6.07.2015

ROLL BLUE

This is final edited version of 2015 open house, IDAS.





open house setting_002









open house setting_001

 




mapping test_021


In maya, I animated rotating plate into 2 section. From 0 to 100, stay still. From 101 to 900 rotate from 4 degree to 3364 degree, which is right speed for 4 in mapamok.


Realflow simulation with physics: centrifugal force, gravity, velocity, and coriolis' force

In photoshop, try to match the position by using guides



mapping test on the plate.







arduino code

This is a simple arduino code for rotating the plate. From easy driver sample code, I extract step and dir part to start rotating. Also, I use steps and usDelay parts from mapamok. However, I had to play with delay part and mostly usDelay part to sink properly with rotating plate with speed 4.


int x;
float rotation = 0.0;

void setup()
{
  pinMode(6,OUTPUT); // Enable
  pinMode(5,OUTPUT); // Step
  pinMode(4,OUTPUT); // Dir
  digitalWrite(6,LOW); // Set Enable low
  //Serial.begin(9600);
}

void loop()
{
  float deg = 0.51;
  int steps = abs(deg)*(1.0/0.225);
  float usDelay = (1.0/4.0)*125;
//113
//150 movie fast
//100 rol fast
//120 movie little fast
//110 roll fast

digitalWrite(4,HIGH); // Set Dir high

for(x = 0; x < steps; x++)
{
  digitalWrite(5,HIGH);
  delayMicroseconds(usDelay);
  digitalWrite(5,LOW);
  delayMicroseconds(usDelay);
}
  delay(7);
}





mapping station_004/005

This is my 004 mapping station with different design for bigger rotating plate, 500mm. But the problem is stepper motor torque, rotating capability, with higher weight. I wanted to test out the torque. In market, this NEMA 17 has 260mN.m of holding torque and 12mN.m of detent torque. The weight of 160mm rotating plate was about 980g. Assuming that density of this acrylic is uniform, I calculated maximum 500mm would be fine to rotate. 






It turned out that 500mm rotating plate with NEMA 17 did not work. It seems to rotate but it worked at first few second and stop due to weight of the plate. Therefore, for safety and material cost, I dealt with 300mm rotating plate which was fine for rotating.





This is the behind the scene of the rotating plate.



























mapping station_003

From 002, I changed rotating plate. I made four holes to make rotating more dynamic in real flow. Without the hole, the liquid seems plain and dull. Because of the holes, the liquid starts to distract or scatter as it rotates.