This stepper motor gives you powerful precise auto-focusing without any fussing with extra tools. For this reason the are can be used in the dark, if wearing gloves, and there is no need to look at a screen. if (digitalRead(buttonApin) == HIGH && digitalRead(buttonBpin) == HIGH){ //Meridian flip mode is turned OFF when green and red buttons are pressed simultaneously playLowTone(); while (digitalRead(buttonApin) == LOW && digitalRead(buttonBpin) == HIGH && meridianFlip == false) { //Checks if red button has been pressed pinMode(stepperPin3, OUTPUT); //Stepper pin These can be either Equatorial or Alt-Azimuth mounts. Try to watch tutorials on stepper motors and Arduinos :). 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 . Only the pins 6,7,8,and 9 are used. { When tracking the sky, the motors turn at 12rpm. Serial.println(“East/RA+#”); //Nudges the telescope towards the east myFocuserPro is an ASCOM and Moonlite compatible stepper motor telescope focus controller (DIY) based on Arduino Nano/Uno. Can I add this to my celestron astromaster 130 EQ telescope mount. Motor Current: 0.8 A; Power supply: 12V, 2A, 5.5mm 2.1mm plug; The center pin of the power connector is positive Serial.print(“RPM:”); MoonLite Mini V2 controller Quick Guide can be downloaded here: Mini V2 Quick Guide. Stepper can be quickly detatched for manual focusing, or switching to our dc motor for nFOCUS control. Brand New Moonlite Cs 2” Focuser Mini Controller and High Res Stepper Motor | Astromart These motors are a marvel of technology and can rotate extremely slowly under Arduino control with zero magnetic cogging. ( Log Out / motorSpeed = motorSpeed/2; //Arduino spins the motor at 1/2X speed Thank you. Good luck with your tracker! The LakesideAstro motorised focuser system is designed as an add on for your existing telescope system. { You need to upgrade to a better (larger, more sturdy, better gear reduction, and more expensive) tracker by buying one or building one. Change ). Serial.println(“INITIALIZED#”); //Arduino replies with ‘INITIALIZED#’ once serial communication is established } Please take a look at FocusDreamPRO User Guide. This system was extremely slow, underpowered and unreliable. In achieving polar alignment, simply pointing at Polaris is not enough. playHighTone(); else if (command == “RA+” && meridianFlip==false){//PHD2 sends “RA+” over the serial port Now, I have no idea where to begin! (c) Copyright Robert Brown 2014-2021. Robot hacker Bruce Shapiro posed this question to the list: I’ve started another one of my “bits to bots” classes– this time out here at the local art center, and with adults. 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. else { Serial.println(“OK#”); //Arduino replies with ‘OK#’ The chip is configured to drive a 2 phase bipolar stepper motor. Our websites use cookies to improve your experience while you navigate through the Make: ecosystem. const int stepperPin1 = 9; //Stepper pin The site requires javascript to be enabled for the best user experience. Have you ruled out the possibility that you are simply not properly polar aligned? pinMode(redLEDpin, OUTPUT); //Red LED pin } First of all, sorry for the confusion…When I say that I would like to build a tracker based on the Ioptron or Fornax, I mean building a tracker using existing parts but not necessarily from those trackers. ... 23-08-2019 | Motor Controllers Firmware: Universal Stepper Motor Driver with Built-in USB port, Version 3.07. The stepper motor has a 0.1-degree step size and can effortlessly lift up to 8 lbs. Serial.println(“Meridian Flip ON: RA signals in reversed mode#”); you should do a tutorial on youtube that helps alot in explaining ! playHighTone(); This controller will only control one motor. 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). delay(1000); Otherwise, even the best and most accurate trackers in the world will be rendered useless. 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)? The serial protocol is compatible with Moonlite focusers, so their ASCOM drivers and supporting software can be used. }, void speedUp() Can we connect a Lcd display to this circuit? If you ever need to switch back to manual focusing, detaching the stepper motor is and quick and easy. Place your astronomy ads, read the latest news articles and check out the current reviews of newest telescopes and equipment. You May Also Like. (4 wire motor) I tested the circuit on a stepper that draws 200MA per winding and it seems to work properly. My first version of a stepper controller uses a 555 timer chip and a 74LS194 shift register. Serial.println(“OK#”); //Arduino replies with ‘OK#’ if (motorSpeed <= 1){ //Limits the rpm to a minimum value }, void checktrackingMode() motorSpeed = motorSpeed*2; //Arduino spins the motor at 2X speed Serial.println(“Meridian Flip OFF: RA signals in normal mode#”); Stepper motor has 0.1 degree step size, easily lifts 8 pounds. tone(speakerPin, 7040, 20); //High frequency tone feedback Serial.println(“West/RA-#”); //Nudges the telescope towards the west Pins 1,2,3,4, and 5 can supply + 12 volts for external transistors to power a stepper that will draw more than 500MA. } It's a nice