telescope stepper motor controller

The diagram below illustrates how the parts will be put together. delay(1000); Telescope control with stepper motors. playHighTone(); If you want to take a stab at amateur astrophotography, or have a telescope with “goto” or auto tracking capability, you either need to make a substantial investment in hardware and software, or you can built your own computer controlled mounts and use a variety of open source telescope guidance software packages. } } motor.step(1); //Replace value with -1 if you wish to reverse the rotation of motor The serial protocol is compatible with Moonlite focusers, so their ASCOM drivers and supporting software can be used. Geckodrive G540 4 Axis Bipolar Stepper Motor Controller. { Main features: Interrupt-driven motor control for fast and accurate operation (up to 1000 steps/s) Thank you. When selecting this system be sure to select the controller and the motor you need for your scope. tone(speakerPin, 7040, 20); //High frequency tone feedback if (motorSpeed <= 48){ //Red indicates that the motor is operating at an RPM that is lower than the predefined value I have an extra one that I am considering using as a camera rotator motor. Please take a look at FocusDreamPRO User Guide. Mel Bartels’ Telescopes and Telescope Making else if (command == “RA+” && meridianFlip==true){ //PHD2 sends “RA+” over the serial port } Hi, Eteny. playHighTone(); I have two little girls and I cannot justify spending so much money on a commercial mount, so I will be happy to build a tracker on my own in order to continue my passion with astrophotography. In achieving polar alignment, simply pointing at Polaris is not enough. Once the shield board is ready, take the box and start to lay out all of the … { Removing the cover reveals the circuit board for the stepper driver. Our websites use cookies to improve your experience while you navigate through the Make: ecosystem. Dave Schwartz designed a low cost ESP32 based SHC, and Khalid Baheyeldin ported the SHC code to work on it. When you say you want to build a tracker based on Ioptron or Fornax10, do you mean (1) building something similar (especially, fabricating your own gear system/gearbox mechanism) or (2) using already existing parts from those trackers and simply replace the circuit boards (since any commercially-available tracker is already equipped with rather decent gearbox). In this project, I have used an Arduino Uno R3. spinMotor(); During Christmas, my wonderful wife got me an Ioptron Skytracker and I must say that I am not too impressed with it at all because it is not very accurate (even though is supposed to be using an Arduino system). At the heart of the system is a pair of Maxon Motor precious metal brushed coreless DC motors with 512 cpr encoders and 30:1 reduction gearboxes. Can I add this to my celestron astromaster 130 EQ telescope mount. delay(200); } Here you can see the … The DMC-21x5 is the latest addition to the Econo family and is an easy upgrade path from the long running DMC-21x3 series. { The DC motor option uses a dual port hand controller for $195. 1. { Arduino Mega UNO 2560 or Arduino UNO R3? motor.setSpeed(motorSpeed*2); //Spins motor at a 2X the predefined speed } I know someone (a local enthusiast) who seems to be getting good resullts with an Ioptron :) Are you certain you are properly polar-aligned, or the camera is properly balanced (i.e., the east side is slightly heavy)? pinMode(greenLEDpin, OUTPUT); //Red LED pin Slide {current_page} of {total_pages} - You May Also Like. Now, I have no idea where to begin! } slowDown(); Sorry, your blog cannot share posts by email. These motors are a marvel of technology and can rotate extremely slowly under Arduino control with zero magnetic cogging. Anyway, let me know if you are modifying or building from scratch. (4 wire motor) I tested the circuit on a stepper that draws 200MA per winding and it seems to work properly. } }, void speedUp() }, void checktrackingMode() { Anyone can study the code to know how it works, modify it for their specific needs, and share the source code as they wish. Sir h have not include the input functions in your sketch, And please give the designs for the relay connections and gpusb please. OnStep Telescope Controller STM32 PCB and ESP32 SHC Kits. This sketch implements telescope focuser controller logic for a stepper motor and a Pololu DRV8825 stepper driver board. Enjoy fast, reliable, and accurate telescope focusing with the combination of this Dual Motor Focus Controller from Pegasus Astro and a stepper or DC motor. pinMode(redLEDpin, OUTPUT); //Red LED pin Stepper Motor for GSO LF 2" and 3" Focusers Motorize your GSO LF focuser with our powerful stepper motor. digitalWrite(8, HIGH); playHighTone(); If you ever need to switch back to manual focusing, detaching the stepper motor is and quick and easy. else { You have the option to opt-out of these cookies. Your choice here will be recorded for all the Make: Community Websites. Nema 17 Stepper Motor 42BYGH 1.8 Degree 38MM 1.5A 42 Motor (17HS4401S) x2 Jumpers Joystick module Here is what I would like to accomplish: In short, if I move the joystick to the right, the telescope moves to the right using one stepper. I much appreciate your time and input. All of them have physical buttons for tactile feedback. } } cheers po clear skies! while (digitalRead(buttonApin) == LOW && digitalRead(buttonBpin) == HIGH && meridianFlip == false) { //Checks if red button has been pressed This system was extremely slow, underpowered and unreliable. int speakerPin = 6; //Tones are used as feedback motorSpeed = 48; //Arduino spins the motor at the predefined speed Serial.println(“Meridian Flip OFF: RA signals in normal mode#”); } //Arduino spins the motor at 2X speed It take automatic control of the CCD camera and focuser, and dances around magically on the screen, arriving at perfect focus within about 30s to 3 minutes depending on where you started from. May I know what model of Arduino you using? 