Review on 🖨️ Ultimate 3D Printing Experience with Creality Meanwell Motherboard Carborundum Platform by Radney Taala

(Update) May 2021 After some discussion and posting my first review, the seller agreed to send me an updated motherboard. I had to wait a few weeks as it came from China, but when it arrived the problem with changing layers was solved. I also got another fan that didn't fit because it was thicker. I said I need longer screws to use it and the seller offered to hot glue it (for testing). I think I'll probably just stick with the old fan as there has never been a bad circulation issue. My general impression is that once the printer is set up and has fully functional circuitry, it performs fairly well. I don't know what warranty the printer came with, but I didn't have a return policy with Revain, so I'm grateful to have received the parts I needed to repair it. (Original review) I've offset so many layers in all three axes, these prints are unusable. With any print larger than the calibration cube or the little dog pattern that came with the printer, I find that every single layer is shifted. Both the calibration cube and the dog sample come out great. What happens with every tap that lasts more than an hour is that I hear occasional "bumps" of noise that correspond to displacement in all three axes. At first I thought this nozzle was dragging the pressure along. I added a lot of z-hop to eliminate this. I thought it was the belt tension. I made the straps so tight that I even broke one while testing. After replacing the belt and checking that they all have good tension, the problem persisted. I eventually found out that the hitting noises were actually coming from the extruder's stepper motor trying to push too hard and skipping a step. As far as I could tell there was no apparent reason for this and the bobbin was very loose as I was basically pulling the thread through by hand. I checked if my firmware is up to date and I even tried another slicer from Cura. No matter what I did, I kept hearing those bangs and the horrible shifting of shifts. I'm a mechanical engineer and I felt I put the car together pretty well by making sure all the fasteners were tight, the belts were properly tensioned, the pulleys were properly tensioned. works freely with minimal play, and so on. This was only after I found out that other people who bought Ender 3 V2 printers around the same time (late 2020) were having the same issue and were all citing "heat soak". It has something to do with the V4.2.2 motherboard can't handle the heat and send an unstable signal to the stepper motors. did. I then made some changes to help with thermal management which I thought might pinpoint the problem. First, I raised the entire printer about an inch to allow for more airflow from below. Then I opened up the motherboard bay and let the cold air blow directly on it from the nearest open window. When I resumed printing, I noticed that the X and Z axes stopped moving and the knocking was gone. However, the Y-axis was still horribly misaligned. But when I put my hand on the Z-axis stepper, the offset on that axis disappeared and that part of the print came out clean. I've now proven that this is some sort of signal/heat management issue. The reluctance to physically put my hand on the stepper motor caused me to look for other solutions. I sprayed the motherboard with cold air from an aerosol can while it was running and found that this also solved the problem. The tiny fan that came with the printer just can't cool it down fast enough, but blowing more air or installing a larger fan really is a temporary fix. I contacted the seller with these findings. I asked them to send me a new motherboard version V4.2.7. Do you want to know what they said? They will send me a new fan. Many Thanks. Now I have to wait for a new fan to replace my dear fan. I'll update my review when it comes out but things aren't looking good.