Questions tagged [force-sensor]
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How to detect when a stepper motor has stalled?
How can I detect when a stepper motor has stalled? A google search led me to some people who say that when the stepper motor stalls, the current spikes up, which is easily detectable with a Hall ...
How does a six-axis force/torque sensor work?
I would really like a six-axis force/torque sensor for my robot, but I just can't afford one. I was thinking about making one of my own. I have experience using strain gauges, but I can't work out ...
How to limit large acceleration and jerk from PID controller?
I am trying to control a robotic arm with force input. The output of the force sensor is filtered, and fed through a PID controller to command the end-effector velocity. However, the robotic arm has ...
What is the Name of the part I'm describing
I'm looking for a part that will do a particular function. It has to be able to move along one axis and tell me the force that is being exerted on it. Kind of how like a piston moves inside an ...
Understanding the readings of Force Torque sensor based on accuracy and precision
I am working with a 6-axis force-torque sensor to measure the thrust and moments of a model jet engine. I want to understand the significance of the accuracy (measurement uncertainty) and precision (...
Force-torque sensor reading when a robot is stationary
Let's say I have a robot arm with a force-torque sensor on the wrist, between the final motor and the gripper. If the arm and wrist are stationary, then what would the reading on the sensor be? I know ...
Appropriate control scheme for gripper end-effector
I want to use a gripper end-effector (3 fingers, single actuator tendon-driven with force sensors in fingers) to grip and hold fragile objects such as an egg. I can not seem to figure out which ...
How to detect writing on a chalkboard? [closed]
I've got an idea for a simple robot (with an Arduino or something similar) that will play noughts-and-crosses (aka tic-tac-toe) on a chalkboard, so that kids can play against it. It will use a couple ...
How to Implement a Physically Human-Controlled Robotic Arm?
I'm a complete beginner in robotics other than FIRST competitions at my school. I wanted to make a robotic arm that works by a person physically moving the end-effector in 3D space and the robot ...
Sensing torque of stepper motor
I need to sense the torque of a stepper motor at any given time. I'm planning to tension a wire by using a stepper motor, and in order to keep the wire at a fixed tension I would need to know the ...
Why is the contact force of the rigid-body robot model ks*xr?
In the paper "On Dynamic Models of Robot Force Control", which is written by Steven D. Eppinger and Warren P. Seering, there is a model 'rigid-body robot model'. The model is like below. In the ...
Measuring torque of Vex gear shaft - highest accuracy for lowest price [closed]
I am seeking to collect data for my IB Physics IA (internal assessment). My question seeks to establish the relationship between speed and torque by adjusting gear ratios. (I am aware that gear ratios ...
affordable and easy to use one dimensional force sensor or load-cell [closed]
In our lab we mostly use ATI 6DOF force sensors, but they are so difficult that I just want to kill myself every time I have to use them. The reasons I don't like them are: For the version I have (...
Force sensors output when inclined
So here is the context: I am working on a motorcycle simulator. It consists of a motorcycle frame mounted on different actuators (see picture on the left). In particular, the two actuators at the ...
Which sensors can be used to feel breeze blowing by the robot?
Am faced with a situation where my robot needs to feel breeze blowing by over its artificial skin. While there exist many types of tactile sensors, nothing seems to fit the bill. I might abandon the ...
FPGAs and stepper motors for precision control
I'm looking at this Dexter robot that uses FPGA controllers to get really accurate position and force sensing on a cheap ($2K) arm. They say that the speed of the processor lets them get this accurate ...
Can a robot or mechanical part be programmed to exert a specific force
So I was thinking about projectiles that don't need a propellant like gunpowder I've seen coils gun but that's a little out my way. I was wondering if I know the force required to propel a object ...
Detect physical touch/hit
I'm making a target to an outdoor robot competition. The target should detect if some of the robot got touched or got an hit automatically. and the target can get hit 360 degree. I'm searching ...
6DOF robot arm: Velocity of end effector vs. joint velocities
I have a 6 DOF arm whose velocities I'm controlling as a function of force applied to the end effector. The software for the robot allows me to input either the desired end effector velocity or the ...
How to compute the force applied to point P given the torque registered by the sensor?
I have the following set up: I want to understand how to compute the force that is being applied to the F_knife point given the Force/Torque registered by the sensor at T_Sensor. The position vector ...