Questions tagged [force-sensor]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
16
votes
5answers
26k views

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 ...
16
votes
1answer
2k views

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 ...
4
votes
1answer
1k views

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 ...
2
votes
2answers
119 views

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 ...
1
vote
1answer
26 views

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 ...
1
vote
3answers
209 views

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 ...
1
vote
3answers
84 views

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 ...
1
vote
2answers
38 views

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 ...
1
vote
0answers
21 views

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 ...
1
vote
0answers
61 views

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 (...
0
votes
2answers
112 views

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 ...
0
votes
1answer
37 views

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 ...
0
votes
1answer
70 views

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 ...
0
votes
1answer
58 views

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 ...
0
votes
4answers
1k views

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 ...
0
votes
1answer
653 views

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 ...