text: <s>[INST] Two drives driving the same axe I have an application with a drum driven by two wheels. each wheel has a motor and each motor an independent PF700 drive. drives are communicating via devicenet.Problem is that speed is initialy set at same setpoint. One wheel is always going a bit faster than the other what causes one drive has an actual speed that is greater than the speed setpoint. This causes the drive to decelerate and that causes a high DC Bus voltage. Finally the drive trips. at this point i decreased the setpoint of the drive which is at setpoint. One drive has now an output setpoint 1.25 hz lower than the other one and both are now at setpoint. When in the future a wheel/motor is replaced the problem will be there again.Does anybody knows a structural solution? [/INST] can u send me the pictorial representation of the drum and drives mounted?as such i think it is a load sharing application.if it is so then u got to set droop in one the drive which is going faster that is parameter 152 as per your application.hope it helps. \\n </s>