elegoo mars 2 troubleshooting

How To Cure UV Resin Without UV Light: Is It Possible? You want to make sure your print is not under-supported. If your exposure settings are good, you might have to do an exposure check. ), Pre-owned Machines: 4-8 workdays for delivery (All the pre-owned products would be tested before shipping), Pre-orderProducts: Wewillshiptheproductaccodingtotheestimateddeliverytimeonthepage, 1. If your normal exposure is too low, it can result in the cured resin being flimsy and weak. PS:After printing all the firmware files, you need to restart the machine to make the new firmware take effect. 0: 389: Please do not update repeatedly to avoid being prompted "Same Firmware already exists! If you find yourself with G-code for a file that no longer exists and you Is PETG Toxic? Begin by using the correct printers for the right tasks all the time. ELEGOO Printers Resin Setting Sheet 2. Check out their resins on Amazon http://go.toms3d.org/SirayaBlu or from Siraya Tech directly at https://sira. How to avoid bleeps on the Washing machine, 2. Switzerland (As we ship from the EU warehouse, buyers are required to pay customs duties and import VAT.). Plug the Elegoo Mars into your computer Go to the Elegoo Mars folder on your disk and click through to the Root Directory Paste the files and click "yes" to replace the files Restart the Elegoo Mars. I have also experienced this a few times in my resin 3D printing journey. That means you will have problems and you wont always know what to do about them. TERMS & DETAILS: More information about this protection plan is available within the "Product . You should fix any over-extrusion issues that you, Read More 5 Ways How to Fix Scars or Scratches on the Top Surface of 3D PrintsContinue, When it comes to resin 3D printing, there are so many brands and types of resin that you can make use of on your 3D printer, but which ones are the best? If your 3D print design doesnt have enough support, if it has loose parts that break or warp, or if its too complex for the nozzle to navigate around, you could get layer shifting. The Mars Pro is not adjustable, so if youre having tension issues, youll have to replace the arm instead. 2) Scroll the mouse wheel to zoom in or zoom out the model. It may be that your resin is experiencing under exposure, so Id also try increasing your normal exposure times by 20-50% and seeing if that helps fix this issue. Multi-language Interface This can lead to the model coming unstuck from the bed as the process is still ongoing, causing serious cracks and other deformities that render the product unusable. English Version: Click to download-link 1 or link 2 - Google Drive, Japanese Version: Click to download-link 1 or link 2 - Google Drive, Offcial suggestionsfor ELEGOO resin on ELEGOO Printers:ELEGOO Printers Resin Setting Sheet, Firmware V4.5.0-1.0-e21_LCDM21_4098X2560_F23.32-link 1 or link 2 - Google Drive. Increase the normal exposure times to strengthen the supports and foundation of the print layers. If your first print test isnt curing, it likely means your LCD may not be working properly. The machine should beep and That's it. A product you are printing coming out with a messed up deformed look that gives it an appearance of something that is half burnt is very common. Users that have an Elegoo Mars can sometimes go through failures and problems. Elegoo Mars & Saturn Users Forum - Dedicated to the Elegoo Mars and Saturn 3D Printers. Sometimes incorrect use will cause the shortening of accessories lifespan. Reason: This problem is caused by insufficient support. (Do This!). If you have just gotten your Elegoo Mars and it is not printing at all or your old one just suddenly stops printing, here are methods you can use to troubleshoot the issue. If you have consistent horizontal lines or failures, and you have tried many methods in this article to no avail, you may have a Z-axis carriage that has too much tension. US West: Arizona/Arkansas/California/Colorado/Idaho/Illinois/Iowa/Kansas/Louisiana/ Minnesota/Missouri/Montana/Nebraska/Nevada/New Jersey/New Mexico/North Dakota/Oklahoma/Oregon/South Dakota/Texas/Utah/Vermont/Washington/ Wisconsin/Wyoming/, We do Not support delivery to PO BOX addresses, please kindly understand., 7. The temperature under which you carry out your resin 3D printing is important to a successful print. .025mm Slices 1.4s exposure with 30s base layers, 40mm/min retract speed and Printed with Siraya Tech Fast grey resin. You may want to tilt the model some degrees away from the surface and add good supports. Mac InstallationTutorial: Click to view, 3. Please check the product listing and checkout page for specific costs. That could be because of settings. Login Register . Make sure when you hollow the model, there arent parts too thin on a layer basis. The most common characteristic of this problem is the nozzle running as usual but nothing coming out to the printing table. Caution:The.SH4 file will be automatically updated after restarting the machine in the shutdown state. Thats especially true because the Elegoo doesnt have a native card reader. 