NOTE: 5V from Arduino nano can't be used beause the laser draws more than 250mA and the Arduino Nano is not capable of delivering that much of current.Ĭonfiguring Micro Stepping for Each Axis. The IRFZ44N N-CHANNEL MOSFET works as an elelctronic switch when receives digital high signal from pin D11 of Arduino. For the constant 5V source from the external power supply LM7805 voltage regulator is used. The laser I've used runs on 5V and has built in constant current circuit. VDD of A4988 are connected to 5V of Arduino. The A4988 Drivers through external power source. The Arduino gets power through the USB Cable. The 'Dir' pin for the X and Y axes is attached to digital pins 5 and 6 respectively. The 'Step' pin for the X and Y axes is attached to digital pins 2,and 3 respectively.

In GRBL the digital and analog Pins of Arduino are reserved. ġx 2.5mm JST XH-Style 2pin male connector.Which is 3 times better the resolution required which is 0.68mm/step.ġx LM7805 Voltage regulator with Heatsink. Now that all the information needed is available, the resolution of the stepper motor could be calculated as shown below: Resolution = (Distance between adjacent threads) / (N Steps/rev) = (4.29mm/rev) / (20 steps/rev) = 0.214 mm/step. The step angle is 18 degrees which corresponds to 20 steps/revolution. Lead = distance between adjacent threads = ( total length / number of threads = 51.56 mm) / 12 = 4.29mm/rev. The threads were counted to be 12 threads within this distance. To determine the lead value which is the distance between two adjacent threads on the screw. The total length of the screw using a micrometer, which turned out to be 51.56 mm. The distance along the screw was measured.

In order to measure the resolution of the CD/DVD drive stepper motor, a digital micrometer was used. Procedure for calculating the resolution of the CD Drive Stepper motor: You'll just have to test your motor to see what it does. Also, not all such motors do 20 steps/rev. The small size and low cost of a DVD motor mean that you can't expect high resolution from the motor. The stepper motors are 4-pin Bipolar Stepper Motor. Using a small Phillips head screw driver I removed all the screws and detached stepper motor, the sliding rails and the follower. Two DVD driver mechanism are required, one for the X-Axis and the second for the Y-axis.

Diy 8000 software