mount (cheap, portable and very easy to use), but to get what you want to see, you… if (motorSpeed <= 48){ //Red indicates that the motor is operating at an RPM that is lower than the predefined value If this can be done, it would actually be even better since like you said, the Ioptron Skytracker already has a very decent gearbox system already. Save over 40% off the annual cover price for a full year (4 issues) of Make. But a quick search just turned up a bunch of individuals’ pages that didn’t have the pizzazz I think I remember once seeing. OnStep Telescope Controller STM32 PCB and ESP32 SHC Kits. If you want to build a tracker, first you should learn how to polar align. while (digitalRead(buttonApin) == LOW && digitalRead(buttonBpin) == HIGH && meridianFlip == true) { //Checks if red button has been pressed Hi, Eteny. } It should also work with well any well-built barn door tracker setup. // Eteny, http://www.nightskyinfocus.com. May I know what model of Arduino you using? I caught the following discussion on the Twin Cities Robotics Group’s mailing list today. speedUp(); USB Cable (3M) for PC Control (may also be powered via USB) 12V/1.5A power supply. motorSpeed = 100; } With an open loop stepper motor system, the motors are commanded to move: there is no feedback that the movement took place. In this project, I have used an Arduino Uno R3. } 99 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. if (motorSpeed >= 100){ //Limits the rpm to a maximum value obtained through experimentation { pinMode(greenLEDpin, OUTPUT); //Red LED pin }, void loop() } const int buttonApin = 2; //Green push button switch, speed up Geckodrive G540 4 Axis Bipolar Stepper Motor Controller. if (digitalRead(buttonCpin) == HIGH && digitalRead(buttonDpin) == HIGH){ //Meridian flip mode is turned ON when the yellow and orange buttons are pressed simultaneously playHighTone(); Telescope control with stepper motors. Having said that, part of the reason I want to do this is to learn about Arduino which seems to be a pretty amazing platform. { { 1. Anyway, let me know if you are modifying or building from scratch. The DMC-21x5 is the latest addition to the Econo family and is an easy upgrade path from the long running DMC-21x3 series. Main features: Interrupt-driven motor control for fast and accurate operation (up to 1000 steps/s) Simple, Low Cost and Accurate Stepper Motor Driver: I built this to drive the stepper motor on a telescope mount. Other components have also been added to allow other devices such as a GPUSB to communicate with the telescope. The OnStep Hand Controller use the ST4 connector to move the telescope. if(command == “CONNECT”){ //PHD2 sends “DISCONNECT” over the serial port $360.00 New. speedUp(); motorSpeed = motorSpeed*2; //Arduino spins the motor at 2X speed slowDown(); tone(speakerPin, 55, 50); //Low frequency tone feedback Motorize your focuser with the powerful Rigel nSTEP Stepper Motor. OK, thanks alot ;-). digitalWrite(7, LOW); What I am really interested in doing, is building a microcontroller based driver with an autoguiding system the way you did, although I would prefer a stand alone auto guider since want to keep things simple and without having to use a laptop. FocusCube can provide digital precise focus control from a PC. 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. All Rights Reserved. pinMode(stepperPin1, OUTPUT); //Stepper pin The mount uses a 6-wire (unipolar) stepper motor, but operated in 4-wire (bipolar) mode, leaving two wires (the center taps) unconnected. } I am sure their engineers have already programmed those boards to track as precisely as possible. I much appreciate your time and input. } int speakerPin = 6; //Tones are used as feedback playLowTone(); } playLowTone(); //Plays audio feedback I have an extra one that I am considering using as a camera rotator motor. const int stepperPin2 = 10; //Stepper pin playHighTone(); { An external digital temperature sensor input is located near the motor connector. motorSpeed = 48; //RPM reverts to the predefined value if (digitalRead(buttonCpin) == HIGH && digitalRead(buttonDpin) == LOW) { //Checks if orange button has been pressed Once the shield board is ready, take the box and start to lay out all of the … Thank you very much for the prompt response and the willingness to help! const int buttonDpin = 5; //Yellow push button switch, decrease speed There are key steps here: (1) you need to build a board that can make a motor spin at a constant speed, (2) look for a suitable gear system/drive configuration, (3) attach the motor to the gear system/drive, (4) spend some nights “adjusting” the motor’s speed, and (5) finally testing your tracker. while (digitalRead(buttonApin) == HIGH && digitalRead(buttonBpin) == LOW && meridianFlip == true) { //Checks if green button has been pressed Here you can see the … Anyone can study the code to know how it works, modify it for their specific needs, and share the source code as they wish. I would advise against replacing the circuit board of Ioptron (or any other tracker for that matter) esp if it is not broken. for the ultimate in accurate auto-focusing. BBAstroDesigns – Computer