After reading reviews and watching YT videos of several BMG type extruders I decided to upgrade my FLSUN QQS Pro delta printer. It's been a fairly painless process and the results so far are excellent. In the following paragraphs I describe what I felt was necessary: After watching a few videos about a known issue with this particular extruder, I first made a simple change to avoid problems in the future. The idler wheel on the pressure release lever has approximately 1mm of play, which allows the grooves in the idler wheel and pinion to move, making threading difficult. I solved this problem by removing the tensioner from the arm (it comes off fairly easily) and installing some 3mm washers on the shaft at the end closest to the front of the extruder. This shifts the gear so that it does not move away from the pinion. Depending on the thickness of washers you have on hand, one may be fine. Then the direction of rotation of the stepper motor had to be changed. There are several possibilities for this. I chose the easiest one if you don't have access to the printer firmware source code. Just swap the wires of one of the coils on the connector. On my printer, the connector that connects to the stepper motor has four wires in this order: Blue Red Green Black. By very carefully disconnecting the blue and red wires from the connector (there are tons of videos on YT describing this) and swapping them, you can change the direction of rotation. Then a new order: red blue green black. Finally, the extruder spacing per mm needs to be changed in firmware to match the new hardware. It worked for me up to 408.8. Consult your printer's documentation to determine what is appropriate for your printer. As such this is a very good extruder which I would give 5 stars were it not for the need for an idler gear seal and the total lack of documentation that came with the box. YT and Revain reviews will help you further!
Befenybay 2020 Upgrade: X-Axis Synchronous Belt Tensioner For Creality Ender-3/Ender3 Pro/Ender3 V2/CR-10/CR-10 V2/CR-10 V3/CR-20 Pro โStraighten And Stretch For Enhanced Performance
50 Review
10Mm X 11Mm Black Plastic Open Type Cable Wire Carrier Drag Chain Towline R18 For 3D Printer And CNC Machines - 1 Meter Length
7 Review
BIGTREETECH SKR 3 EZ Control Board 32Bit New Upgrade Silent Board Support EZ2209/ EZ5160/ EZ2130 Stepper Driver Compatible TFT Series Touch Screen, DIY For Most FDM 3D Printer (With 5PCS EZ2209)
7 Review
Pack Of 5 TMC2208 Stepper Motor Drivers For 3D Printers, DORHEA V1.2 Module With Heat Sink And Screwdriver For RepRap, RAMPS1.4, MKS, Prusa I3, Ender-3 Pro Controller Boards
19 Review
Economic Ender 3D Printer DIY Kit With Resume Printing Function, Large Printable Area Of 220X220X250MM By Creality 3D
18 Review
๐จ๏ธ ANYCUBIC Assembled Innovation Off Line Printing: Streamline Your Printing Process with Cutting-Edge Technology
5 Review
UV Curing Standard Photopolymer Printer by IFUN
5 Review
๐จ๏ธ IFUN 3D Printing Liquid Resin: High-Quality Innovative Solution
5 Review