our 15MW motor has higher vibration(pk-pk) on DE - x - 20µm and y - 35µm at 1400rpm. we have seen it running beffore over years @ x 10 and y 10µm.
Absolutely no vibration change on the gearbox side - coupling is a lamiflex coupling.
so we checked the alignment - per laser and with 4x dial gauges to double check - and we saw that the motor is vertical 0,3mm deeper than the gearbox and horizontal 0,1 mm out of range. Initially the motor was calculated and hopefully alingned to be 0,3mm higher than the gearbox and 0,0 at horizontal
we will realign it anyways but i wanted to know based on your experience - how much influence will/can have this missalignment on the vibrations?
thanks in advance