Recent content by AY156

That is not always. Some signals show voltage dropping to almost 0V as well. Also, I have repeated my DC voltage test on another rig that has a much better electrical setup done by the company that manufactures these rigs. I have attached the signals from both for comparison. The repeat test...

Thank you for the elaborate explanation. The mechanism is indeed similar to EDM, and is commonly observed in bearings on transmissions where currents are present. To understand the mechanism, this project uses a bearing steel ball (from an actual bearing). The 19.05mm ball is standard to be used...

Thank you for your help with this. 1. The ball diameter is 19.05 mm. But under the given test conditions, it forms a circular contact with the disc of radius approximately 104.334 microns. 2. Again, the disc diameter does not depend on the oil film. It is a ball on flat disc contact. 3. I have...

Thank you for the response. Yes, I am very much aware of wire EDM and same kind of discharge damage is widely studied in lubricated contact in context of electrical damage in rolling-element bearings. Part of my research is to compare the damage in bearing to that observed in EDM. In my setup...

I am a mechanical engineer researching electrical damage in lubricated contacts. In my tests, I apply 18V DC across a steel ball-disc contact with an elastohydrodynamic lubrication film (more simply an oil film between 600-900 nanometers in thickness) between the surfaces. This film, according...