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This expansion board as a driver expansion board, can be used for engraving machines, 3D printers.
It is a total of four slots, can drive four A4988 stepper motor.
Each road stepper motors only need two IO ports.
GRBL 0.9 compatible. (Open source firmware that runs on an that turns G-code commands into stepper signals)
PWM Spindle and direction pins
4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13)
2 x End stops for each axis (6 in total)
Coolant enable
Uses removable A4988 or DRV8825 compatible stepper drivers
Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping)
Compact design.
Stepper Motors can be connected with 4 pin molex connectors or soldered in place.
Runs on 12-36V DC. (At the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)
Please note that this is an unassembled kit and Basic soldering skills are needed
Mix with slow current attenuation model.
Internal UVLO and low RDS (on) output.
Automatic current attenuation mode Detection/Select.
Phase-in rectifier, low power consumption.
Warning: Connecting or disconnecting stepping motor while driver is powered on might damage driver.
Packing Included:
1 X V3 Engraver Shield 3D Printer CNC Expansion Board A4988 Driver Board
Nathan Smith
Reviewed in the United States on August 15, 2023
I bought this board to upgrade from my old RAMPS 1.4 and I am severely disappointed in the poor quality. I was even more disappointed that after wiring everything up, it would not even power on the arduino.I will be demanding a full refund.
Anushruth
Reviewed in the United States on March 22, 2023
Spent two days debugging the board. Something was off. Vmot and Vcc weren’t connected(shorted). Open circuit Vmot was 2v on 15v input. Ven was jumping between 5v and 2v. Was able to get an oscilloscope on the last day that confirmed my suspicions. If you really need a Ramps 1.6, I’d recommend getting spares. I’m sticking to 1.4 for now
James Casterline jr
Reviewed in the United States on January 6, 2023
Use a MOSFET if your heaters pull alot of amps. The circuit traces are very thin, and cannot handle much current.
Max
Reviewed in the United States on May 12, 2022
I received one of these boards from this vendor that looked OK not great. It had some minor quality issues like misaligned or bent header pins. It just looked like the headers were soldered by hand, hastily, with some needing a little bit of gentle bending to be able to fit together. That was disappointing but not a deal-breaker, but then one of the screw terminals was broken and I couldn't attach a wire to it, so that one got returned.Once I got the second one, I saw the same quality issues, but also I saw that the heatsink and jumpers were not attached to it, whereas they were with the first board. That really makes me think they took a returned board and tried to pass it off as a brand new one. Then, after spending a while, perhaps an hour, hooking up and testing it, I discovered that it wouldn't heat up the heated bed or hotend at all, no voltage at the 12V outputs for either. I didn't test the fan output but I assume it was also toast.That's the danger with open-source hardware on Amazon: anyone can make it and not everybody tries as hard as they should.
GARY TAYLOR
Reviewed in the United States on February 12, 2022
The first indication their was a problem. Power led didn't flash when connected to USB port.Second was no power when connected to 12volt power supply.I currently have two of these boards from this vendor I'm experiencing the same problem with both.I should have read the reviews first.
james roberts
Reviewed in the United States on October 24, 2021
this Ramps 1.4 board is flawed internally, when the part fan connected to D9 turns on it also triggers D8 the heated bed which should be controlled by the thermistor for D8 but when it sees D8 as off the thermistor ignores the temperature increase which coincidentally went to 185 before I noticed it and turned the printer off. If I had not been present this WOULD HAVE caused a fire. Yes I do have thermal runaway protection enabled but it failed in this situation as it is not written to detect this type of flaw.
Josh
Reviewed in the United States on May 15, 2020
Gone through 2 of these. First wouldn't even power up. The 2nd powered up but the VCC pin would shut shut the board down entirely when a jumper was placed on it to activate the servo controller. I have used another 1.6 board from another company that worked fine but this one is absolutely horrible and full of defects.
Todd C
Reviewed in the United States on March 10, 2020
Well, the board itself seemed to be of good quality. No spatter, good looking solder joints, only couple bent pins from shipping.The deal breaker for me was that I use servo leveling and could not get power to the servo pins. The RAMPS 1.6 is not a reprap community item, having been designed by a BIGTREETECH, and sources not released. It's a good design, but getting information on it is a pain. The pins for the servos were under Extruder 0, with no space between, and that could lead to confusion by new users. Existing diagrams were noticeably lacking this info and took me a while to find even with the good job silk screening all the pins on the board, the VCC to 5v jumpers were also right up against E0 and if you are off even one pin I hate to think how short lived the board life would be. There should at least be a space between those pin sets. Otherwise looked to be a good design but with the above, no power to servo pins, and lack of clear info, I think I'll stick to RAMPS 1.4 until the COMMUNITY releases a new board.
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