PLC Pie Guy
Member
Hey all.
I have been troubled by an issue for some time and I thought I would ask here for general advice or somebody who might say its happened to them before.
We purchased an oven un-loader for our new plant. It has a gantry that moves back and fourth being pushed by a 2 Hp motor and a 525 drive. On the end of the motor is an incremental encoder. (SEW Euro Drive)
Over the past few weeks we have been getting f91 - encoder loss. I usually am able to reset the fault and keep running. Might see it once or twice a day. During downtime I have been going over everything looking for a loose wire or something that causes this. I have done the shielding on both ends of the encoder cable. This morning I have actually replaced the encoder cable and the termination cap. The final thing I did was to swap the encoder card from the drive in question to make sure the fault did not follow the card.
I am now simply left with the encoder itself. Do these things intermittently fail? I have never had one go bad on me yet.
One question I have is about the dip switch on the drives encoder card. It has a selection of 5V or 12V. Currently set to 5V. I would think this better at 12V. Any comments on this situation?
Thanks All
I have been troubled by an issue for some time and I thought I would ask here for general advice or somebody who might say its happened to them before.
We purchased an oven un-loader for our new plant. It has a gantry that moves back and fourth being pushed by a 2 Hp motor and a 525 drive. On the end of the motor is an incremental encoder. (SEW Euro Drive)
Over the past few weeks we have been getting f91 - encoder loss. I usually am able to reset the fault and keep running. Might see it once or twice a day. During downtime I have been going over everything looking for a loose wire or something that causes this. I have done the shielding on both ends of the encoder cable. This morning I have actually replaced the encoder cable and the termination cap. The final thing I did was to swap the encoder card from the drive in question to make sure the fault did not follow the card.
I am now simply left with the encoder itself. Do these things intermittently fail? I have never had one go bad on me yet.
One question I have is about the dip switch on the drives encoder card. It has a selection of 5V or 12V. Currently set to 5V. I would think this better at 12V. Any comments on this situation?
Thanks All