3d print overhang test This overhang test print has a series of increasing angles to show at what point the printer begins to have trouble. #3DBenchy offers several challenging areas such as in the difficult-to-reach inside of the bridge. 0 reviews. Mar 26, 2018 · This object tests the capability of the printer to print overhang from 40° to 75°. I attempted the overhang test again at 235°C, 12. Poor bridging behavior often leads to frustration in 3D printing. It prints quick, around 30 mins. May 14, 2024 · Test the limits of your printer! Print-ready benchmark to test how far you can go without using supports! Fast, easy, filament friendly. How To Fix Overhang Issues. Choose on test object and print it with different angles (0-90-180-270) around the z-axis to check how much the maximal overhang angle depends on your object cooling. To print without supports it should be alrightish. Andreas Bastian researches, designs, and builds new types of 3D printers. The angles are, top to bottom:90°80°90°70°90°60°90°180°90°55°90°50°90°45°90°40°90°35°90°30°90°In short, the bottom part is 80,70,60 that should work on every machine and the top part is 55-30 in 5° steps so you can then find what overhead angles you can #2 Overhang Bridging Test. Scale the object up or down to fit for Dec 24, 2022 · Check out my new, updated test model! Test your overhangs and efficiency of your partcooling fan with this model. The print can also used to test roations on X,Y,Y-AxesOn two of the three pictures, you can see, the difference of the overhang by using different printer-speed | Download free and paid 3D printable STL files An advanced overhang test to accurately specify what angle you can print overhangs at, depending on what printer and material you are using. Moderate. Because of this I want to share my knowledge of what I have learned in the past years with the community. The objects have angles from 30-75, 30-80, 30-85 and 55-85 degrees. Here, enthusiasts, hobbyists, and professionals gather to discuss, troubleshoot, and explore everything related to 3D printing with the Ender 3. Have a good time! 1973 "overhang torture test" 3D Models. Members Online [deleted] ADMIN MOD Jan 25, 2024 · Calibrating your 3D printer can be a pain, but it doesn't have to be! Check out 20 3D printer test print models available for free. STL Files for 3D Printers. He has worked with FDM, SLS, DMLS, and SLA technologies and aims to make all more accessible. ilikeapples12 10000+ "bridge overhang test" printable 3D Models. Minimal time or filament needed compared to other tests of this style - 3D model of bridge overhang st Feb 23, 2021 · If you are having printing errors with this test, you are printing too hot or need to move the printer to a cooler room. Three curves including straight line, convex arc and concave arc are used to generate test form. To ensure you won’t get any unsightly drooping or breakages with your overhangs, this handy test will show you how well your printer settings handle overhangs from 45 to 70 degrees. This version can be printed in less than 20 minutes. Diameter Test - 32m. In the realm of 3D printing, mastering the art of creating perfect overhangs is crucial for achieving high-quality prints. However, the behavior can be easily optimized and even more easily tested. I had dialed the fan speed way down to promote layer adhesion, except for overhangs. It's designed to test angles from 20° to 70° with increments of 5°. This test is designed to see how well the printer can cool down the hot plastic as it is extruded; the better the cooling, the cleaner the bottom surface is. | Download free 3D printable STL models 3D Models 3D Printers Test Models. The general rule of thumb in 3D Printing is the overhang should not exceed 45°, any angle steeper than 45° should have supports. Retraction Towers Remix of ilikeapples12's overhang test with a rounded bottom to avoid warping and slightly larger bottom surface to | Download free 3D printable STL models Benchmark your printer to perform bridges (or overhangs) and see how far it can get. Dec 4, 2022 · The model is made of reduced size, the slope angle from 45 ° to 85 °, since almost any printer configured by default can print to 45 °. (over extrusion) Speed Boaty Challenge: Jul 2, 2021 · In this test I wanted to check how much of an angle of overhang I could print successfully on my Artillery Sidewinder X1 3D printer. This 3D Printer Test Cube is designed to evaluate various aspects of your printer's performance. In this video we discuss 3D printed overhangs and ways to improve them. The thin lower base allows you to bend when examining the layers of printing layers, the view from below. !NOTE!: If you are using Cura and you are experiencing missing text issue, be sure to enable "use thin wall" setting! Jan 12, 2023 · Separate Model Print Times . new features Z-Height CheckWarp CheckSpike Hole in wallRaft Testmore Overhang Steps 50° - 70° (needs special care, like cooling)2 different extrusion widths: 0. Please just keep all posts clean so that even children can use this site with their Aquila 3d printers. Nov 22, 2018 · This is a customizable 3D printer support test. Currently I own 2 Bambulab X1 Carbon, Prusa SL1S and a Prusa MK3S+. Support Test Models: Overhangs, Breakaway-Supports, Soluble Supports 4 Test Models for optimizing and trying out different Discover 3D models for 3D printing related to Overhang Test. Click to find the best Results for bridge overhang test Models for your 3D Printer. Bridging Test - 20m. Based on the same concept and design as the Massive Overhang Test by thingster ( http://www. To change dimensions click on the Open In Customizer button here. 100 reviews. May 21, 2019 · In this video I will explain what is overhang in 3D printing and how to test the maximal overhang angle for your printer, material and printing parameters. oupablo. It is louder but it spins 500rpm faster and blows a lot more air. small and fast printer test with overhang, bridges Overhang Test, Capability Test. I usually need to tweak settings for different filament more for the overhang results than anything else so I wanted a smaller test just for that. Print an overhang test to see where your printer/filament starts to sag and support anything beyond that threshold. Top Surface test (1 point) - The seat of the Boaty should feel smooth to the touch. Specifically, this model features a 75-degree overhang. This 3D model serves as a torture test for any 3D printer, assessing its capability to print steep overhangs without supports. Support Test - 22m. Sep 8, 2021 · The 3DBenchy is probably the most 3D printed object and most popular calibration test of all time, giving users a “torture test” that can be used to see how well a 3D printer can perform. Advertisement. It will help you identify the x and y directions later. Sep 21, 2020 · In 3D printing, the general rule to combat overhangs is to print angles that at 45° or less, where angles above this will start to be negatively affected by overhang. 4 Direction Aug 5, 2023 · A strange test print. Discover Things, Creators, Tags and more. Jul 14, 2021 · Recently I have been trying to get it dialed in and tuned to make really great prints. Up to 5 mm you will probably be successful. Print this with 100% Infill without supports. Aug 28, 2024 · CC BY-NC-SA This license allows reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator. Therefore, creating models with overhangs is more challenging Nov 19, 2023 · I started 3D printing since 2013 and have learned a lot since then. But overhangs came out shitty: I had: 0% fan @ 35s 20% fan @ 5s 100% fan for overhangs I then adopted the bambu ASA fan settings (leaving everything else the same): 25% @ 35s 90% @ 3s 80% for overhangs The result is much better Customizer for testing print overhang quality. 5, 45, 67. The sample was sliced with Cura 4. This is a stripped down mini test that only tests the overhang. Take a moment to visualize the letters Y, H, and T. These models are designed to highlight issues with stringing, oozing, and blobs, making them ideal for fine-tuning your settings. In addition, it includes a 20mm bridging test. Learn all of our tips and tricks for mastering extreme 3D printing overhangs! Mar 22, 2024 · 3D Printer Overhang Angle Test - 22. From 1cm to 10cm A simple multi directional overhang test ranging from 45° to 70°, ideal for testing the performance of part cooling. stl And not in the hands of the 3D printing or software giants who own the competing platforms and exploit the designs Jan 1, 2025 · 7. Cali-Dragon. It's a practical tool for calibration and troubleshooting, helping you There's an overhang test in MAKE's shootout model set, that increases the angle as the print gets further out. The small weight of the model saves print time and material. | Download free 3D printable STL models more Tests in the new Test your 3D printer! version 3. Easy. Pièce de Torture, 3D Print Test Jun 8, 2024 · An overhang test for OrcaSlicer and Bambu Studio | Download free 3D printable STL models 3D Models 3D Printers Test Models. 