Hello, i am having a similar issue with an older garvens hi-speed unit. unfortunately tech support for this equipment has ceased to be, so i am taking to the forums to try and find help with my problem.
In this instance, i have two machines, one incomplete as a parts pile. one of the load cells is in very good shape for being a 1990 model year.
when i static tare the scale it zero's perfectly and with a 100g cal. weight it reads 100g.
now the issue im having is when i start the belts, i will get anywhere from 3.0-25.0g with nothing on the scale at all. my conclusion is that vibration is causing this issue, but to find an adjustment to compensate for this has proven nearly impossible. i've located 2 slide pot adj. on the main circuit board, and one close to the back of the baord as well, i am not sure of there reason but adjusting them while running the belts and scale has resolved nothing.
Any help is appriciated. thanks