Operated Telescopes, Mel Bartels’ Telescopes and Telescope Making, Get dozens of projects in every issue covering DIY electronics, 3D printing, craft, and more, Learn tips and skill-building tutorials from experts in the maker community. delay(200); motorSpeed = motorSpeed – 1; //Reduces the motor’s rpm motor.setSpeed(motorSpeed*2); //Spins motor at a 2X the predefined speed const int stepperPin4 = 12; //Stepper pin Dual Motor Focus brings a decade of experience in astrophotography and telescope focusing concepts. Go to next slide - Top Rated. Serial.println(“#”); I suspect some of you may be able to point us in the right direction? Two methods of motorizing telescopes are open loop stepper motors and closed loop servo motors with tachometer or encoder feedback. Figure 1: DMC-2145 and DMC-2185 Motion Controllers. Stepper Motor for GSO LF 2" and 3" Focusers Motorize your GSO LF focuser with our powerful stepper motor. digitalWrite(8, LOW); motor.step(1); //Replace value with -1 if you wish to reverse the rotation of motor if (Serial.available() > 0) String command = Serial.readStringUntil(‘#’); A DC motor option with simple hand controller, or one of 3 different High Res Stepper Motor options. const int buttonCpin = 4; //Orange push button switch, increase speed slowDown(); while (digitalRead(buttonApin) == HIGH && digitalRead(buttonBpin) == LOW && meridianFlip == false) { //Checks if green button has been pressed Change ), You are commenting using your Google account. Stepper motors move in precise increments of (usually) 200 full steps per Serial.print(motorSpeed); }, void playHighTone() pinMode(stepperPin4, OUTPUT); //Stepper pin //Stepper pin } cheers po clear skies! Basically, I’d like to save him from reinventing this wheel. In response to your reply. } playHighTone(); It was also impossible for me to change the programming or maintain the system. delay(1000); } 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. The probe can be placed near the focuser so the exact temperature of the focuser / environment can be seen through the supplied software or ASCOM driver const int redLEDpin = 7; //Red LED speed indicator }, void playLowTone() 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 have two options in mind, one is a tracker system based on the Ioptron Skytracker and the other is a friction drive system based on the Fornax10 light mount ii. 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. decreaseSpeed(); Enter your email below to receive posts on astronomy and amateur radio. Depending on what you choose to do, you can completely automate your scope for somewhere between $100 and $500. BBAstroDesigns – Computer Operated Telescopes FocusLynx Controller Specifications Functional Specifications: Stepper Motor Control: bipolar and unipolar stepper motors, Resolution: 16-bit controller with 65,535 step range per focuser, PC Connectivity: USB/Serial, Ethernet, or optional 802.11 WiFi, Hand Control: Optional 2-button with Digital Read-Out, ( Log Out / This controller compatible with Robofocus and Moonlite stepper motors. digitalWrite(8, HIGH); pinMode(stepperPin2, OUTPUT); //Stepper pin The Pegasus Astro stepper motor kit is easy to install on an imaging refractor telescope, and the included software works as intended right out of the box. MoonLite Stepper motor Software / operation instructions for the Mini V2 controller and DRO dual port display controller can be downloaded here: High Res Stepper Motor Combo 2015. motor.step(1); //Replace this value with -1 if you wish to reverse the rotation of motor Useful for alignment. readButtons(); digitalWrite(7, HIGH); When I let go of joystick, the telescope stops moving. Twin Cities Robotics Group, Illustrated Guide to Astronomical Wonders: Get it now at the Maker Shed. Serial.print(“RPM:”); For me, the process of installing the stepper motor to my telescope involved disassembling the focuser drawtube. Submitted by Khalid on ... we mean that this kit still requires a case, and does not come with stepper drivers. We use cookies to optimally design and continuously improve our websites for you, as well as to display news, articles and advertisements in line with your interests. But opting out of some of these cookies may have an effect on your browsing experience. The stepper motor will be provided with a customised bracket to connect the motor to the telescope and a shaft coupler that will replace one of the focusing knobs of your existing foc… Let me know your thoughts and where you think I should start. Change ), You are commenting using your Facebook account. After completing my homemade telescope mount it was powered by a Meade DS motor kit. I sourced my own Stepper motor and 1:150 reduction gearbox from RS, who are just up the road. else if (command == “RA-” && meridianFlip==false){ //PHD2 sends “RA-” over the serial port It contains a wealth of information for hobbyists looking to build a DIY computer operated telescope. MELIFE 5Pack L298N Stepper Motor Driver Controller Board Dual H Bridge Module for Arduino Smart Car Power UNO MEGA R3 Mega2560 4.9 out of 5 stars 26 $8.99 - $11.58
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