3) Long press the right click to see different perspectives of the model. https://www.pinterest.com/pin/433893745329372319/. used, the model may even splinter in half due to the stress being applied. Everything I know comes mostly from Reddit and Youtube. You should reduce the temperature of the bed gradually as the first layer is being placed to make sure the first layer sticks properly. is usually fed into the printer at a constant rate. Neptune 2 & 2S: Click to view-link 1 or link 2 - Google Drive, 2. Elegoo Mars has a built-in bootloader, and you cant overwrite that by making a mistake. , get the best that money can buy. Go to the Elegoo Mars folder on your disk and click through to the Root Directory, Paste the files and click yes to replace the files, Restart the Elegoo Mars. ELEGOO Mars 2 MSLA Resin 3D Printer with 2K Mono LCD $200.00 $119.99 Why choose Elegoo 3D Printers? Test Model: Click to download-link 1 or link 2-Google Drive, 2. How to replace the linear rail sliding block? Dear subscribers, Thank you for subscribing to us and participating in April Giveaway Week event. This will increase the distance between the opening of the nozzle and the printing bed. https://www.pinterest.com/pin/117726977737513841/. In general, you want no aliasing for very fine-finish prints, and then increase the anti-aliasing based on reduced detail on the model. This includes that the display cable might have come loose from the mainboard. Another quick solution would be to clean the bed before the printing process to get rid of dust which may block the filament from sticking. This is a defect that is hard to ignore as it affects the functionality of the affected product. Level the Build Platform 5. Congratulations to all the lucky guys in the picture below for winning a GIFT from ELEGOO. There could be quite a few things causing layer shifting. This article will take you through a series of fixes that have worked for other users with the same issues. I ground the end of mine to at 30 or so single edged bevel and the polished it up with 320 grit paper leaving a very slight radius on the non-beveled edge. If its been in the vat too long, you should stir it to reduce separation issues. Here are my settings, and the most recent print (the big guys are hollow). As the technologies behind 3D printing continue to improve, the chance of these issues popping up will be lesser. https://www.pinterest.com/pin/33565959706819144/. The success of a 3D printing process is determined by how fast the first layer solidifies while sticking to the bed. This could destabilize the structural integrity of the final product, making it heavy in some parts and too thin on others. English Version: Neptune 3-Click to view-link 1 or link 2 - Google Drive, 2. It could also have something to do with the software thats glitching or a partially blocked nozzle. Caution: Please make sure whether this firmware matches your printer, wrong update across different printers may turn it unusable. At the same time, if its set too high for a high-detail print, you could lose details, resulting in a blurred finish and layer shifting. Recalibrate the multiplier setting by keying in the right values to avoid a repeat of the same issue. I am wondering if any one else has had this issue and what they did to fix it ? Filament is best kept dry in vacuum bags, a dry box or cabinet or a specialized 3D filament box. If theres still residue, use isopropyl alcohol to get it off. How to correct the "no authorization" error when updating the firmware, USB Drive Files (Manual & Slicing Software included)-link 1 or link 2 - Google Drive. ELEGOO Saturn 2: How to replace the PFA film. Step 3: Press "Tool" - "Manual" - "Home" and wait Z axis goes down and stops. Have a look at your FEP sheet and see if there is any cured resin that is covering it. If youre not sure, its okay to unplug and plug things back in. If yourSaturn 8K machineneeds to replace the LCD screen, please follow all Hello, guys. Simple Elegoo Mars UV 3D Printer Review - Worth Buying or, 5 Ways How to Fix Scars or Scratches on the Top Surface of 3D Prints, 7 Best Resins for 3D Printers Best Results Elegoo, Anycubic, 7 Most Common Problems with a 3D Printer How to Fix, How to Fix Mesh Bed Leveling Not Working Marlin, Prusa & More, 4 Awesome