Robert Sutton
  • Member for 8 years, 5 months
  • Last seen more than a week ago
Cheapest 3D printer for gears?
3 votes

I run a rep-rap (Mendel Max) 3d printer ~ $1500AUD (built from scratch). I can't really comment on the print quality of other printers, but my statements about materials will hold for other printers....

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Why my stepper motor doesn't move when I attach a blade?
2 votes

I will take a wild guess - your accellerating to fast for the mass of the blade / power of the stepper motor. You can check this by trying to step much slower - perhaps 1 step per second for testing

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Approach to using PID to get a differential robot driving straight
2 votes

I have a bot with 2 independently driven wheels. I chose to use a gyro to keep it heading in the desired direction, bumps slippage and even picking it up and turning it around are of little ...

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How To Do path planning To move the Robotic Arm in straight line in 3D where the arm is having base, Shoulder, Elbow & wrist?
1 votes

You need inverse kinematics. Which refers to calculating the joint angles so that the robot will reach a particular pose. You can not simply move from point A to point B.. You will need to use ...

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Laser Scanner for localization in particle filter
1 votes

As already stated, you can not do what you are asking. The task you need to do is score each particle's fit to the map given the incoming lidar scan. The approach i used is: for each particle do a ...

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Digital servo shaking
1 votes

The tutorial is using software pwm from java code. If the PI is otherwise busy or the jvm pauses for garbage collection, the pwm signals to the servo will be erratic. Which could be causing your ...

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Strategies for tuning with low sample rate
0 votes

I don't have full a solution for your problem, but I expect that this will improve performance... I'll suggest that you decrease speed as the Absolute value of the Error increases. something like... ...

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Stepper can't turn plastic wheel. Is it normal?
0 votes

If you try to step to fast it will fail to move. If you wish to move a large mass quickly you must accelerate the step rate gradually. Any time you accelerate to fast you should expect the stepper ...

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How to move a Stepper Motor to a desired angle with raspberry pi?
0 votes

You could add an angle sensor to the joint and make your stepper motor into servo. You could add limit switches to the joint, then at start up move the joint until the limit switch is reached and ...

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Why does the low variance resampling algorithm for particle filters work?
0 votes

The algorithm does seek to favour picking samples with a greater weight. If you think about the samples arranged in a line (actually a circle), and the length of each sample is proportional to it's ...

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are mg996r servo failures common?
0 votes

You must drive servos at 25hz or you'll fry them. I ran mine at 300hz until they melted internally.

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Gyro Yaw Drift Compensation With The Aid of Magnetomer
0 votes

A magnetometer in my experience is not a reliable source of heading. They are effected by local magnetic fields caused by large metal objects and electrical currents. Using it as a simple offset will ...

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question about car-like robot localization based on dead-reckoning
0 votes

I'm reasonably sure the answer to your original question using the steering angle, will involve some hefty calculus. Although I'd like to be proven wrong. I'd suggest putting encoders on the non ...

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