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Code, circuits, & construction

Code, circuits, & construction
A stepper motor is a motor controlled by a series of electromagnetic coils. The center shaft has a series of magnets mounted on it, and the coils surrounding the shaft are alternately given current or not, creating magnetic fields which repulse or attract the magnets on the shaft, causing the motor to rotate. This design allows for very precise control of the motor: by proper pulsing, it can be turned in very accurate steps of set degree increments (for example, two-degree increments, half-degree increments, etc.). They are used in printers, disk drives, and other devices where precise positioning of the motor is necessary. There are two basic types of stepper motors, unipolar steppers and bipolar steppers. Unipolar Stepper Motors The unipolar stepper motor has five or six wires and four coils (actually two coils divided by center connections on each coil). Bipolar stepper motors The bipolar stepper motor usually has four wires coming out of it. Two-Wire Control BX-24 code: PicBasic Pro code: Related:  3D PrintingMotors

Operating Two Servos with the Arduino The Arduino can control two servos with the same ease as one. All it takes is creating a second instance (copy) of the Servo object, giving it a unique name. For example, in a two-wheeled differentially-steered robot you might call one servo object servoLeft, and the other servoRight. The Arduino lacks direct connections for attaching the servo motors. Refer to Figure 1 (schematic) and Figure 2 (pictorial) for wiring the solderless breadboard. [Figure 1] [Figure 2] Note that you want the version of male header pins that are “double-sided”—they’re long on both sides. The reference design uses an AA battery holder with a four-pin female connector. When wiring the solderless breadboard, be especially careful not to mix positive and negative leads to the servo. Here’s an important note: the ArdBot uses separate battery supplies for the Arduino and its two servos. Make sure to also properly orient the connectors for the servos when you plug them into the board. Servo Test Sketch

MendelMax 1.5 with integrated electronics by srepmub I just finished my 1.5 (lm8uu) build, and in the spirit of open source decided to list the important parts I used here. First, I designed the following two things to be able to raise my MendelMax, so that I could mount the PSU and electronics inside, on an integrated floorboard: To protect the PSU from falling debris, aluminum netting used in model building worked really well (awesome stuff btw): Rather than print clips to hide the wiring, I found that electrical tape works well and looks great: The following are wonderful x-ends, though they ended up a bit too flexible for my taste (may be my fault, or some parts are just too thin): As for the x and y cars: Extruder, also from Jonas Kuehling:

How to Wire Your Stepper | EBLDC.COM You have a stepper motor and you are wondering how to wire it to your driver board. If you have a four lead motor, then that is plenty easy. But what if the motor has five, six or even eight wires? What can you do with them? In this article I do not detail how to determine which phase is which as I have covered that topic on a different posting. The Four Wire Stepper Motor There is not much detailing here. If you have the motor datasheet then you know which wires represent which. Once you have determined both phases, you can wire your motor as shown on the picture above. The Five Wire Stepper This motor is also equally easy to deal with as it can only be wired as an unipolar stepper motor. But how do we learn which the center tap is? The Six Wire Stepper We can now start to complicate things. So lets first see how to wire the six wire stepper as a unipolar motor: Fear not! OK, now we can follow with the truly messy stuff. What is the solution? There is one caveat, however.

Arduino and 7 Segment LED 7 Segment LED Click here to like us on Facebook! How many TV shows and movies have you seen with some mysterious electronic device counting down to zero on one of those 7 segment LED displays? If we were in that situation, we would be thinking: "Wow, where did they get that in cool blue? "I wonder if it has a common anode or cathode?" "That would take up a lot of IO pins on an Arduino." The seven segment display is a pretty simple device. Video Demo of Arduino 7 Segment LED * This tutorial has been updated with info for our new common cathode, seven segment LEDs * Hardware used in this tutorial: Arduino board, Solderless breadboard, jumper wires, and the blue or red seven segment LED. Instructions: If this is your first Arduino project, first go through our “Arduino: Getting Started” and “Beginning Solderless Breadboards” tutorials. Use our LED resistor calculator to calculate the resistor value that won't destroy your LED! Software This Arduino software example counts down from 9 to 0.

