I have a dual drive conveyor that is starting to puzzle me. One side has always had a bit of a resonance, but lately, when the belt is unloaded and first staring up I'm starting to get a pretty violent shudder on the motor and platform. There is one Vibe sensor on the input of the gearbox that shuts the system down at .6 In/Sec.
The vibe sensor has been tripping during start ups. Haven't seen any drastic difference in line frequencies to the motors during these occurrences. The shudder settles out after about 30 seconds or so. Peak amplitude has gotten up to 1.6 In/Sec. Right now, the vibe sensor is jumped during start up an then put back online within a minute of the belt being fully loaded. There are no bearing fault frequencies on the motor or gearbox.
Could the fluid coupling be going bad...slipping? Oil was checked at the proper angle and both were found to be filled to proper level.
Any thoughts would be greatly appreciated.