Brent Edsoren Jr.
Hi, I have a system with 3 dc motors 1 connected at each end of a conveyor and one in the middle. The conveyor has a chain inside a track to drive the conveyor . The conveyor has allot of variable load upsets that have been plotted with a special device made to measure tension forces in various parts of the chain. The drives control the motors in torque mode and the drives are setup to gear 1 to 1 with another device. I have tried to tune the drives, have also put the (A/B 1395)drives in velocity mode, changed encoders all with no success. There is a tension take-up on the system but there are still variable tension upsets through the system. Is there anything you could suggest to help me with this control scheme that I might be able to use to stabilize my system? The reason for torque mode is there is a Sam-ex single axis control card that looks at the device encoder and the conveyor encoder to gear 1 to 1. There is another proprietary board which controls positioning. Torque needs to be used for fast positioning reaction, but even in velocity mode the system still surges. The driv commands are pretty staedy but the drives are still fighting each other.