Skeinforge settings unfold, You can click 'Add Profile' in the extrusion dialog, the new profile will be a copy of the old selected profile. For example, in the extrusion dialog, select ABS, then type 'ABS_UserSettings' and click 'Add Profile'. arhimed, Thanks for the settings, I've added them to the latest version at: [] sam0737, A few people have asked to work on skeinforge and one sent a patch. Documentation is very useful, and does not affect the program, so it is the best way to start. In general, people who want to help the reprap project or their own fabrication often figure it would be a good idea to tweak skeinforge. Making filament from granules. Any of those could be made without have some weird interactions with the project, and they are all more useful then even a large improvement in skeinforge. I appreciate the offer of programming help, and indeed when I first started developing skeinforge I thought extra programmers would speed things up. Cheers, Enrique

Arduino/Junk pile stepper motor survey - Wikiversity - FrontMotion Firefox The purpose of this page is to record the wiring of junked stepper motors to arduino motor shields. Stepper motors have 4 or more wires going into them. Not all motors with 4 or more wires are stepper motors. Typically these motors do not settle down and display a constant ohm value. Instead the resistance reading go to zero or infinity. Next Steps[edit] Attach motor shield to larger power source .. 9-12volts .. perhaps up to 1.5amps. Individual Motor Details[edit] Electronics : Microprocessors : How to make an Arduino-compatible minimal board Make your own board Once you have been playing with Arduinos for a while you probably are thinking that you want to deploy one, but without the expense, and physical size, of using a whole new Uno board. This post describes how to do that. AtMega328P chip We will start off with a "raw" Atmega328P-PU chip, the sort of thing you might buy off the shelf from Digi-Key, Element14, or other suppliers: Note that pin 1 is at the end where there is a notch in the plastic and an extra hole on the top. The chip itself can be purchased for around $US 3. Anti-static precautions To avoid "zapping" your chip avoid handling it by the legs. Minimal wiring The chip pinouts are: The very basics are to wire +5V to VCC and AVCC (AVCC is the analog power in), plus both GND pins (normal and analog). Connected are: +5V to VCC (pin 7) (red wire)GND to pin 8 (blue wire)+5V to AVCC (pin 20) (red wire)GND to pin 22 (blue wire)Connect /RESET (pin 1) to +5V via a 10K pull-up resistor Power supply Test the chip Wiring Type "L" ...

Sanguinololu, LCD and rotary encoder with switch Having seen the PanelMax LCD and Encoder for RAMPS, I wanted to get a similar setup working on Sanguinololu. the first step was to get an ATmega 1284P working and load Marlin firmware which supports this sort of setup with minimal changes. Wiring and Testing I intended to keep using the SDSL card reader (not much point in having a screen if you have to have you computer plugged in) which left very few pins unused on the microprocessor. Conveniently these are all together on the expansion header: The image is grabbed from the .brd eagle file - easier to show than on an actual board. For the LCD; RS "PWM" Digital pin 4 ENABLE "SDA" Digital Pin 17 D4 "A1" Digital Pin 30 D5 "A2" Digital Pin 29 D6 "A3" Digital Pin 28 D7 "A4" Digital Pin 27 For the Encoder; EN1 "RX1" Digital Pin 10 (must be a hardware interrupt pin) EN2 "TX1" Digital Pin 11 (must be hardware interrupt pin) SW1 "SCL" Digital Pin 16 (Click switch) Adds up to 9, just enough! I connected the circuit up (quickly, I was impatient!)

