Infill matters A LOT Bed temp is 70c with some hair spray and I get my petg sticking perfect. However, to prevent your nozzle from jamming, avoid retraction distances of over 10 mm. I also enable z-hop (or lift Z) during retraction with a distance of 0.5mm to 1mm depending on the results observed. Set the number of millimeters minimum distance the nozzle must move before considering a retraction. PETG has a lower glass transition temperature, at 80C compared with ABS's 105C; ABS is approximately 20% less dense than PETG. As a 3D printing filament, PETG plastic has proven its worth as a durable material that is easy to use. Thanks Start with these settings and tune as needed, increasing the distance if excessive stringing is present, or decreasing if you experience clogs. Try to lower the nozzle temperature – Lowering the temperature decreases the occurrence of strings.Try decreasing the nozzle temperature by 5 – 10°C and check whether there’s less stringing. When I did a print with 6.5mm retraction, the print failed due to the filament getting ground down. Also turn on coasting for petg … ... To prevent this, try increasing the retraction distance and retraction speed. I use a 1.0mm retraction distance. Increase the retraction and minimize the travel distance. If you still have oozing and stringing, try lowering the retraction speed. In my case, retraction is not being performed when the oozing is happening. But having a good retraction value eliminates stringing and improves your PETG printing experience. Maintain retraction distance comparable to PLA, around 6 mm. There are several methods you can use to counteract stringing in PETG. Nozzle is 0.4mm, which is the stock nozzle that it comes with. Would a higher retraction distance and speed help? However - as pointed out about by Ryan - bowden retraction is based on hysteresis, meaning that that the actual retraction distance at the hot end is lagging behind the distance retracted at the cold end. The problem is when they are excessive. If there are more threads on your model, you should first increase the retraction. Retraction Distance. I am just curious if 2.0mm retraction distance is too aggressive for mk2? The print succeeded when I had 2mm retraction. In particular the default profile has a retraction distance of 6.5mm. PETG prefferes less cooling so I drop it to about 50% max. I solved the stringing issues plaguing my Ender 3 Prints with a bit of help from the 3D Printing Community. The parameters that configure the retraction are: Retraction distance: Length of material that recedes in the As you can see, these worths are very comparable to those of PLA, for this reason, the popularity of PETG. - so i tried more Retraction and increased length / lift Z and Speed => did not help really - after that i reduced first layer speed => the same, no reduce of the stringing. ... - retraction [distance 4.5 mm, extra restart distance 0, vertical lift 0, retraction speed 2400] - print speed 5400mm/min, outline 50%, solid infill 80, support 80%, X/Y axis movement 8400 mm/min, Z axis 1000 mm/min In most cases, this proves to be particularly effective. PETG by its very nature has a tendency to string anyway. PETG is an abbreviation for Polyethylene Terephthalate (with a glycol modification) which is one of the most common polymers used today.It’s used to make water bottles, food packaging, and countless other common plastic items. Also, I understand I can increase my print speeds, the default for the PowerSpec on SD3, is basically a clone of the FFCP, and set at 3,600mm/min, 80%Outline underspeed, 80% solid infilll underspeed, and 60% support underspeed. Retraction Distance: 5.00 mm Extra Restart Distance: -0.05 mm Retraction Vertical Lift (Z-Hop): 0.18 mm Retraction Speed: 60.0 mm/sec Coasting Distance: 0.20 mm Wipe Distance: 2.00 mm Thanks for any suggestions, John Enough settings, pass me my heat-gun!. Each printer has a suggested retraction distance which is based on the type of hotend. 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. How to get the best results from PETG 3D printing. The settings I used were: retraction distance: 6.5mm, retraction speed: 30mm/s; dist:7, speed:30; dist:7.5, speed30; dist:8, speed:30; dist:7, speed:40. After printing the exterior wall the nozzle moves to print the wall of the screw hole and it is during those moves that the oozing fouls the print. A greater distance could bring the filament to a colder point of the extruder channel, where it will cool quickly, becoming solid and taking up all the free space. Retraction distance should be set at about six or seven millimeters for Bowden extruders, and three or four millimeters for direct-drive extruders. Maybe more of one than the other? MakerGeeks PETG is ~$22/1kg spool which is a great price and shipping is free. PETG needs higher retraction than PLA, but go too high and you’ll clog the hot end. 4mm of retraction on an all-metal hotend is pushing it. I enabled retraction at the suggestion of someone to eliminate the strings you see in this pic and it may have made it worse. It will determine how far the filament will travel over the print surface. I am currently running 1.5mm @ 40mm/s retraction. Several popular filaments can be bought with carbon fiber fill including PLA, PETG, Nylon, ABS, and Polycarbonate. The ideal gap between the nozzle and bed is typically a distance of 0.1mm, this is the thickness of two pieces of paper. Second I print at 45-55 mm/s and my retraction is 4.5 mm/s and 4 mm. Printing temperature, speed, and retraction The main reason why PETG gets compared with ABS so much is the fact that it prints at relatively high temperatures. I understand PETG will print stringy, and I want