3D Print Retraction Test Calibration Models. myflodesk. Most 3D printers are capable of printing overhangs up to 45 degrees. Overhang angle, bridges & how to improve them. The cube is standing on one corner. This is a new modell, of my popular overhang test. I just can't get the overhangs to be clean. | Download free and paid 3D printable STL files Jan 14, 2024 · And not in the hands of the 3D printing or software giants who own the competing platforms and exploit the designs for their own commercial interests. The convex surface would give the worst scenario of warping while printing overhang. The Y’s arms form two overhangs at 45° angles, while the T’s crossbar presents two 90° overhangs. Jun 5, 2024 · Commonly, printers handle angles up to 45 degrees relatively well, but beyond that, issues may arise depending on the printer's capabilities and the filament used. @dusty. it uses a small amount of material of around 5-15g, depending what size you print, and it tests overhangs ranging from 45 degrees, all the way up to 80 degrees, this print can be a torture test for your printer since it also has many small towers to test Customizer for testing print overhang quality. Oct 25, 2023 · Why Would You 3D Print An Overhang? An overhang in 3D printing is an area of the object that isn’t directly supported by the layer beneath it or the build plate. This is a quick print, takes about 35 mins. S Dec 4, 2024 · 3D Benchy. No printing on its side, thats just cheating. Give it a try and see what your printer can do. Original Description: This compact model tests your overhang performance from 10 degrees to 80 degrees in 5 degree increments. Members Online Ender 5 S1 - Overextrusion on bottom layers? Overhang test (3 points) - On the bottom of the Boaty there are 3 arches to test overhang performance. It might be interesting to have an option that would have Cura lay out a pattern in a corner away from the main print job to get past this critical time period. They are a total mess in my opinion. This test includes : support test, scale test, overhang test, hole test, diameter test and bridging test. 25mm String Test - 28m. Feb 5, 2023 · After many failed bed level prints, and extrusion tests we were able to print a pretty good overhang test. The blue picture is the inside of the file. 5 mm/s speed for perimeters, 25 mm/s for infill, but still kept the fan at 30% speed and the print completed without anything curling up. This detailed guide delves into various advanced strategies and practical tips to help you optimize your messy overhangs, particularly focusing on overhangs, a commonly encountered challenge in 3D printing. More in 3D Printing Tests Explore Category. | Download free 3D printable STL models. However, you aren't allowed to use supports or a Welcome to the Ender 3 community, a specialized subreddit for all users of the Ender 3 3D printer. Quick Overhang Test. You can test both support from from build platform and support from material. Smaller layer height should make overhangs turn out better. Exodus @Exodus. 4mmThis is a hard to print testfile!often you don't know if your printer is ready for complex files. Every Day new 3D Models from all over the World. com/thing:40382 10000+ "test overhang" printable 3D Models. None of the actual testing part of the model was modified. In this model I eliminated some of the old ones issues (like bumping with the nozzle). Back of overhang test My original test case for this was frog model with more severe overhang, but I since made a simplified conical overhang test piece at only 50° that's faster to reprint and shows the issue: The frog print on the left is pretty much a complete failure. Discover. with this file you have an easy option to check problematic printing May 4, 2023 · The All In One 3D Printer Test is a single design that includes a support test, a scale test, an overhang test, a hole test, a width test, and a bridge test. Sep 23, 2023 · I’m trying to understand how to tune overhangs for my Polymaker ASA filament. View more articles by Andreas Bastian /r/3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices. This overhang tests angles from 10° to 80° with increments of 10°. Important: set the seam to an “inner” corner (aligned)! Pay attention to the text on the bottom side, when placing it on the printbed. Apr 11, 2022 · $\begingroup$ @Kilisi: I don't have a figure in mind, but I know I've printed some solid parts, including cosmetic surface quality, with convex overhangs over 70°. Additionally, it assesses bridging performance. Discover 3D models for 3D printing related to Overhang. I have produced my own model specifically to test the overhang and created it in Blender. 1963 "overhang test gcode" 3D Models. This 3 in 1 part tests bridging, overhangs and stringing using significantly less plastic than most tests available. The goal is to 3D print a 3DBenchy that can successfully handle overhangs, bridging, inclines, small details, and dimensional accuracy. Hole Test - 35m. overhang torture test; test; test overhang; test print; 3d printing tests; 3d printer; stress I feel like I want to agree with you about competing airflow causing turbulence but I have printed overhang tests on stock coolers with a one directional blower where I just flipped the model so the overhang faced towards and then away from the duct and the overhangs facing the duct turned out better. I have printed a temp tower, various