How Can I Determine My Stepper Motor Wiring Without the Stepper Motor Pinout? - National Instruments Hardware: Motion Control Problem:I have a stepper motor but do not have the pinouts for the motor. How can I determine how to wire my stepper motor without the pinouts? Solution: In general, 2-phase stepper motors can have 4, 6 or 8-wire leads (not including any optional encoder lines). If the stepper motor wiring is known, then consult your motion controller user manual (see Related Links section for links to National Instruments Motion Controllers) for how to connect the stepper motor to your motion controller. Some stepper motors have a motor case ground that can be tied to the ground of the system. If you have four coil wires from the stepper motor: Approach 1 (using a multimeter) Each of the two phases should have the same resistance when measured with a multimeter. Attachments:

FrSKY Telemetry Projects - Flytron Projects This tiny PCB including only 3 component for measuring the 0-36V over FrSky’s brilliant analog voltage input. Our new FrSky telemetry display supporting this sensor. You can build it your self or buy from our shop. Hi Guys Here is the our new telemetry firmware (v2.6 didn’t released yet) and ground station software. We removed IR sensor from simpleOSD on SimpleOSDv2 boards and we are using It’s signal and ground pins for telemetry output. This output %100 compatible with FrSky v2.0 telemetry Rx & Tx modules. Yesterday we made a Nokia LCD adapter for using this cute screens. Hi Everyone, We are designing a new and Opensource LRS system with telemetry and Our Tx and Rx modules will include RS232 ports like FrSKY.

Panelolu Panelolu Release status: working Introduction You can use this page as a guide for wiring up any SD card/LCD/encoder/reset combination to your electronics. Instructions here are for Sanguinololu, RAMPS and Printrboard, but it should be easily adapted for others like Melzi, RAMBo and Azteeg. Panelolu is an LCD and rotary encoder with a click button control solution which derives from the PanelMax Prusa by tommyc. The Panelolu is designed to use as little soldering as possible (if the breadboard comes pre-assembled and the LCD with plugs fitted then no soldering is required at all) and to allow an easy upgrade path. The schematic is a little tangled but each wire can be traced from the Sanguinololu - through the 24 way IDC connector and ribbon cable to its final destination in the enclosure. Where to buy The Panelolu has been superseded by the Panelolu2 so kits are no longer available however parts can be self sourced and these instructions used to assemble one. Files Assembly instructions Tools

A Python class to move the stepper motor | Stephen C Phillips - FrontMotion Firefox To properly control the stepper motor from the Raspberry Pi we need a class to represent it. This is one of the most direct ways of understanding object oriented programming (OOP): from the class you make an “object” and the object represents and controls an object in the real world (the stepper motor). The class lets us remember (and control) all the information we need: the pins the motor is connected on;the speed of the motor;the angle the motor is currently pointing to. The motor seems to have 4096 positions (steps) it can point to. These don’t correspond exactly to degrees. Actually, it doesn’t move to the step position that is closest to the angle, it chooses step positions that are divisible by 8 because the control sequence has 8 steps in it and I didn’t want to bother starting or stopping in the middle of the sequence. If you save it as “” you can run it using “sudo python”.

Blog : Hacromatic: Electronics kits and projects worldwide I couldn’t find much information about how to use the Arduino motor shield (as of late 2012), so I thought I’d show how to set up the connections for both stepper motors (4, 5, 6, and 8 wires) and DC motors, along with some basic sketches to drive them. Stepper Motors Steppers can be broadly classified as 2/4-phase or 5-phase. This breakdown covers the vast majority of stepper motors you’re likely to encounter. 5-phase motors typically provide lower vibration and smaller stepping angles than 2 and 4 phase motors, but they are less common and won’t work with the Arduino motor shield, so I’m not going to talk about those here. That leaves 2/4 phase motors. 8 Wire Stepper Motors If you have the wiring documentation for the motor then you can skip ahead to the section on power supply issues. When you’re first starting out though, or if you’re unsure about the motor, it doesn’t hurt to make a resistance table, for each wire pair, like so: Label the 4 wire pairs a:b, c:d, e:f, and g:h.