KINGPRINT KFB2.0 Controller Board for Reprap Mendel Prusa I3 Kossel 3D Printer

I purchased this board to upgrade a $160 A8. My son has a Reprap Prusa i3 which I bought for about $100 more. The A8 was a great deal overall, but I like some features of the Reprap better including the rotary encoder on the lcd (I hate the pushbutton one) and the ability to upgrade the stepper drivers. This board looks like the same form factor as the A8 board but matches it only in one dimension, so is not directly mountable as the original. Pros: 1- you can use the DRV8825's on x and y for smoother, quieter operation. 2- One less layer than the RAMPS setup. 3- There is no interference between stepper driver board modules as is generally the case for RAMPS boards. Cons: 1- The ribbon cable connectors are on backwards. Thanks to Skroy for the heads up on that otherwise I would have returned the board. I unsoldered and rotated the connectors. The correct orientation is with the "notch" of the receptacles facing away from the board. IF upgrading an A8 you will need to rework several of the connectors being very careful to wire correctly. Pay particular attention to the endstop wiring and stay away from Vcc. It would have been nice if there were a second receptacle for the second Z axis stepper as on the original A8 board. Instead of splicing the motors in parallel, I mounted another receptacle as shown in the attached picture and soldered bus wire jumpers in parallel. A8 users will also need to invert the logic for Y,Z and E0 in the config.h as well as change the default axis steps per unit for Z if using a lead screw instead of a threaded rod and also change the encoder direction when adding a 2004 LCD with rotary encoder. I'm deducting a star from the review for implying a package of two boards. Two boards would be too good to be true at this price, but a kid might think that's what they are getting based on the description. Another star goes for putting on a Q.C. sticker with the connectors on backward.

I like the board, have it working in Tronxy X5 (original was DOA) with A4988 drivers. It has bit different shape than original Tronxy, find my mounting bracket on thingiverse. On my board LCD connector soldered correctly, works with original LCD and rotary encoder (Reprap Discount) but 5V and 12V fan connectors soldered the wrong way. No biggie, easy enough to resolder but some fans might fail if you power them wrong way so watch out. This is minus one star.With original .X5S LCD you loose SD card, if you need it, need to solder few parts on LCD, order SD card with SPI interface or just get another RepRap Discount LCD. There is no SD card slot on board but does not matter to me, using with Octoprint.EDIT: Looks like you dont need soldering to change fan polarity. Just pull plastic of fan plug and insert it different way. Metal pins will remain in the board. The notch should look inside, not outside.

I like this board. There is little to no documentation on it, as of this writing, so it might be new. It's really all you need for a simple 3D printer and you can't go wrong with this price.I have created an instructable for wiring this board, If Amazon allows: https://www.instructables.com/id/Wiring-the-KFB20-3D-Printer-Controller/It has all the features of a RAMP 1.4, all neatly tucked on one board. You still have to provide your same stepper drivers which seems to make this one step below the MKS Board. It does take 24 volt if so desired which makes this better then the RAMPS 1.4I uploaded the Marlin 1.0.x software and configured it as MOTHERBOARD BOARD_RAMPS_14_EFBAll other configuration are pretty much the same. It would have been nice to have some documentation and all printing of useful information is at the bottom of the board.I've been running it for a few days now and it's been doing fine.

This is my first printer build, i had never messed with firmware or anything like that and i had no experience with marlin configuration, this motherboard was very easy to program and setup. a few pins were bent upon opening but i simply bent them back and all was well. i would recommend this board to anyone who wants to build a printer, upgrade their existing printer or replace a damaged board. The board did not come with any documentation but YouTube and google are your best friend, gives me motivation for my next printer build ill definitely be buying this board again.

The bed heater FET is a little under-powered in this implementation, but they provide the EN, STEP, DIR and GND pins for each channel if you want to control big beefy TB6600 stepper drivers.Excellent deal for the price.

Would have been 5 stars but only gets 4 for lack of documentation. This is no big deal for someone who knows their way around 3D printer controller boards, but could make for a daunting experience if you're a novice.

Worked very well, easy to set up. Works like RAMPS and Mega 2560. The only problem was there was only 1 plug for the Z axis stepper and I needed 2 so I had to solder the wires on my motors together. Worked well enough I bought another

Nice alternative to the leaning tower that is Arduino/RAMPS. Works well with 16X microstep but issues arose with 2 different boards at 32X with fast motion as 8 bit CPU couldn't keep up. At 16X or less and there are no problems. Much better connectors than the non-locking Dupont connectors that appear on RAMPS adapters. As for no "documentation", its RAMPS and pins are silk-screened onto the bottom of the board. I've had the best luck with generic DRV8825 driving name-brand Japanese NEMA 17 just below driver current limit.