![]() (GCode Example : “G1 X5? or “G1 X0? or “G1 Y5?) The stepper motor should move if everything is working. Send a g-Code to the Axis you are testing.If not connected the right way you can cause damage to the shield, stepper motor drivers and Arduino board. Connect the external power to the shield, making sure you connect the power up the right way.Next, install the stepper motor driver ensuring that the enable pin on the driver aligns with the enable pin on the shield.Without a stepper motor connected there will be nothing to consume the current and you can end up damaging the stepper driver if it over-heats in the process. This is very important because the Pololu Stepper drivers are designed to ramp up the current till it reaches the needed current to run. ![]() Connect a stepper motor to the stepper controller socket you want to test.Make sure the external high voltage power is not power-up or connected.Testing each stepper controller socket individually is critical.Pololu stepper drivers need adjustment and it’s good to have a read through their online manuals at.Open up a serial connection to the Arduino board and check if GRBL is running.(I use Putty to connect to GRBL).Plug the shield into an Arduino board with a pre-installed copy of the GRBL Firmware.Do a visual check of all soldered points on the new board.Last but not least is to install the screw terminals for the power.I use the same principle as with the Arduino Board to align the Stepper Driver headers. Last bits are to Solder the Stepper driver headers in place.This ensures that the headers are always aligned and straight. I usually do it by inserting the headers into an Arduino board and then by placing the shield on top of them before I soldering them in place. Before soldering the stepper driver headers in place it might be easier to solder the Arduino headers in place.Capacitors are usually marked with a ” – ” indicating the ground/negative lead. Then solder them in place making sure that positive lead is on the side with the ” + “.To mount the capacitors horizontally start by bending the capacitor leads 90 degrees.This also leaves a bigger gap between the capacitors and the stepper drivers allowing more ventilation. Because of the height of the capacitors needed, we decided to mount them horizontally utilizing all the space under the stepper drives.By doing this the board will lean-to one side forcing the next pins you are working on to be inserted all the way into the board (Ready to be soldered in place). For me the easiest way is to start with pins on one side and work to the other side. Majority of the assembly work is soldering the provided header pins in place.(Version 3.03 and on does not need the Power Wire anymore.) First step is to solder the Power Wire( or Fuse) and 10K (R1) resistor in place.
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