Hi guys. My shop was flooded few months ago with 20 inches of water. Spindle motors and a lot of electronics on my Okumas were under water. No flood insurance.
Short story , I have two machines that still not running.
On old Okuma Lathe LB15 (A06B-6044-H018 spindle drive A20B-1000-069 top board , A06B-1008-B902 spindle motor) I have an alarm 110 ALARM-A SDU 1.
On spindle drive it's Alarm 2 (Excessive speed deviation). I get those alarms when I try to run spindle. It makes about 1 revolution and it stops resulting in alarm. No alarm when rotating slowly with JOG button on control. In first repair place they changed bearings and baked motor for 1000$. After instalation on machine having those alarms I gave it second repair place. They said that speed sensor needs to be replaced. After 2 months they couldn't get the replacement part I took it to third repair facility wher they had all parts available. They checked the motor and surprisingly they said it runs perfectly. I took it back and connected all wires to machine without installing it on machine for testing. Still get alarms. An attached pictures you can see it.
My questions are:
-Does a motor has to be installed on machine (run spindle and opticoder) in order to test it ? Or can it be like on the picture?
-When they tested motor in third place they had cables X, Y, Z bolted (connected)together. Why did they do it? If I try to run like that what will happen?
- Any idea what could be wrong?
Thank you for any suggestions.