99 Serial.println(“OK#”); //Arduino replies with ‘OK#’ playHighTone(); pinMode(stepperPin4, OUTPUT); //Stepper pin //Stepper pin ... 23-08-2019 | Motor Controllers Firmware: Universal Stepper Motor Driver with Built-in USB port, Version 3.07. else if (command == “RA-” && meridianFlip==true){ //PHD2 sends “RA-” over the serial port Focus fast, reliable and accurate your telescope using a stepper or DC motor and our controller. 4.7 out of 5 stars (7) Total Ratings 7, 100% agree - Would recommend. meridianFlip = false; When tracking the sky, the motors turn at 12rpm. Figure 1: DMC-2145 and DMC-2185 Motion Controllers. Dual Motor Focus brings a decade of experience in astrophotography and telescope focusing concepts. Serial.print(“RPM:”); const int buttonApin = 2; //Green push button switch, speed up Thank you for your reply. Although the tracker would be nice since there is no need to rewind it. Serial.println(“OK#”); //Arduino replies with ‘OK#’ A microcontroller-based driver (such as an Arduino) should work with any stepper motor, drive train/gearbox, and most tracker configurations since the tracking rate can be easily specified. The Stepper Driver is a board that holds L293D chip and some optional PC817 optical isolators. Permission is granted for personal and Academic use only. playLowTone(); Pins 1,2,3,4, and 5 can supply + 12 volts for external transistors to power a stepper that will draw more than 500MA. motor.setSpeed(motorSpeed/2); //Spins the motor at 1/2X the predefined speed I would also be adding an auto guiding port to use with a stand alone auto guider since the idea is to build a very portable system. const int stepperPin4 = 12; //Stepper pin Here is a short video demonstrating it, and more info on it, including pictures, as well as links to the STL for a 3… But opting out of some of these cookies may have an effect on your browsing experience. Stepper can be quickly detatched for manual focusing, or switching to our dc motor for nFOCUS control. Once you’ve finished building the DIY Stepper Controller circuit above and uploaded the sketch to the Arduino board, you should see some blinking lights indicating that your controller is up and running and ready to track the skies! }, void ledSpeedIndicator () //Common cathode (common GND) red and green LEDs You need to upgrade to a better (larger, more sturdy, better gear reduction, and more expensive) tracker by buying one or building one. Serial.begin(57600); //Baud rate used by PHD2 Guiding Night Sky in FocusAstronomy and Amateur Radio© Anthony Urbano (Manila, Philippines). The site requires javascript to be enabled for the best user experience. The high-torque stepper motor is directly engaged with the focuser via a timing belt. The OnStep Hand Controller use the ST4 connector to move the telescope. if (motorSpeed >= 48){ //Green indicates that the motor is operating at an RPM that is higher than the predefined value Control Your Telescope Using Stellarium & Arduino: I am fascinated by astronomy since the first time I looked to the night sky. for the ultimate in accurate auto-focusing. { Serial.println(“East/RA+#”); //Nudges the telescope towards the east while (digitalRead(buttonApin) == LOW && digitalRead(buttonBpin) == HIGH && meridianFlip == true) { //Checks if red button has been pressed Change ), You are commenting using your Google account. digitalWrite(7, LOW); checktrackingMode(); Anyway, assuming that you have achieved a proper polar alignment yet the tracker is still ‘not very accurate’, then perhaps you have reached the limit of the tracker’s capability, and replacing the circuit board will not do any good. if (digitalRead(buttonCpin) == HIGH && digitalRead(buttonDpin) == HIGH){ //Meridian flip mode is turned ON when the yellow and orange buttons are pressed simultaneously digitalWrite(7, HIGH); I decided to make my own telescope control system from the ground up and the Arduino platform seemed the obvious choice. The mount uses a 6-wire (unipolar) stepper motor, but operated in 4-wire (bipolar) mode, leaving two wires (the center taps) unconnected. motorSpeed = motorSpeed + 1; //Increases the motor’s rpm if (digitalRead(buttonCpin) == LOW && digitalRead(buttonDpin) == HIGH) { //Checks if yellow button has been pressed String command = Serial.readStringUntil(‘#’); Useful for alignment. const int stepperPin3 = 11; //Stepper pin Specifications and features: Type of applied motors: bipolar stepper motor; Max. Have you ruled out the possibility that you are simply not properly polar aligned? This is the reason why I would like to build a my own tracker (based on the Ioptron Skytracker design as opposed to a barn door design) which would enable me to track without having to rewind. DAOKI 5 PCS L298N Motor Drive Controller Board DC Dual H-Bridge Robot Stepper Motor Control and Drives Module for Arduino Smart Car Power UNO MEGA R3 Mega2560 4.7 out of 5 stars 84 $13.99 $ 13 . const int buttonDpin = 5; //Yellow push button switch, decrease speed }, void playLowTone() }, void readSerial() If you want to take a stab at amateur astrophotography, or have a telescope with “goto” or auto tracking capability, you either need to make a substantial investment in hardware and software, or you can built your own computer controlled mounts and use a variety of open source telescope guidance software packages. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. playHighTone(); const int greenLEDpin = 8; //Green LED speed indicator

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