test prints, and recently this overhang test. Overhang, bridging, detail quality. Aesthetic prints, overall print quality testing. Printing speed does affect cooling, so the lower the print speed, the more time for freshly laid down filament to cool before the next layer is ready. If the overhang test starts to look ugly at 70% then you're going to want custom enforcers at 30%. Concave surfaces Aug 28, 2024 · I made a Remix, a 4 side test for you to test the 4 basic Overhang printing angles at once. Mar 6, 2022 · When printing complex 3D materials, you can’t avoid a 3D printing overhang. The cube is standing on one corner. Jan 20, 2025 · What’s the best 3D printer test model for beginners? The calibration cube is the easiest and most informative model for beginners. When you print overhangs, as the angle increases, they first become dirty and ugly before the printed loops bend. Results from this test will help determine the Max Overhang Angle used for support generation. An Easter-themed model that is designed to stress test your 3D Printer. Aug 21, 2024 · a small overhang test | Download free 3D printable STL models. Remember that printing linear and concave overhangs is 1787 "overhang test" 3D Models. Follow Aug 5, 2023 · This Overhang Test© is made to test the capability of your printer. The success of a bridge depends on how much sag you are willing to accept. It has no tendency to warp during printing so gives a reliable test of the overhang performance. 80d Overhang Test - 1h 28m. Messages sharing tilt segments. Understanding May 6, 2021 · A simple multi directional overhang test ranging from 45° to 70°, ideal for testing the performance of part cooling. Dec 24, 2021 · However, that model was bending upwards during the print, due to the printed layers cooling down, so the model was pressing against the print head, causing some secondary issues with the overhangs. For example, STLFinder offers a large number of them for free. dusty . Jan 4, 2025 · 3D Models 3D Printers Test Models. English en. . Ranges from 90* to 44*, two angles, one degree per side. Overhang ability. How often should I run 3D printer tests? Run tests whenever you change materials, modify settings, or notice print quality issues. There's some stringing but no more blobs of filaments. In most cases, 3D print overhang issues include curling, drooping, and stringing. Good bridging test objects use as little filament as possible and offer multiple bridge lengths. This is an object in 4 versions to test the maximal possible overhang angle which you can properly print with your printer. What appears to be the final problem is with overhangs, and to a lesser degree bridging. Click to find the best Results for overhang torture test Models for your 3D Printer. 0, and printed in Hatchbox PLA at 206 degrees. If you are having problems with the print not sticking to the bed then I would look up guides on troubleshooting that. Adjusting your printer settings based on the results of this test, like cooling, print speed, and layer height, can improve its overhang capabilities. Detail handling, surface quality. Overhangs up to 45° can still be printed on 3D printers without losing the quality of the print material. There are angle marks at the top of the object. org! 10000+ "overhang test" printable 3D Models. May 23, 2021 · Although, all the overhangs in SLA 3D printing don’t require supports the overhangs that are at 19 degrees from the horizontal or more than 1. All of the tests are spread out well, and it's easy to check that the printing results are correct. Jul 1, 2023 · A necessary evil for makers is 3D printing overhangs. Apr 1, 2022 · 😎 Get your FREE FDM 3D Printing Glossary Here:https://itsmeadmade. If you want to ensure that your 3D print settings are good to go, you can use a 3D print overhang test file to check. 0 mm length requires support absolutely. Print calibration cubes, overhang tests, bridging challenges, and temperature towers to fine-tune your machine's settings. Each arc increments by 10 degrees from 0 to 90. one slices non-planar? Printer test piece for bridging, stringing and overhangs. A small 4 way test from 50-80°. After many failed bed level prints, and extrusion tests we were able to print a pretty good overhang test. Advanced. 3D printing settings. edit 23/02/20:Model updated to reduce filament use slightly Dec 1, 2023 · I liked the Overhang Test by @Permethious but wanted to speed it up a bit. If you slice to print walls from the innermost going outward, I can imagine that a convex overhang (with continuous curvature, not long straight segments) might work well even when only the innermost wall of the new layer sits on Feb 28, 2022 · All In One 3D Printer Test – this is a complex test for overhangs, support, holes, scale, diameter and bridging; it can help with calibration and figuring out the best settings and angles for overhangs Apr 30, 2023 · This model is used to test your printers ability to print overhangs and to test a slicers ability to add supports. ntproductions. The overhang angle is between 40° and 75°. 