I have been running the ardumower for 2 years. This year I have big problems with interference of the perimeter coil. If the mower motors mowing without discs, the interference is zero. After installing the cutting discs, the interference increases so that the ardumower is not able to detect the perimeter. I installed coil and capacitors, nothing helped. Problem occur this year after 2 years of success mowing. Distance between coil and motors is about 17cm.