From the measured volts caused abrasion found to have positive ions and negative. When the rollers move up and down.Using a speed normal speed the machine work.
The measure volts caused by attrition that occurs with the positive and negative ions. When the rollers move up and down at a speed which is normally used at work.
Measuring the volt caused by abrasion has found that charge was positively and negatively. When the roller moves up and down.The speed used a normal speed machinery work.