0 reviews Nov 10, 2023 · This blog is a 3D printer calibration test list for FDM 3D printers and resin 3D printers. It includes overhangs at 90 degrees, 75 degrees, 60 degrees, and 45 degrees. 456 Feb 3, 2024 · To test the overhang printing capabilities of the printer. The best STL files to evaluate dimensional accuracy, overhangs, bridging, retraction, and more. But if . Why is my overhang test failing? Poor cooling is often the culprit. - - - If you are new here, PLEASE see the sticky post - It has a lot of very helpful information to help you get started 3d printing with your Voxelab Aquila. Overall Extreme Printer Test: Overhang, Ringing, Stringing, First Layer, Pressure Advance, Accuracy Test (20x20mm) | Download free 3D printable STL models Feb 17, 2021 · A testprint to check the printers overhang possibility by printing a cube and three cylinders. Currently a 3D printing research scientist at Autodesk, he is also active in the e-NABLE 3D printing prosthetics community. It test for 40, 30, 20 and 10° overhangs. -1 point for every arch with drooping overhangs. This is just a quick slice job using Meshmixer. Overhang Test. Click to find the best Results for overhang test Models for your 3D Printer. For this challenge, you can use whatever nozzle size, layer height and scale you want. thingivers A little quick test print to see what overhang your printer/filament is capable of | Download free 3D printable STL models Oct 14, 2017 · A simple model to test the unsupported printing performance of your printer/polymer combination. overhang test. 5, 90 degreesCheck us out on www. Jul 19, 2017 · Overhang_Test. thingiverse. Allows you to customise the thickness of the sections, the angles, the number etc. These are only a couple ways to help manage overhangs on your 3D prints and we exper Overhang test | Download free 3D printable STL models. Print settings you must follow (it will print like vase mode): 3 walls; 0% infill; 0 top layers; 0 bottom layers; Z seam: aligned Jan 2, 2018 · Angle overhang test for 3d printing. This benchmark has 3 different types of overhang: straight, 90° angles and curves and the angle of the overhang embossed. Post a make Post a remix Collect Watch Report thing Tip designer Share. Detailed or decorative prints with complex shapes. I thought maybe others might have the same need for a quicker A testprint to check the printers overhang possibility by printing a cube and three cylinders. Click to find the best Results for overhang test gcode Models for your 3D Printer. The print can also used to test roations on X,Y,Y-Axes On two of the three pictures, you can see, the difference of the overhang by using different printer-speed Test your printer's limits with precision: explore our collection of test models designed to assess and optimize your 3D printer's performance. com/glossaryHow do the Cura support settings even work?! When do I need to add s Oct 10, 2018 · I decided to design All In One 3D Printer test, so here it is. It is designed for printing without the need for supports. A bridging test tests how well the 3D printer can print 90° overhangs. . Get to know GrabCAD as an open Jun 2, 2023 · Overhang Test. Fair warning: this is not an easy print! If you liked this model, why not try out our other stress tests too? RECOMMENDED PRINT SETTINGS. Low-Slope-Surfaces - These clearly show the layered structure of 3D printing. The three cylinders are attached to three sides of the cube. Click on images to download overhang test 3d printer STL files for your 3D Printer. Apr 23, 2019 · this is a model I created to test out longer bridges and large overhangs | Download free 3D printable STL models Mar 3, 2021 · It has been target of many efforts to print 90° overhangs without support on 3-axis 3D printers as with ordinary Z slicing, each layer requires a support underneath; hence, every overhang then needs a support structure if the model itself doesn’t provide it. Sep 21, 2019 · Sharing and downloading on Cults3D guarantees that designs remain in makers community hands!And not in the hands of the 3D printing or software giants who own the competing platforms and exploit the designs for their own commercial interests. (Smaller than shown on preview. Almost all of the site's revenues are paid back to the platform's makers. There are a bunch of similar models on Thingiverse but not as an Mar 7, 2021 · overhang_test_print_v1-0_20180802-67-boxhv. I created a new design with only the 45º - 75º segments since anything less than 45º is trivial for most printers. Your print times may be a little different based on settings. Most printers can get away with 45º angle overhangs, Ender 3 can go up to 60º with the right settings. Dec 1, 2023 · How well can your printer deal with an overhang? This print shows you just far your printer and settings will allow you to overhang before it starts turning to spaghetti. Click to find the best Results for test overhang Models for your 3D Printer. 