Double Folder

The SonicTrac board gets the signal from sonar device measuring the distance from the device to the surface of the roll.  The various pots, gain, bias and offset are used to translate the signal into a voltage output.

The voltage output from the SonicTrac goes to the multiplier divider board Input A and becomes the denominator in a formula used to calculate output voltage of the m/d board.  A roll that is 2x the diameter of the core needs to be wound at 1/2 the speed of the core since pi x diameter = circumference.  If the core is 2" the circumference is 2xpi=6.28".  If the core is 4", the circumference is 4xpi=12.56".  So if a roll is 2x the core diameter, the voltage needs to be 2x the core voltage.

Input B is the line speed. It is controlled by the operator foot pedal. Whatever it is, is divided by Input A, the voltage corresponding to the diameter of the roll. If the line speed input is 10 volts and the roll just has the core (voltage=1), then the 10/1 is the ratioed speed. If the roll grows to 2x the core then 10/2 is the ratioed speed.

Set the Sonictrac to supply 1 volt at core and ________ at max roll size.

Input B can't be more than 1 so since it is using the boards own 15 volt supply, it has to be multiplied by .01 for .15.  Set range to 100 volt.

Input A needs to be 1 volt at core and whatever the diameter of the max size roll divided by the core at max rolls size. Set to 1 volt at core and ________ at max roll size.  Use 10 volt max for input A and 1x for the multiplier.

Calibrate Input A per instructions to give 1 volt at core and _______ at max roll size. 

Calibrate Input B per instructions to  give.

Calibrate the output to give 5 volts maximum.