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Questions tagged [position]

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Locking BLDC motor rotor for encoder zeroing calibration

I know the title of this post is a real tong twister but my brain is in much worse condition as far as what's goin on here. Basically I have a motor that I'm installing an encoder onto so it can be ...
Dave2022's user avatar
1 vote
1 answer
36 views

What are the potential risks and consequences of storing Bolt Terminals Sealed Lead Acid AGM (VRLA) Rechargeable Battery in a 90-degree orientation?

I am interested in understanding the potential risks and consequences of storing the TLV12280 - 12V 28Ah, F3 Nut & Bolt Terminals Sealed Lead Acid AGM (VRLA) Rechargeable Battery in a 90-degree ...
k06ynzea0w_plancetose.com's user avatar
0 votes
0 answers
65 views

BLDC motor position control

For my project, I need to control position and speed of a BLDC motor with PID. Although there is information about the speed control of the motor, I could not find much information about the position ...
fefef's user avatar
  • 1
1 vote
3 answers
197 views

Detect the 2D position of a ball hitting a 6ft x 6ft wood target [closed]

My son is 10 years old just starting to play baseball and loves pitching. He is constantly throwing a ball at a wall trying to get better. He also loves technology so we want to help him where we can. ...
Nikki's user avatar
  • 11
3 votes
2 answers
483 views

Can a BLDC motor be actively retarded (braked) by decreasing the electrical drive frequency?

I need to implement very fine (positioning) control of my BLDC motor system, one which has significant inertia. Basically servo control of a weighty object. Is it possible for a BLDC motor be retarded ...
Ant Williams's user avatar
0 votes
1 answer
116 views

Reference switch: which position and NC or NO?

I have a small linear axis, which is operated with a stepper motor. I need a reference switch to determine the position. My question is, do I run this switch as normally closed or normally open? Also, ...
Interpreter67's user avatar
1 vote
0 answers
74 views

Reverse trilateration / multi-lateration using BLE Beacons

I'm currently working on a proof-of-concept to work out the estimated locations (longitude and latitude) of outdoor beacons with unknown locations to begin with. The solution will use a mobile ...
LawrenceH's user avatar
  • 111
0 votes
1 answer
975 views

Does PWM control DC motor's speed or position? How to control DC Motor's position?

The type of motor that I am working with is a 12V brushed permanent magnet DC motor. By following this video by Mr. Paul McWhorter I was able to control the speed of my DC motor by using the ...
Quadro's user avatar
  • 141
-1 votes
1 answer
606 views

What is the meaning of the term "with/without positioning bosses" in connectors ? (for AXK6A2337YG AND AXK6A2347YG) [closed]

I need to understand what is the meaning of positioning bosses? Since the model I need is one with positioning bosses, but almost all available on internet are only without positioning bosses, so is ...
FindOut_Quran's user avatar
1 vote
1 answer
684 views

Single-loop (PID) vs Dual-loop (i.e P-PI) servo position controllers difference?

I am wondering why the servo position loops are mostly dual-loop consisting of position and velocity loops while the position can be controller by using only the position PID controller. I am aware ...
controlsHeaven's user avatar
1 vote
2 answers
201 views

High frequency BLDC control for parallel speed and position control. Looking for thoughts

I was not able to find a similar topic but am kind of stuck with my problem. What am I doing? I am trying to control the speed of a BLDC Motor very precisely but have to control the position of the ...
sebbe's user avatar
  • 11
0 votes
0 answers
160 views

The best control strategy to determine the 0 position of a hall sensor linear actuator

I am using a TA29 Timotion, with hall sensor as a feedback. To determine its position, the actuator should be in position 0, before it starts counting. What is the best way for me to do this without ...
Julius's user avatar
  • 73
0 votes
3 answers
4k views

How to detect 3 way slide switch positions?

With one of this 3 position 8 pin slide switches, I want to detect all three positions: Required function: Position 1: Node1 to ground Position 2: None Position 3: Node2 to ground If I pull an ...
ElectronSurf's user avatar
  • 2,396
0 votes
0 answers
246 views

How does this linear actuators know absolute position of their carriages?

