3/13/2024 0 Comments Ramps 1.4 arduino mega 2560 pinoutStrip the end of the green wire, and screw that into one of the terminals with a black wire. The RAMPS board has + marked next to the terminals that should be connected to the 12V wires. Strip the ends of 2 yellow (12V), and 2 black (Ground) wires from the ATX, and screw them into the RAMPS terminal plug. I used electrical tape plus heatshrink, but it's better to use heatshrink of the correct size instead.Ĩ:41 Use a heat gun to shrink the heatshrink - don't use the soldering iron like I always do!ĩ:56 Wire the endstop boards to the 3-wire endstop cables.ġ1:15 If your ATX power supply still has its motherboard connector, cut the motherboard connector off the end of the wires.ġ2:40 Unplug the RAMPS terminal plug (with the screw connectors) from the board. I could have cut those wires back a bit before soldering them, to make the wiring neater.ħ:13 Finally, soldering the motor wires to the 4-wire motor cables, and protecting the joints. If you can't find a datasheet for your motors, it is possible to work out which wire is which using a multimeter, but I won't cover that here because I don't want to overload this Instructable with details.ħ:02 How I soldered the wires from the middle of the coils together, protected the joints with heatshrink, and tidied the wiring with cable ties. In this case, you'd ignore the 2 wires that I've coloured orange, which are connected to the middle 2 pins of each pair of coils. The second image shows the most common 6 - wire stepper configuration. The colour codes of the wires coming from your motors will probably be different, but the aim is to connect each pair of coils together as shown in the diagram. I've drawn red lines between the wires I joined together, and the blue lines show the wires that you need to solder to the 4-wire motor cable. The first image shows the diagram of the motor coils and wires from the data sheet. Technically speaking, this means wiring a unipolar stepper motor in a bipolar configuration.ĥ:40 I Googled the motor serial number and found the data sheet. In the video, the motors are already prepared to have 4 connections, but you'll probably have to connect the 8 wires together in the correct order so that the driver chips can control them.Ĥ:46 I talk about how to connect those 8 stepper motor wires together. Wire up the motors to the 4-wire motor cables from the RepRap wiring kitģ:06 Stepper motors often have 8 wires - this is called a unipolar configuration. ATX computer power supply, or any power supply with 12-24V at 15A or more.For the X and Y axes, I'm using motors with a 1.8 degree step angle, and for the Z axis, I'm using a motor with a 0.9 degree step angle. 6 x opto endstop boards - I used ones from the original RepRap, but various other opto endstop boards will work.You can make your own cables, but the wiring kit is cheap and easy. RepRap wiring kit, with 1 metre wires.Taurino board - based on Arduino but can handle higher voltage and current.I set up the electronics with two Y axis motors and 2 Y axis stepper drivers for extra torque. I like the RAMPS electronics that my RepRap runs on, so when I decided to build a CNC router, I wanted to run it on the same technology.
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