Hello All,
This is not a PLC question. I deeply apologize for that but I am looking for help from great members like DickDV and others. I am new to this forum.
I work in a plant where we have winders and un-winders machinery. Each of those are built with ABB ASC800 drive powering 1 HP, 1725 RPM motor connected to 60:1 reducer. The drives are set in Torque Control macro and DTC function is activated. We run in torque control mode most of the time but sometimes we run in speed control mode. There is a switch connected between point X22.3 and X22.7 (I am assuming you can get a copy of ASC800 wiring diagram). If the switch, on in run on torque mode and if its off, it will run on speed control mode.
The problem we are having and its only on torque mode: at some points when the load speed gets too low (load speed gets too low when the material diameter gets larger) (load speed will be around 3 RPM at load side of the reducer and around 180 RPM at the motor side) the load will start to jerk. By that I mean it will not run smooth like when it faster. The reel will stop for less than a second and fast up again.
We have plenty of those winders and un-winders but we have the problem only on few of them. All of them were built using same exact mechanical parts and the drives were set the same way. Any advice? I would appreciate any help and reply.
Thank you
This is not a PLC question. I deeply apologize for that but I am looking for help from great members like DickDV and others. I am new to this forum.
I work in a plant where we have winders and un-winders machinery. Each of those are built with ABB ASC800 drive powering 1 HP, 1725 RPM motor connected to 60:1 reducer. The drives are set in Torque Control macro and DTC function is activated. We run in torque control mode most of the time but sometimes we run in speed control mode. There is a switch connected between point X22.3 and X22.7 (I am assuming you can get a copy of ASC800 wiring diagram). If the switch, on in run on torque mode and if its off, it will run on speed control mode.
The problem we are having and its only on torque mode: at some points when the load speed gets too low (load speed gets too low when the material diameter gets larger) (load speed will be around 3 RPM at load side of the reducer and around 180 RPM at the motor side) the load will start to jerk. By that I mean it will not run smooth like when it faster. The reel will stop for less than a second and fast up again.
We have plenty of those winders and un-winders but we have the problem only on few of them. All of them were built using same exact mechanical parts and the drives were set the same way. Any advice? I would appreciate any help and reply.
Thank you