As title, I can't find out how main system of this linear actuators knows each carriage absolute position. This system is iTRACK from Rockwell, but there are some other brands that do this. Here an ...
Singed's user avatar
  • 457
1 vote
1 answer
73 views

µC control of a force testing machine

At work we have a machine that is used for testing and calibrating force sensors. It basically consists of a huge lever that is actuated by an electric motor with a gear reduction and a calibrated ...
Crazor's user avatar
  • 435
4 votes
3 answers
191 views

Detect drones passing through hula-hops

I host some drone races at times and I make gates with hula-hops. I fit some led stripes in there and they glow nicely. We ONLY run micro drones, F36, tinny whoop and those. And mostly indoors (...
javirs's user avatar
  • 185
1 vote
0 answers
451 views

Measure relative position between two IMUs

I'm trying to create a system where I need to measure the relative orientation of the edge of the arm with respect to its base: The apparatus will be like in the diagram above. To measure the ...
KTB's user avatar
  • 111
2 votes
1 answer
99 views

IR emmiter and receiver layouts for custom sensor

I'm having a hard time designing a PCB for a sensor array that need to detect if there is a small reflective object (3-20 mm section) in the way. That object can slowly rotate around a shaft. I have ...
guillem cabo's user avatar
0 votes
1 answer
217 views

How to move a magnet to a specific coordinate on a board

I was just reading about Claude Shannon's famous maze-solving mouse, Theseus, which used a movable magnet under the maze to draw the mouse in a given direction. I'd like to play around with this idea. ...
Chris Wilson's user avatar
3 votes
2 answers
3k views

What is the main reason for using speed feedback in a motor positioning control system?

This question is not to solve a particular problem but rather one of principle to understand the main reason a designer would want to include speed feedback in a motor controlled positioning system. ...
docscience's user avatar
0 votes
1 answer
102 views

Voltage regulator position

Hello if unregulated power supply (transformer, bridge and main caps) is 30 cm away from the circuit to feed, is it better to put the voltage regulator close to the circuit (long input and short ...
Gianluca G's user avatar
-1 votes
1 answer
222 views

How can we achieve position accuracy with simple worm gear box. [closed]

I am also proposing to use simple 40:1 ratio worm gear box with Input servo motor. I am having a dial of 1600mm diameter on output of the gear box which will rotate only in clockwise direction at max ...
Maindarge's user avatar
1 vote
3 answers
1k views

SSD1306 I2C: Draw only changes works however on wrong position, how to set position (command)?

I create an OLED display class for the SSD1306 and how it works is pretty straight forward. The display is buffered (offscreen method) and at performing an update, it 'dumps' the buffer to the display ...
Codebeat's user avatar
  • 1,367
1 vote
2 answers
497 views

Acceleration sensor gives wrong values

I am trying to measure distances with the 3 axis accelerometer that is part of the LSM9DS1. I measure the acceleration in X-axis and Y-axis every 5ms and double integrate it over the time. I can ...
thorb3n's user avatar
  • 31
0 votes
1 answer
3k views

Measuring the angle to an object using IR sensors?

I would like to be able to use IR emitter/receivers to measure the ANGLE to an object. As far as I am aware this is how the Sharp IR distance sensors work, by using triangulation to measure the angle ...
Mike McRoberts's user avatar
6 votes
3 answers
2k views

In theory, is the position derived from accelerometer absolute?

I recently found multiple research papers that say that in theory double integral of accelerometer data gives a position of the device. Does that refer to absolute position (like the one given by a ...
Maja's user avatar
  • 63
0 votes
2 answers
279 views

Tracking position of juggling balls

I am working on a performance art project in which I want to track the position of juggling balls as they are thrown in the air. The idea is to output a sonification of the ball's position in the air ...
Slidon's user avatar
  • 101
1 vote
1 answer
119 views

Determening the location of a ball contacting a surface

I'm a student currently working on a project. I have two objects, one of which is a plastic ball. The other is a rectangle which is being hit with said ball. My goal is to detect a position of a hit. ...
Lazyboy's user avatar
  • 535
1 vote
1 answer
718 views

Maintaining fixed shaft position of BLDC/PMSM

I intend to control the position and speed of a BLDC motor (still to be selected) using field oriented control (FOC) and an Encoder to determine shaft position and speed. From what I understand from ...
gapsna's user avatar
  • 21
0 votes
1 answer
300 views

Speed and position controle of a BLDC motor at the same time

I want to know if it is physically possible for a BLDC motor to be controlled in speed and position at the same time. Let me clarify : while the rotor is spinning (speed control), is it possible to ...
Tagadac's user avatar
  • 453
3 votes
5 answers
4k views

Using a potentiometer to replace an absolute optical encoder

I am trying to replace a rotary absolute optical encoder (single turn). The resolution of the encoder is 13 bits (8191). The reason for the replacement is to reduce the cost. My approach is to get a ...
ElectronS's user avatar
  • 3,239
0 votes
1 answer
114 views

Precision positioning system

I'm looking for a sensor that can track its own position in 3D with an absolute accuracy of around 0.5inch over a 50-100ft area. I think this is better than what GPS or inertial tracking can ...
Alex I's user avatar
  • 3,491
3 votes
2 answers
661 views

How to locate my cats in my house? [closed]

I have two cats and want to track in which of the 6 rooms of my flat (about 96 square meters) they currently are. Later I would like to trigger an alarm if they get into a "forbidden" room. The cats ...
muffel's user avatar
  • 171
1 vote
3 answers
201 views

How accurate is a single GPS at detecting distance traveled?