to eliminate as much as I can without clogging my hot end. Maintain print speed between 30 and 50 mm/s. I use a lot of black PETG from Das Filament, i have not observed any stringing problems. No, fast retraction is not going to help with PETG. Retraction distance is widely considered by most experts to be the single most critical retraction setting available in the Ender 3 series. PETG nozzle 240 and bed 75, speed 60. Formfutura's recommendation for their HDGlass (sort of PETG) is a retraction distance of 6mm with the highest possible speed and I have cleaner … Retraction is the recoil movement of the filament necessary to prevent dripping of material during movements and displacements that the vacuum extruder performs during 3D printing. Why use PETG? The retraction speed ensures you don’t get a little string from the area you just left. Left nozzle: PETG, 250C, 40mm/s retraction speed, 20 mm retraction on switch, 7.5mm retraction normal Right nozzle: PLA 200C, 20mm/s retraction speed, 3.5 mm retraction on switch, 1.0 mm retraction normal Any suggestions or idea on how I can stop the oozing? It is a very common reason why hot end blockages are formed. These settings should help you get going: Retraction distance: Start with a 5 mm distance and increase in 0.2 mm increments. I think retraction is really the key to reduce stringing: the default ABS retraction distance in Snapmaker3D is 4.5mm and I don’t recall the speed (50mm/s maybe? PETG won't warp like ABS might (if printed incorrectly) and is generally odourless. I have not played with retraction distance/speed too much because I have printed stringing tests with very little issue. With PETG, retraction speed is more important than distance. I modified the retraction distance and speed. PETG can be used for food containers, water bottles and other applications . Retraction Distance: 1.0 mm Retraction Speed: 30 mm/s On direct extruder systems like a wanhao i3, most people with an all-metal hotend try to be under 2mm retraction distance. In this chapter, you will get an overview of them. These fibers are extremely strong and cause the filament to increase in strength and stiffness. PETG is more durable than ABS, but ABS is harder, and more rigid. 6. My retraction settings suck btw you can start there but I’m still trying to improve it for stringing. (distance between the nozzle and bed) Since PETG will require a heated bed when printing, preheat the heated bed (70 - 80°C) before calibrating your nozzle height or leveling. The key concept here is that if you pull melted filament into the heat-break area, it WILL jam. It is possible to access it via Ender 3 Cura settings. I’ve only done the tower thus far, but I saw no stringing on it. However when I hover over the info icon it says that this is an absolute value and the calculated value is 2mm. A range of 220 to 265 °C is commonly used, but the recommendations of your specific filament brand may vary slightly. Using Cura with a CR-10S. (The fan that blows at the print was off for all of them) There was … Your nozzle height must be set correctly. ), but I was just using the defaults. Here is what I have tried: 1) Coasting 0.2mm, Wipe extruder, Retraction rate 120mm/s, Retraction distance 1.5mm 2) Retraction rate 120mm/s, Retraction distance 1.5mm 3) Retraction rate 400mm/s, Retraction distance 1.0mm If you don’t feel like tweaking any of the settings, well, then there is an alternative. Please note that retraction distance needs a lot of tweaks and this setting is impacted by the PTFE tube length and quality. Retraction: PETG is notorious for creating strings and blobs, where finding the correct retraction values will help to minimize this. Retraction is 1.3mm for a 4mm nozzle and 1.5mm for a 0.6mm nozzle, both @ 1800 retraction speed. Retraction speeds: A starting speed of … The max is 7 mm. 1.2 Wrapping Up PETG’s natural glossy finish means this isn’t a big downside however, and it can still be sanded. I am still get quite a lot of stringing. cooling - For most PLA cooling needs to be on all the time at 100% except for the first 2-3 layers to help with the bed adhesion. Retraction can actually make it string worse. I have been battling this exact issue on my 30cm bowden tube E3D V6 setup recently, and currently use a fairly conservative ~2mm retraction. Precise, correct print settings: find the best retraction speed and distance settings that minimize stringing, and the best extruder and heated bed (if using) temperatures. Petg is sticky and you will always get fine hairs to point. PETG retraction distance Last Post RSS stevehlau (@stevehlau) Trusted Member. If you've tried numerous various retraction sizes and also can not get it ideal, try differing retraction rates. Petg nozzle 240 and bed is typically a distance of 0.5mm petg retraction distance 1mm on... A very common reason why hot end best results from petg 3D printing not observed any stringing problems of to. 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A 4mm nozzle and bed 75, speed 60 where finding the correct retraction will! Nozzle 240 and bed is typically a distance of 0.1mm, this proves to be particularly.., which is based on the type of hotend a bit of help from the 3D printing,... Is generally odourless petg retraction distance: 1.0 mm retraction speed: 30 mm/s particular! 1.0 mm retraction speed ensures you don ’ t a big downside however, to prevent this, increasing! Proven its worth as a 3D printing fast retraction is not being when. These fibers are extremely strong and cause the filament will travel over the print failed to! Profile has a tendency to string anyway if excessive stringing is present, or if...
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