Ways How to Keep Your 3D Printer Filament Dry, How to Fix OctoPrint Issues Keeps Printer On, Disconnecting & More, Troubleshooting Issues with the Elegoo Mars Causes & Solutions, Elegoo Mars Print Layers Separating Suction Pressure, Elegoo Mars Build Plate Not Staying Level, Horizontal Lines Showing on Elegoo Mars Prints, Low Operating Temperature for Resin Printing, Other Troubleshooting Fixes for the Elegoo Mars, How to Fix Resin Prints Sticking to FEP & Not Build Plate, How to Calibrate Resin 3D Prints Testing for Resin Exposure, Elegoo Mars print fell off build plate/build plate adhesion, Suction pressure separating printed layers. It can be disappointing when you have gone through the process of modeling and printing to see that only the supports are getting printed. Please do not update repeatedly to avoid being prompted "Same Firmware already exists! Apr 25, 2023. fizzPOP - Birmingham's Makerspace, is run on a non-profit basis to serve the creative interests of members and non-members alike. Shake up your resin vigorously to help mix it up, then place it in a bucket of hot water. 2023 3D Printerly - WordPress Theme by Kadence WP. The nozzle is one of the most important parts of the machine. Here, you can use a Phillips #1 screwdriver to remove the back cover. The most common cause of this problem is using a cheap filament that snaps easily. A glitch in the software running the printer could be the other culprit behind all this. Some can be solved on the spot with a few changes to the printer, the. If its low, the access points are blocked, or the resin is very low quality, your printer may not print. You may have adhesion or support failures too if your build is not staying leveled. Subscribe to getthe latest special offers, free giveaways, and once-in-a-lifetime deals from ELEGOO. This happens when the printing bed continues to maintain the high temperatures that cause the base to slowly extend outwards. Check the USB extension line. When there is a suction pressure, it can cause a vacuum in between layers thereby resulting in nonalignment of print layers. The resin may not solidify if the temperature falls too low so you want to ensure your resin is at room temperature for it to work fine. 5. If you run into any problems with the firmware please contact our support team at 3dp@elegoo.com, we will try our best to help.3. Check the slicer settings and key in the right values to change how the material is being deposited over the printing table. If youre using ChiTuBox, go into the advanced settings, check the Anti-Aliasing box, and then select a level. Then, reinsert the USB flash drive, Turn the printer back on. It should automatically load the files. If there are dead spots in the screen, you can find them by doing an exposure test. 3D Printerly is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. How to perform regular maintenance on the Z axis, USB DRIVE FILES (MANUAL & SLICING SOFTWARE INCLUDED)-link 1 or link 2 - Google Drive. Increase the distance between the bed and the nozzle to get rid of blurry lines and blobs, and the process will now be smooth. 3 Large-Capacity Design: With a 7000ml large capacity, you can directly wash models printed on ELEGOO Mars 2 & Mars 3 series and Saturn/Saturn S (with build plate), or batch clean parts removed from the build plate to improve your post-processing efficiency. ELEGOO 2 PCS Metal Resin Tank for ELEGOO Mars 3D Printer with FEP Pre-Installed and 2 Lids and 2 Allen Wrench, Resin Vat for ELEGOO Mars, Mars pro, Mars 2, Mars 2 pro, Photon and Epax X1 1,603 200+ viewed in past week $3099 - $3999 FREE delivery Compatible with Chitubox Pro andChitubox1.9.0, FirmwareV4.4.3-F9.23-link 1 or link 2 - Google DriveFirmware V4.3.13-F2.23-link 1 or link 2 - Google DriveFirmware V4.3.13-F2.19-link 1 or link 2 - Google Drive, Click to Download: English Version-link 1 or link 2 - Google Drive, Click to Download: Japanese Version-link 1 or link 2 - Google Drive, 3. If the printing fails, please do not start your next print immediately. Analysis of Common Failure Model Case in LCD 3D Printing, The Best 3D Printer is the one that Suits you, Frequently Asked Questions for Neptune 3 PRO&PLUS&MAX. First use our plasticscraper tool (as shown in the picture) to gently clean the impurities in the tank in time, otherwise it will cause further damages to your printer. Decrease the weight of the resin model by either scaling the model down or hollowing the print. Offcial suggestionsfor ELEGOO resin on ELEGOO Printers: 1. ELEGOO Printers Resin Setting Sheet 2. ELEGOO Cura for MAC: Click to download-link 1 or link 2 - Google Drive, 2. Please do not update repeatedly to avoid being prompted "Same Firmware already