Originally Posted by martin_
Ya, I had seen your post about the accoustic test.
In fact my motor is an Hyperion 4035-500 12n10p, same as the HKIII.
I have the SK-720 with vibration logger, I will make a quick test running the motor only to see if vib have increased, I changed the main shaft too for a longer one.
I see, hyperion motor is nearly identical to scorpion ^^. My original scorpion 40xx, both 4035 and 3 4025, all have perfect test run with no vibration felt with bare hand. I rewinded all except one of the 4035, and only the 4035 gives greater vibration during the test run after a rewind and shaft , bearing replacement. So i must have screwed up something, and i am still trying to figure out the problem. Also i am having a hard time to rebalance the 4035
Does the SK-720 help to rebalance the bell (to determine where to add or cut weight on the bell) or it can only be used to test vibration level?