geofftheelectrician
Lifetime Supporting Member
I have an issue with an elevator being driven by a 525 where when the second shelf (of 8 tiers) gets loaded on to the conveyor the drive over speeds and then the decel command to reduce speed (commanded by prox on cam switch) seems to have no effect. Monitoring B001 on the drive as the machine is cycling the command freq of 50 hz over speeds to 62+ hz and never seems to get to the slow speed of 10 hz for positioning and overshoots. I’ve advanced the cam timing for the slow, lengthened and shortened the decel time and nothing seems to successfully stop it in the right position.
The only thing that has worked is reducing my speed to 30 hz and I finally get the carriers to stop in the right position when the second shelf is being carried by the chain. 2 concerns remain, I might not be able to make rate Monday morning when we start loading product in to the machine and I am not sure how it will react with 2000 +/- kg of product on the shelf unit (x2) when fully loaded.
Thoughts? Thanks in advance.
The only thing that has worked is reducing my speed to 30 hz and I finally get the carriers to stop in the right position when the second shelf is being carried by the chain. 2 concerns remain, I might not be able to make rate Monday morning when we start loading product in to the machine and I am not sure how it will react with 2000 +/- kg of product on the shelf unit (x2) when fully loaded.
Thoughts? Thanks in advance.