for certain sections of the model, but it shows how seams and lambdas could work together and could be improved to match the ideas of DrLex0 and DjjC I have seen it and it certainly is a step forward, but I'm not entirely happy with the way it works.

If I understand it correctly, it creates a point-sized lambda that acts as a magnet for seam position. This works well for cylindrical objects but lately I had to print a spiral-like object and I wanted the seam position to follow the spiral at all times. To do that with the feature as currently implemented, I would need to manually position a lot of lambdas across the whole spiral, and positioning things in this UI is a bit awkward to begin with. Also, UI-wise it isn't clear in what zone the point-shaped lambda will have an effect.

It feels a bit strange that one needs to add a second lambda to cancel out the effect of the previous. Intuitively I would expect this kind of feature to work like other modifiers as follows. An imported mesh or generic lambda would be placed such that it overlaps with the object in the zone where the seam is desired.

The seam is placed within the overlapping zone s. Nearest uses the usual algorithm of preferring the most concave corner and so on. Random places the seam at a random point within the zone.

More options could be added as proposed by DjjC The weight parameter as in the current system can prevent placing the seam on an overhang, with fallback to the global setting. This would offer more flexibility in determining where seams will end up. For the common case of forcing the seam across a section of a cylindrical object, it would be practical to have a new generic that is a vertical half-plane with a certain Z start and height, and the option to rotate it around Z.

In that case some arbitration will be needed e.Matthew Harrison - Jul 19 I've recently been researching a lot about methods of reducing the visibility of seams in 3D prints. Commonly referred to as layer seams, z seams, blobs, zits, or scarring, the marks appear on prints either in a line or scattered around the model depending on slicer settings.

An example can be seen above on this cylinder. It's a universal problem for FDM printing and there have been a lot of different methods introduced into slicing software to hide it. The most common of these are coast, wipe, and of course spiral vase mode, but some slicers have their own special ways of dealing with it too. Here we will discuss how and why these seams occur, and what you can do about it.

Ironically, the most common names for these marks on prints aren't actually accurate. Layer seam, layer change seam and z seam imply that it occurs when the printer moves up to the next layer, however this is not the case. This can of course be confirmed by viewing a gcode preview, or even just watching the printer as it operates. From this we can see that the layer change actually occurs on the inside of the model where the infill ends, as that is the last part to be printed on any one layer.

Not important to the topic of seams, but perhaps of interest are the reasons why this order for the process of printing a layer is used. Firstly - why perimeters and then infill? Printing the perimeters first gives the infill something to adhere to on the edges as it is extruded. It acts as a containment area for all the infill to keep within. You can imagine that when printing at high speeds, it's very important that the plastic has something to stick to on the edges to keep its shape.

Again, this order is chosen to ensure that extruded plastic has something to adhere to as its printed.

prusaslicer z seam position

On parts that have overhangs, a fraction of the width of the outer perimeter is not printing directly on top of anything, so it helps to have something next to it to stick to.

Consider for example a model printed at 0. At a 45 degree overhang, two thirds of the width of the outer perimeter would be printing over air, leaving just one third of this width 0. And what is it attaching to? Not just the layer below, but also the previous inner perimeter loop for that layer. This becomes especially important as the overhang angle becomes steeper.

At an overhang of around 34 degrees, the entire outer perimeter would be printing with nothing below it. If this perimeter was printed first, it would simply fall down hopefully onto support material and not attach to the print at all.

If it has a perimeter beside it to stick to though, then it will remain attached to the rest of the print. I've attached an illustration of this example below:.

How to Control Seams In Cura Slicer Settings

So if these markings are not caused by layer changes like we originally thought, what actually does cause it? The answer is that it's just the point at the beginning and end of a perimeter.Unless the material being extruded has a very high viscosity it will ooze from the nozzle in between extrusions.

There are several settings in Slic3r to which can help to remedy this. The retraction settings, found in the Extruder section of Printer tab, tell the printer to pull back the filament between extrusion moves.

This can alleviate the pressure in the nozzle, thus reducing ooze. After the subsequent travel move the retraction is reversed to prepare the extruder for the next extrusion. Length - The number of millimeters to retract. Note that the measurement is taken from the raw filament entering the extruder.

A value of between 1 and 2mm is usually recommended. Bowden extruders may need up to 4 or 5mm due to the hysteresis introduced by the tube. Lift Z - Raises the entire extruder on the Z axis by that many millimeters during each travel. This can be useful to ensure the nozzle will not catch on any already laid filament, however it is usually not necessary and will slow the print speed.

prusaslicer z seam position

A value of 0. Speed - The speed at which the extruder motor will pull back the filament. The value should be set to as quick as the extruder can handle without skipping steps, and it is worth experimenting with this value to find the quickest retraction possible.

Extra length on restart - Adds an extra length of filament after the retraction is compensated after the travel move. This setting is rarely used, however should the print show signs of not having enough material after travel moves then it may be useful to add a small amount of additional material.

Minimum travel after retraction - Triggering a retraction after very short moves is usually unnecessary as the amount of ooze is usually insignificant and it slows down the print times. Set the number of millimeters minimum distance the nozzle must move before considering a retraction. If the printer handles ooze well this can be increased to 5 or 6mm. Retract on layer change - Movement along the Z axis must also be considered when dealing with oozing, otherwise blobs may occur.

It is recommended to leave this setting on. Wipe before retract - Moves the nozzle whilst retracting so as to reduce the chances of a blob forming. Additionally there are several settings in the Print tab which can help control oozing. Only retract when crossing perimeters Infill - Tells Slic3r to only retract if the nozzle will cross the threshold of the current island being extruded.

