We have a project including unwinder-rewinder process. We control motors via torque mode. Me and my collegue have different opinion about a thing.
Let's think line is going with fixed speed and tension. When we increase tension(increase torque command sent to drive),
My opinion is that before increasing torque, the rewinder motor was going with fixed speed in balanced way. As soon as we increase torque (to increase tension) this balance is broken and a positive torque is created. This positive torque makes motor speed up and this increase in speed causes tension to increase. Then motor finds a new balance point which is at higher speed and higher tension.
But my collegue doesn't agree with me and says as soon as we increase tension , torque increases immediately(independently from speed of winder) and this will cause tension to increase without making any change in speed. But it doesn't seem logical to me. For me, to create this additional tension rewinder speed should increase more or less. (The material is aluminium)
Is there anyone experience this situation or having opinion about this ?
Thanks in advance.
Let's think line is going with fixed speed and tension. When we increase tension(increase torque command sent to drive),
My opinion is that before increasing torque, the rewinder motor was going with fixed speed in balanced way. As soon as we increase torque (to increase tension) this balance is broken and a positive torque is created. This positive torque makes motor speed up and this increase in speed causes tension to increase. Then motor finds a new balance point which is at higher speed and higher tension.
But my collegue doesn't agree with me and says as soon as we increase tension , torque increases immediately(independently from speed of winder) and this will cause tension to increase without making any change in speed. But it doesn't seem logical to me. For me, to create this additional tension rewinder speed should increase more or less. (The material is aluminium)
Is there anyone experience this situation or having opinion about this ?
Thanks in advance.
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