I read that consumer grade GPS is accurate 5-10 meters at resolving global positioning coordinates. However, my question is how accurate is consumer grade GPS at detecting distance traveled. For ...
Jamey McElveen's user avatar
0 votes
1 answer
1k views

Triangulation Vibration Sensor Impact Detection Position

I am working on a project to detect the position of an impact using three vibration sensors each one of them linked to a micro-controller(in my case STM32F4) . Using ADC and UART ,I can plot with a ...
Youssef Kamoun's user avatar
1 vote
4 answers
1k views

sensor to detect rope position, as it nears the end of the line retreval

I have built a winch for a 4wd, to race with. I would like suggestions on a sensor to detect rope position as it nears the end of the line retrieval. Not at the drum end, as that may vary. Something ...
C Fraser's user avatar
0 votes
1 answer
55 views

static position and orientation sensing

I have an application to sense magnetic north and position. GPS works well for position but cannot determine orientation without spinning the object 3 times. My application is stationary and I cannot ...
Stewart G.'s user avatar
0 votes
2 answers
85 views

Best Hardware for Accurate Point Tracking System

Here is what I am trying to accomplish: In the middle of a room, I have a mechanism with a laser diode mounted on it that can be moved in all axis by a motorized pan/tilt head type device. This ...
Christopher Klinck's user avatar
3 votes
1 answer
3k views

Determining an aproximate position through triangulation

Disclaimer: I'm relatively new to electronics (although not to programming) so please excuse my ignorance. First of all I should state that I'm aware there are already multiple, well answered posts ...
AvidScifiReader's user avatar
0 votes
1 answer
992 views

Does position error from accelerometer still build up quadratically when using Kalman filtering?

I want to implement an inertial navigation system that uses a basic IMU for indoor position tracking. From all the things I've read you need to assist the IMU with something like GPS or other means of ...
user8363's user avatar
  • 157
1 vote
4 answers
427 views

Best methods for long term position tracking?

I am in the beginning stages of development for a project where I need to continuously track the position of an object for long amounts of time. The object will not move very much, but when it does I ...
user8363's user avatar
  • 157
0 votes
1 answer
87 views

potentiometric position sensor

I would like to wire my position sensor (Datasheet) into Arduino. I plan to connect it with Arduino 5V supply and then read analog input values. It is potentiometric sensor and has 3 wires. After ...
Dado87's user avatar
  • 21
0 votes
1 answer
2k views

outdoor ultra sound positioning system robotic lawn mower [duplicate]

I have a dream to build robotic lawn mower that uses a positioning system, so that can cut grass once and effective. Building the robotic lawn mower is not a problem, but the navigation system is, so ...
user45189's user avatar
1 vote
2 answers
637 views

Recording motion/movement sequence efficiently & accurately

We have a motion platform (camera - pan & tilt) that is controlled by a user using a joystick (so the demand inputs are pan & tilt velocities). The platform itself uses stepper motors, so we ...
John U's user avatar
  • 7,159
16 votes
4 answers
2k views

What are my options for detecting the position of a small moving metal object?

This is an airgun pellet trap: I fire small metal pellets at it (4.5mm = .177" in diameter) at up to 120 m/s = 390 fps. What are my options for detecting the X / Y position at which it enters the ...
Tobia's user avatar
  • 767
0 votes
1 answer
4k views

Feasability of an Arduino indoor positioning system using BLE

Our project is to guide a blind person in a known environment (here it's an exposition hall), and we need to have a precise way of figuring out where the user is. Our current solution is to use ...
Linkyu's user avatar
  • 101
1 vote
1 answer
368 views

Reading a resolver sensor with a long cable

I am trying to read a resolver sensor attached to a stepper motor through a long cable (500 meters). More specifically with a resolver to digital converter. However I get an error respect to the ...
rpicatoste's user avatar
2 votes
0 answers
341 views

what is an affordable indoor 3D positioning sensor setup?

I have a question regarding a problem that seems easy, but after already doing some internet searches, seems not to be that easy to solve. I have a non-moving test setup in a large room where I have ...
Hardev's user avatar
  • 21
1 vote
1 answer
68 views

can I wire a ceiling fan to a 4 DP toggle switch?

I want to re-purpose a ceiling fan motor and would like to have each of the three speeds available on their own switch (or position on a toggle). Is this possible? and if so how should I go about this?...
Mokumemetalarts's user avatar
2 votes
3 answers
709 views

Violin bow position tracking with SMD LEDs and photoresistors

Objective: Marking labels indicating the positions of the violin bow on an acoustic signal, for example, a single musical note played by a full-length bow. The following video shows the example I am ...
Fred's user avatar
  • 23