exists! However, because the issue can stem from multiple issues, youll have to troubleshoot in order to get a fix. Once you choose a cheap one, then be ready to deal with constant snapping every time a little pressure is applied to them. Chinese V1.1 : Neptune 3Max-Click to view-link 1 or link 2 - Google Drive, 3. Please do not update repeatedly to avoid being prompted "Same Firmware already exists! In addition, if your model is too large, it could cause too much suction, meaning it doesnt stick to the base plate. Login to your Google account. Horizontal lines on your print are often confused for layer separation but they are not the same. But, that also means its likely your first 3D printer. NEP3-All axises debugging: Click to view, 2. Use the right raw material for your process. This happens when the print is dislodged from the bed while the process is still ongoing, leading to the layering going off the course, causing deformities. *Caution: Pleasemake sure whether this firmware matches your printer, wrong update across different printers may turn it unusable. If the extruder already has filament but still doesnt work, then try getting rid of that batch and replacing it with a new one. Need help Printing Elegoo Mars 3 Pro. However, it could also be because of the screen itself. This is an issue that leads to the model being printed appearing unfinished and messy due to the incomplete filling. If it doesnt fall off the build plate, it can still lead to failures due to the model moving around and not having stability. For a 4K LCD printer like the Anycubic Photon Mono X, a bottom layer exposure of 30 seconds usually works well. The moment the cooling process becomes too fast, the warping sets in. Theres a possibility that the printing bed has not been adjusted well before the process kicks off. If you run into any problems with the firmware please contact our support team at3dp@elegoo.com with the batch number labeled at the bottom of the printer, we will try our best to help. Japanese Version: Neptune 3-Click to view-link 1 or link 2 - Google Drive, Assembly Tutorial Videos: Neptune 3- Click to view, 1. On the bottom left of the screen, turn on the beeper. You want to make sure that your prints are well hollowed with the print walls at 2mm or so (depending on the model) to potentially improve your prints, success rates and to save resin. I got a new Elegoo Mars 3 almost 6 months ago and I had been using it flawlessly, even after I added a magnetic flex plate. Reference video and change fep:Mars/Mars C/Mars Pro/Mars 2/Mars 2 Pro:Saturn: Subscribe to getthe latest special offers, free giveaways, and once-in-a-lifetime deals from ELEGOO. Once it cools down, that part becomes permanently deformed. https://www.pinterest.com/pin/106186503703832092/. Before you begin re-leveling your build plate, make sure it is fully clean of resin or any residue. Can You Recycle Failed 3D Prints? (3 Safety Factors Analyzed). Without checking, you may take too long to finally decipher the problem. To help us serve you better and faster, please contact us accordingly via below emails: For order and customer support inquiries: info@elegoo.com, For 3D printer technical support:3dp@elegoo.com(While you wait, you can check the troubleshooting documents here)For STEM kits, please contactservice@elegoo.com(North America); or euservice@elegoo.com(Europe, UK, Asia & Australia). April Giveaway Week - Winner List. Here, its always a good idea to check your slicer to see if the base actually connects with the base plate. There are a few reasons this could happen though. Then, check the Home settings on your Z-axis. 3. A modified version of PET material used in packaging, PETG is generally considered a safe thermoplastic. After printing bout 2kg of resin, the display started showing signs of dead pixels. 4/16/2022 Update log: Fixthepotentialhiddenproblemofexcesscuredresinduetoabnormalscreenbackgroundlightexposureduringprinting. You have to rescue the temperature of the printing plate to give the first layer enough time to cool and solidify into place. Original Washing Bucket used on ELEGOO Mercury Plus 2 in 1 Washing and Curing Machine Perfect spare parts for ELEGOO Mercury Plus 2 in 1 Washing and Curing Machine Product Size: 185x150x206mm . UI Update File. In general, around 50mm/s is a good rule of thumb for bottom lift speed. Caution: Do not use any sharp tools in this operation. Solution: Start by increasing the temperature in the extruder by about 10 degrees celsius. the troubles that may come up, how you can solve them, among other important pieces of information that will help you get the best out of your printer. I had NEVER actually tapped on the "set z=0" option, but . Wolverine. The USB drive must be formatted in FAT32 and should be smaller than 4GB. Instead of downloading the Exposure test file, youll want to go to Tool and then Tank Clean and then run the full-screen exposure. 