Geeetech A20M Review – A Dual Extruder, Color Mixing 3D Printer

Geeetech A20M 3D Printer Samples

Hey Karl here with a 3D printer review. I know it has been a while for a printer review and grateful for Gearbest sending the review unit. They shipped me the Geeetech A20M a single nozzle, mixing, dual extruder 3D printer. Man that was a mouth full. It is a follow up to the A10M which is similar but a smaller build volume. The A20M clocks in with a 255x255x255mm build volume. My last foray with a multi material printer was a Tevo Tarantula and it was mildly successful. I didn’t realize that this was a mixing extruder and the implications. I have done some very cool looking prints due to the fact that it’s a mixing extruder. QC Issues I always come to expect some QC issues with these low cost printers. But I have to say that this printer has had the most. Let me list with fixes Z stepper motor bent…..replace z stepper motor Fan for part …

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Alfawise U30 3D Printer now Offered for $166 (Promo)

This time of the year is normally a good period to buy 3D printers at a discounted prices ,as we’ve seen in the past with the popular Anet A8 model, which again is sold for $139.99 plus shipping right now, or if you are based in Europe as low as $129.99 with coupon GB23CC4. Another potentially interesting deal is the new Alfawise U30 3D printer which can be bought on GearBest for $165.99 plus shipping ($7.57 here) with coupon GBBFEX017. The 3D printer is also said to offer safety features, support for left handed people, and resume after power failure or running out of filament. Alfawise U30 main features: 2.8″ full color touchscreen placed on the left or right of the printer frame Storage – micro SD card slot, USB port Build volume – 220 x 220 x 250mm Nozzle diameter – standard 0.4mm nozzle Print speed – Up to 120 mm/s, 30 – 70mm/s recommended Layer thickness – 0.1 …

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Creality Ender 3 3D Printer Sells for $169.99 (Promo)

Creality Ender 3 3D Printer

From time to time I come across good deals for 3D printers, and a recent promotion for Creality Ender 3 3D printer appears to be one of them. Creality Ender 3 has gotten some pretty good reviews – see video embedded below – in the sub $200 market, and GearBest is now offering the 3D printer for $169.99 including shipping from their Los Angeles warehouse. That deal is only available to the US however, and if you purchase it from the China warehouse (CN-099) price is $179.99 + shipping. That’s still a pretty good price though, as the official Aliexpress store offers the printer for $208 with Fedex shipping. Creality Ender 3 specifications: Modeling Technology – FDM (Fused Deposition Modeling) Printing Speed – 180mm/s Filament – 1.75mm PLA, TPU, ABS Layer Thickness – 0.1-0.4mm Nozzle Diameter – 0.4mm Printing Accuracy – ±0.1mm Working Mode – Online or SD offline Nozzle Temperature – 255℃ Hot bed  Temperature – 110℃ Printing Size …

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YouTube Streams 1 & 2 Update, Plus Quick Fix for Uneven X Gantry


Hey Karl here with an update on the YouTube Live streams from last week. Live Streams Update The 1st stream went about as well as I expected….Not very well. I was really nervous and I broke the live link that was posted on here at the last minute. My whole reasoning for the Livestream was to show the processes in real time and not do too much footwork ahead of time. On the first one I was planning on migrating from Marlin 1.1.6 to Marlin 1.1.8 but I had already done lol… So I ended up migrating to the bugfix branch which presented additional challenges. Overall it was successful and I hope I conveyed the process. I was able to get it to print but I ended up going back to 1.1.8 due to some error in the bugfix branch that caused weird jittery movement. I will in the future prepare more. 😀 Second was better but not without glitches. …

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Easythreed NANO Mini Fully Assembled 3D Printer Sells for $160

If you plan on getting started with 3D printing, you’ll already find some decent low cost 3D printers on the market such as Anet A8 that is now selling for around $150 plus shipping. However, most of those come in kits that you need to assemble yourself, and some people may feel uneasy about the process. But this morning, I’ve come across another option with Easythreed NANO Mini 3D printer that is fully assembly, and up for pre-order on Banggood for $159.99 including free shipping.. Easythreed NANO Mini 3D printer specifications: Print Technology – FDM Print Size – 90 x 110 x 110 mm Nozzle Diameter – 0.4mm Layer Thickness –  0.1-0.3mm Filament Support – PLA Filament Size – 1.75mm Rotary technology – Belt drive, linear bearing technology Print accuracy – 0.1-0.3mm Feed Technology – Proximal feed Nozzle Temperature –  180-230℃ Printing speed – 10-20MM/S File format – Input: .Stl, Transfer: .gcode One key printing technology Storage – micro USB card USB – 1x USB port Power supply – Input: 110~240V 50/60HZ Output: 12V, 60W Dimensions – 188 x 188 x 198mm Weight – 3D printer: 1kg, full …

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LiveStream #1 – Migrating to Marlin Firmware

Karl here. I’ve decided to start doing a weekly Livestream on different topics related to subjects covered on CNX Software. For the fist livestream, I will be showing the workflow that I use to migrate to newer Marlin firmware on HE3D K280 3D printer but it applies to any printer. I will also cover the calibration process for the K280. I originally did a written review of the K280 but it is sometimes hard to show concepts in writing. The livestream will take place on  June 14th @ 21:30 ET timezone, and if you are interested you can register below, or come back to this page to check it out. Support CNX Software – Donate via PayPal or become a Patron on Patreon

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How-to Make Your Own 3D Printing Goo

Karl here…just want to do a little post about bed adhesion and what I have been doing for the past month. What spurred this is I saw a ton of videos on Magigoo a while back. It is a product that you wipe on your glass/mirror bed and 3D prints stick very well to it and once the bed cools the part pops off very easily. It is quite expensive and it got me to think about alternatives. I have used glue stick almost exclusively while printing on glass/mirror but a lot of time the prints stick too well and prints can get marred up removing with a tool. It is quite easy to make. 1 cup water and 1 large 22g Elmers glue stick. I put both in water and let sit thinking it would dissolve on its own. After several hours I got impatient and put it in the microwave and heated it.(45 seconds I think). That did …

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Working on High Quality Low Cost DIY 3D Scanning using Structured Light

Hello all, Karl here. I just wanted to send a note about what I have been working on. As the title says shows it is about 3d scanning. I have found it pretty fascinating so far. These are mainly based on structured light 3d scanning. From Wikipedia: Structured light is the process of projecting a known pattern (often grids or horizontal bars) on to a scene. The way that these deform when striking surfaces allows vision systems to calculate the depth and surface information of the objects in the scene, as used in structured light 3D scanners. There are a few commercial offerings that I have run across or have found while searching around but they are very expensive. The first one I ran across was made by Einscan. They are over 1k and have been reviewed a lot. It seems like they put out a good product and keep evolving the software and hardware. A few other offerings are …

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