Slight ooze within the walls of a part are not seen and can usually be accepted. Avoid crossing perimeters Layers and perimeters - Advanced - Will force the nozzle to follow perimeters as much as possible to minimise the number of times it must cross them when moving around, and between, islands.

This has a negative impact on both G-code generation and print times. See also section : Sequential Printing for another technique which can minimise strings forming between objects.

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Retraction settings.PrusaSlicer is a feature-rich, frequently updated tool that contains everything you need to export the perfect print files for your Original Prusa 3D printer. PrusaSlicer is available for Windows, Mac and Linux. Get PrusaSlicer now! Full release log and the latest unstable builds on Github. PrusaSlicer is based on Slic3r by Alessandro Ranellucci.

It's completely free and open-source. Thanks to the strong community and core team of developers in Prusa Research we can continually add new functionality.

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You can follow the development process on Github. Slic3r was always known to be powerful and versatile, but some features were difficult to use, if not outright hidden behind obscure menus and dialogs.

Layers and perimeters

Our goal with the reworked UI was to expose all the power features while making the UI clear and simple to use at the same time. PrusaSlicer lets you create support blockers and enforcers. With support enforcers, you can turn automatic supports off and select specific parts which need supports.

We are adding profiles on regular basis, following materials by the most popular manufacturers. You will get new profiles automatically through auto-update function.

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In PrusaSlicer, you can select the layer height for each part of the object separately. Our software takes care of smoothing so the final print looks best as it can and the printing time remains acceptable.

Check out the video. PrusaSlicer includes built-in firmware flasher for Original Prusa i3 printers. You can just connect your printer to computer via USB cable and easily flash the firmware via PrusaSlicer. Don't forget to upgrade your printer regularly! You can prepare prints with color change directly in PrusaSlicer.

prusaslicer z seam position

With Octoprint application, you can control your printer via web browser. PrusaSlicer is now supporting advanced features of Octoprint like upload queue or Cancelobject plugin, which allows you to cancel printing of one particular object on the print bed.Thank you for your time. A seam of some sort is impossible to avoid with current fused filament printers. There are various options in the slicer you can select to alter the position of the seam, like random, aligned, rear, etc.

Normally the slicer on the default setting will try and hide the seam in the corners like it has done of the exterior of your pictured slice preview. However with a cylinder there aren't any corners.

Personally I prefer them lined up like that as its easy to ream the holes out afterwards and smooth them out with with a drill bit or a proper hole reamer if you have one to get the hole true to size.

I refuse to look at photos not posted on the forum Forum Icons: Forum contains no unread posts Forum contains unread posts Mark all read. Please Login or Register. English forum. Prusa Slicer 2. Last Post. New Member. I'm trying to get rid of a stubborn vertical seam in slicer 2. There must be a way to hide it somehow I just haven't figured it out. Log in to be able to post. Noble Member. Illustrious Member. Vase Mode Or use random seams on a well calibrated printer.

This post was modified 1 year ago by Tim. It is always wise to get more than one opinion All forum topics. Previous Topic. Next Topic. Forum Statistics.Layer height is the main factor affecting both:.

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By choosing taller layer heights you can significantly shorten the print time at the cost of more visible layers. On the other hand, choosing small layer height e. When printing with very low layer heights you might still want to print a thicker first layer to increase adhesion to the print bed. Original Prusa print profiles always use 0. You can express this as an absolute value e.

Changing the first layer height will most likely require adjusting the calibration of the first layer on your printer. Defines the minimum number of outlines that form the wall of a model. Original Prusa profiles always use a minimum of two perimeters. When printing anything with a single-perimeter wall, there is always a small flaw where the printer advances to the next layer. This scar is also a weak point of the print. Spiral vase does not have any such point where the layer changes, with the exception of the first N bottom solid layers.

Instead, the height is increasing gradually all the time, until the top of the print is reached. When the vase mode is activated, PrusaSlicer automatically sets related settings accordingly:. You can still adjust the number of bottom solid layers. The model should be defined as a solid. Otherwise, PrusaSlicer will try and fail to create both inside and outside surfaces, so model the outside dimensions only.

Only one object at a time can be printed in the vase mode. If you had multiple objects on the print bed, it would be impossible to print them continuously.

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You can get around this limitation by enabling Sequential printing. For a selected number of perimeters and layer height, PrusaSlicer calculates the optimal thin wall thickness. If you go back to your CAD drawing and change the wall thickness to this exact value, you will eliminate unnecessary perimeter overlap and your print will have perfect wall surface finish.

Normally you get recommendations for even number of perimeters 2,4,6…. If you enable Detect thin walls, you will also get a recommendation for an odd number of perimeters 1,3…. You may think, that when the extrusion width for a perimeter is 0. However, if you look at the recommendation for a 0.

In order to understand how this number is calculated, we need to take a look at perimeter cross-section. PrusaSlicer assumes that the cross-section of an extrusion is a rectangle with semicircular ends. Note that the extrusion width includes the two semicircular ends. If we suppose no overlap tangent pathsthere would be empty space yellow. In order to fill the empty space and bond the perimeters together, PrusaSlicer slightly overlaps the perimeters.

For more information, check the Slic3r Flow math page parts of this text are sourced from the same page. You can set how many top and bottom layers you wish to print. You can also set a minimum wall thicknesswhich is especially useful when using the variable layer height function. Setting the top or bottom solid layers to 0 overrides the minimum wall thickness.

So you don't have to set the minimum wall thickness to 0 as well in order to get top or bottom layers. The top solid infill is essentially bridging over the infill pattern. The lower the infill, the longer the bridging distance and as a result the bigger the sag.


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