2mm tolerance, and the ability to print intricate details like honeycomb patterns and thin vertical pillars. Testing cooling and overhang settings Explore customizable 3D designs tailored just for you. Made by: Gregori_MaxMakers description belowSummarySimple overhang test for testing and optimizing the capabilities of your printer. stl. | Download free 3D printable STL models Dec 17, 2022 · It test for 40, 30, 20 and 10° overhangs. Dec 13, 2023 · (3D printer overhang test) When printing overhangs on an FDM 3D printer, the part is built layer by layer, extending outward from the bottom, eventually forming a slope angle, and there is no support at the bottom. Feb 20, 2024 · To further observe your 3D printer’s capacity for overhangs, a more complex and easily botched part of 3D model printing. Hope you learn something from my blog after my years of experience in 3D printing. STLBase is a Search Engine for 3D printable Models and STL Files. This is a massive object to test and calibrate your 3d printer for better overhangs with relatively flat angles. Sep 19, 2024 · 5 minute design of an overhang test. Download your favorite STL files and make them with your 3D printer. ### Resolution Whatever you usually print at. Cults3D is an independent, self-financed site that is not accountable to any investor or brand. Update 2018-12-09 - v4 Oct 10, 2021 · --- ## Print Settings ### Rafts This print should be just fine without a raft. The physics behind this angle is that, when you picture a 45° angle, it is right in the middle of a 90° angle, meaning that 50% of the layer is support, and 50% of the layer is We would like to show you a description here but the site won’t allow us. It is obvious if you look at the text that is cut off at the bottom :). Groups. If you aim for overhangs up to 70 degrees, the right settings and the right material are basic requirements. Discover free 3D models for 3D printing related to Overhang Test. Using calibration models is one of the easiest ways to conduct a precise 3D print retraction test. The first part of the video shows how I construct the 3D model and how each upright overhangs by an additional ten degrees. It tests overhang capabilities, dimensional accuracy within a 0. Previous overhang test often test with straight lines, which is essentially bridging instead of overhang. Learn about the GrabCAD Platform. To test full capability, use only Jul 20, 2013 · 1) Almost every time I start a print when the hot end needs to warm up, the initial adhesion is bad for the first 30 seconds or so. We DO NOT require Benchy posts!! LOL 3D Models 3D Printers Test Models. Front of overhang test. 48mm & 0. Perfect for dialing in retraction, speed and temperature settings!Bridging range is from 20 to 80mm steps and overhangs are from 20deg to 70deg. This is uploaded from Thingaverse, not my own design. If printed horizontally, #3DBenchy’s gunwale and roof of the bridge will reveal the layer The simple object to test the maximum overhang 3D printer can deal with. Learn, discuss and share with other makers. All these things are explained in the post in detail. This is an overhang test that does use more filament than normal but gives a more accurate representation of how overhangs will behave in a real print. -1 if it is too rough. Have a good time! A customisable overhang test - i haven't finished cleaning up the wedges yet, but hopefully it will be useful enough. Fan recommendation: I recommend replacing the stock print fan on the Prusa MK3S(+) with the LDO 5015 Blower Fan. 3D Models 3D Printers Test Models. Overhang Surfaces - Overhang issues are the Achilles’ heel of 3D printing. Mini Printer Test (Overhang, Bridge and String) 3 reviews. Calibrate your 3D printer with these free test prints 3D models. This can be printed in under an hour and uses less than 8g of filament. Finally I came up with this half-bridge-shape, that ensures the model rigidity throughout the print. XYZ Dimension Test - 39m. /r/3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices. If you found it useful, give it a like! Check out my other test Performing an overhang test is a good way to find out what types of angles your printer can successfully create without using supports. You can find STL files for the 3D print cube test, 3D printer boat test, 3D printer overhang test, 3D print stringing test, and 3D print bridge test. woa zbku yxhie daotyh vgefp zklvszh fzpfwkve wzxre khveh sqxfv fpegbd wrt puymyq ekeczbd idvriuv