Merry Christmas! Many have requested a guide to changing the Melzi mainboard to an MKS Gen L. I've put in the work to make this as simple as possible for viewers to follow.
The Makerbase MKS Gen L is cheap, yet offers a significant upgrade over the factory mainboard. Future mods will be a lot easier in terms on IO and firmware changes.
EDIT: I probably should have mentioned this has no effect on print quality.
My 3D printed housing/adaptor moves access to the mainboard underneath the printer. This is not ideal but was necessary to allow access to the USB port. At least this is easy with the hinged design. The mainboard cooling fan is now at the front, creating more room for different stepper motor drivers with taller heat sinks.
The method of upgrade shown here is the cheapest way possible. It reuses the factory LCD screen, but loses the SD card slot. If you want to retain this, explore the options on the links below. A video on upgrading to better stepper motor drivers in upcoming..
MKS Gen L pinout: http://www.robotrebels.org/gallery/16_08_07_17_7_42_19.jpeg
MKS Gen L connectors diagram: http://www.robotrebels.org/gallery/16_08_07_17_6_14_14.jpeg
My Creality Melzi wiring checklist: https://imgur.com/a/Zy7rdq4
My MKS Gen L Ender 3 wiring checklist: https://imgur.com/a/sRPggoY
More info on the MKS Gen L and touch screens: http://www.robotrebels.org/index.php?topic=769
My new case and MKS Gen L mount on Thingiverse: https://www.thingiverse.com/thing:3311643
Bare MKS Gen L
MKS Gen L with A4988 stepper motor drivers
MKS Gen L with A4988 stepper drivers and touch LCD:
LCD with SD card:
Purchase the Ender 3 from these links:
Ender 3 Pro Banggood ($30 off with coupon 1d1c08): http://bit.ly/2OUcEyS
Ender 3 Banggood (US warehouse, Coupon: f2bf59): http://bit.ly/2Efoi6B
Ender 3 Pro Amazon: https://amzn.to/2DpkbEs
Ender 3 Amazon: https://amzn.to/2xyJ23s
Ender 3X (glass bed version): https://amzn.to/2I7dG85
Buy quality and affordable filament from X3D. Buy 3, get 1 free and a free sample pack with every order: www.x3d.com.au
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#ender3 #upgrade #mksgenl