IRC calibration is a procedure for setting up an RDS articulating carrier.  It teaches the CMM what electronic signal corresponds to each physical angular position of the RDS.  So it goes through every A/B angle in sequence and then saves the information to a file on the C99 controller computer.

We also use this procedure to troubleshoot if the RDS has trouble rotating to and locking into position.  This kind of problem causes the RDS to “wiggle” back and forth as it tries to find the target position to lock in.  If it is unable to reach the target angle after a set time limit it will throw a 395 error.

You get this problem with normal wear/tear over time and it can be exacerbated by collisions.  If the IRC calibration doesn’t solve the problem our only solution is to replace the RDS.

An IRC Calibration can be done remotely and takes about an hour.