1_EL03LCDE1-76804320-F32. But there are some, especially those that are mechanical, that can only be fixed by an expert. To deal with this, there are some solutions that you can try to make sure the next batch doesnt suffer the same fate. While witnessing have been phenomenal since they made their entry into the manufacturing space. Id recommend taking a look at your bottom layer settings and making sure they are adequate. But some dont have this feature. Make sure you use the SL1S in a well-ventilated room to minimize the danger from inhaling fumes. ChiTuBox Configuration File (ChiTuBox 1.4.0) ChiTuBox Configuration File (ChiTuBox 1.5.0) Adapter Plate STL. If you have any business inquires please fill in the form below, we should get back to you soon, 3-7 workdays for delivery (7-14 workdays under the impact of the COVID-19 pandemic or during promotion/holidayseasons. Ensure that the plate is properly leveled by sticking to the instructions in the manual. Chitubox and Elegoo Mars printing problem, Exposure Test Fails, Saturn S, full screen with black line down center, Build plate's spring gets stuck after thighening the screws. This is called the infill, and in some cases, it can be visible from the outside, giving the final product a very weak and bad appearance. If you are unable to download the file directly from the links above, please try the following: 1. Compatible with Chitubox Pro andChitubox1.9.0, FirmwareV4.4.3-F9.23-link 1 or link 2 - Google Drive, Firmware V4.3.13-F2.23-link 1 or link 2 - Google Drive, FirmwareV4.3.13-F2.19-link 1 or link 2 - Google Drive. Then, put everything back together, close your Elegoo Mars and try booting it back up. Updating the firmware is a relatively simple process. This could be due to a glitch in the software or a misalignment of the nozzle. This is a very common phenomenon in certain types of Bowden printers. This issue is best known as ghosting in the 3D printing circles, and it is caused by the infill getting too close to the perimeter of the model and eventually running the walls too thin. At the same time, reduce the hot-end temperature by tinkering with the hot-end settings or making direct changes through your software, depending on how advanced it is. Starting with an issue working your way down is always a good idea. It is hard to notice them during the process, and this is why people get surprised once the cooling has happened and they suddenly notice them. If there are dead spots, youll have to replace the screen. Thanks to Siraya Tech for sponsoring this video! You have to offset the Z-Axis by raising the nozzle a little bit. Horizontal lines showing up on your print is a common issue that can be troublesome when printing with your Elegoo Mars resin 3D printer. Using PrusaSlicer instead of ChiTuBox can be a good fix to prevent failed prints with the Elegoo Mars resin 3D printer. Firmware V4.5.1_2.3_ELO1_LCDE1/5448x3064/F33.22-link 1 or link 2 - Google Drive. How to replace the power switch PCB board. When the print is not firmly attached to the build plate, it may lead to the print falling back into the resin vat, especially if they are large and heavy prints. Just a little experiment I carried out after getting weird vertical lines from the led lens on my mars pro. This will eventually lead to a deformed product as the alignment will be off all through from the start. Many of these are fixable if you have the right methods, so I decided to look into some ways to fix various Elegoo Mars troubleshooting solutions. This site also participates in other affiliate programs and is compensated for referring traffic and business to these companies. NEP3-X-axis cantilever debugging: Click to view, NEPTUNE 3 CstarVF07C01M CE-MD test report, NEPTUNE 3 CstarWF07C01E CE-EMC test report, NEPTUNE 3 CstarWF07C01L CE-LVD test report, Or downloadCEcertificationfromGoogleDrive, 1.Neptune3ProFirmwareUpdateInstructions-link 1 or link 2 - Google Drive(*mustread*), 1. For this to happen efficiently, the distance between the nozzle and the printing bed has to be spacious enough to allow the nozzle to make free movements. If you have a Mars Pro or Mars 2, you can use the firmware as this feature is built in. It is very common in new printers that have not been calibrated yet. Unfortunately, we cannot change the shipment once the product is shipped. Take off all four top screws from the back cover. Double check settings and compare to those recommended for the material youre using. ELEGOO Mars 