Arduino•5mo ago

Save & Play Arm “Animation”

I’m making an arm controlled by potentiometers and servos. An idea of mine is that a button will be made for recording a series of potentiometer inputs which can then later be played with another button. My questions are: A. How this would even work B. Does the Arduino Uno even have enough storage for that

12 Replies

sfloonOP•5mo ago

i was thinking of just adding every millisecond or whatever to a table but that seems inefficient

AnonEngineering•5mo ago

You could experiment with how often you need to save the position so that playback is " good enough", maybe you need every ms, maybe you only need every 100 ms...

DarwinWasWrong•5mo ago

You do not need to store time. Store changes and the time they happen. wrist --- 90 @ 2100 elbow -- 30 @ 2200 wrist -- 80 @ 2200 eg doesnt need to be continous

sfloonOP•5mo ago

the reason i thought about storing time was because if there is a pause in the animation for whatever reason, it could be recorded

DarwinWasWrong•5mo ago

That is done via the stored this happens then Much like animation key fram. Eg Time, wrist pos, elbow pos, shoulder pos.

100  , 59, 59, 50
300  ,  9 , 59, 50
700   , 39, 20, 20

100  , 59, 59, 50
300  ,  9 , 59, 50
700   , 39, 20, 20

Between 100 and 300 the values remain the same, then @ 300 elbow moves.

Unknown User•5mo ago

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DarwinWasWrong•5mo ago

Over complicated as you can do that with the interpreting what amount of change determines a record

sfloonOP•5mo ago

would i need two separate arrays for that?

DarwinWasWrong•5mo ago

you can create a struct

typedef struct move_record {
  uint64_t time_stamp;
  uint8_t  shoulder_rotate_move;
  uint8_t  elbow_rotate_move;
  uint8_t  wrist_rotate_move;
  uint8_t  wrist_bend_move;
}
move_records;

typedef struct move_record {
  uint64_t time_stamp;
  uint8_t  shoulder_rotate_move;
  uint8_t  elbow_rotate_move;
  uint8_t  wrist_rotate_move;
  uint8_t  wrist_bend_move;
}
move_records;

then

move_records moving_records[1000];

move_records moving_records[1000];

What is the project ? an arm ? And questions. do you record the positioning as continuous moves or move to a position in a fixed times and push a button to record.

DarwinWasWrong•5mo ago

Also look at this https://github.com/ArminJo/ServoEasing/tree/master/examples/RobotArmControl

GitHub

ServoEasing/examples/RobotArmControl at master · ArminJo/ServoEasing

Arduino library to enable smooth servo movement. Contribute to ArminJo/ServoEasing development by creating an account on GitHub.

DarwinWasWrong•5mo ago

https://github.com/ArminJo/ServoEasing/tree/master

GitHub

GitHub - ArminJo/ServoEasing: Arduino library to enable smooth serv...

Arduino library to enable smooth servo movement. Contribute to ArminJo/ServoEasing development by creating an account on GitHub.

sfloonOP•5mo ago

thanks!

Gaming

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Save & Play Arm “Animation”

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