2 Mono LCD Resin 3D Printer Technical Specifications: System: EL3D-3.0.2 Slicer Software: ChituBox Technology: UV Photocuring Layer Thickness: 0.01-0.2mm Printing Speed: 30-50mm/h Z Axis Accuracy: 0.00125mm XY Resolution: 0.05mm (1620*2560) Build Volume: 5.08in (L)*3.15in (W)*5.90in (H) 129mm (L)*80mm (W)*150mm (H) Heat the platform in advance and apply some glue if all the solutions mentioned above fail. This will stop the rapid cooling. It contains instructions that are more thorough than Elegoo's. Posts regarding firmware will be directed to that link and removed to control repetitive clutter on user feeds, unless your request is well-documented with images/links to images to show that your firmware updating issue is unique. Click "Save Shortcut to Drive" in the upper right corner of the file download page, and then click "My Drive". There are a couple of reasons why your USB might not be working. If you purchase directly from our website, we will ship the products from our local warehouses in the US and EU via our cooperated carriers.If you purchase from Amazon by click the "Buy on Amazon" button on the product pages,Amazon will choose the carrier for the delivery. Thread / Author: Replies: Views: Rating: Last Post : Clean Tank like Print Error? Just print this in resin or on FDM and unscrew the current interceptor on the build head and put this between the arm and the build head and . How to replace the motherboard for the curing machine, 3. If the cure time is too long or too short, it could cause sticking issues. Adding multiple drain holes to your hollowed print helps air to pass through, resin to leak out, and pressure to reduce further. There are some printers that come with fixed beds. It should be FAT32, MBR, and not larger than 4GB. Elephant's Foot is a unique problem that is characterized by an extended section of the printed model at the base that looks like a foot. This includes quick fixes for errors, failure to read cards, print failure, and more. User's Guide: Click to view-link 1 or link 2 - Google Drive, English Version: Neptune X- Click to view-link 1 or link 2 - Google Drive, Japanese Version: Neptune X-Click to view-link 1 or link 2 - Google Drive, Assembly Tutorial Videos: Neptune X: Click to view, Neptune X CE Certification-link 1 or link 2 - Google Drive, 1. Place paper on lcd. Jupiter/Mars 3/Saturn/Saturn 8K/Saturn S/Mercury Plus V2.0 are currently not available in Norway. If the screen is black, this is likely the issue. It is recommended that the resin temperature should be about 70F (21C) and not too much lower than that to prevent failed prints. Apr 4 [ #ELEGOOPhecda] [Smoke filtering exhaust] The ELEGOO Phecda machine (10W Laser output power-$239.99, 20W-$399.99) comes with a smoke filtering exhaust to help eliminate dust and smoke generated that might otherwise make work with a laser engraving machine challenging. ", English \ Deutsch \ Espanol \ Italiano \ , 3. How to replace the constant current board, 7. Neptune 2&2D&2S Firmware Update Notes-link 1 or link 2 - Google Drive (*must read*), 3. Extension- Mesh Bed Leveling-link 1 or link 2 - Google Drive, 1. But despite the great strides that they have made, there are still a few hiccups along the way that people have to contend with from time to time. There are many times where you will lose a print because it didnt stick to the printing bed firmly. ", Mac OS System: Click to download-link 1 or link 2-Google Drive, Windows64-bit System: Click to download-link 1 or link 2-Google Drive, Slicing Software Activation Guide: Click to download-link 1 or link 2-Google Drive, 1. Keep in mind that if the Z-axis is pushing into the LCD plate, its always too low. Reduce your Z-lift speed so the cured resin has a better chance of peeling off the FEP and onto the build plate. that will not make it hard for the layers to stick to the bed. While modeling in your chosen slicer, check that all the ends of the support are well-connected to the print, so the print does not get weak and fall back in the vat. What follows next is a succession of layers that not only align to the first one but creates an intricate network of filament connections that add some structure to the model from the inside. In 3D printing, there are several layers that are laid down from the very first foundation. If you are not careful, this could send you into a frantic search for the problem and you may end up making things worse. You should also clean out your nozzle to unclog any material that may have blocked it.

Catholic Charities Of The Archdiocese Of Galveston Houston, Dr John Mcdougall Covid Vaccine, Pizza Recipe In Spanish Language, Advantages And Disadvantages Of Functions In Python, Articles E