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  1. #1
    I have small CNC lathe which has been retrofitted with a heavier 3ph. motor, due to the the old one being no longer available.
    I have lost the spindle synchronisation in the process. It is running on Mach3. Would anyone know how to go about restoring the facility please. Most grateful for any guidance.

  2. #2
    Chaz's Avatar
    Lives in Ickenham, West London, United Kingdom. Last Activity: 3 Weeks Ago Has been a member for 9-10 years. Has a total post count of 1,600. Received thanks 110 times, giving thanks to others 69 times.
    How does it synchronised? Are you talking for a speed / tacho feature or something more accurate to determine angular location?

  3. #3
    Should have been more clear. The spindle speed encoder is working fine. But for screwcutting the consistent return for each pass is not there. So does not pick up in the same place.

  4. #4
    Chaz's Avatar
    Lives in Ickenham, West London, United Kingdom. Last Activity: 3 Weeks Ago Has been a member for 9-10 years. Has a total post count of 1,600. Received thanks 110 times, giving thanks to others 69 times.
    Quote Originally Posted by Leadhead View Post
    Should have been more clear. The spindle speed encoder is working fine. But for screwcutting the consistent return for each pass is not there. So does not pick up in the same place.
    Sounds like the index pulse is missing or not being read.

  5. #5
    Chaz - Yes the guy who did the motor conversion said it would not be possible with this setup. I wanted to understand if I could retrofit a second encoder to get it to register a repeatable position.

  6. #6
    Chaz's Avatar
    Lives in Ickenham, West London, United Kingdom. Last Activity: 3 Weeks Ago Has been a member for 9-10 years. Has a total post count of 1,600. Received thanks 110 times, giving thanks to others 69 times.
    Quote Originally Posted by Leadhead View Post
    Chaz - Yes the guy who did the motor conversion said it would not be possible with this setup. I wanted to understand if I could retrofit a second encoder to get it to register a repeatable position.
    Probably best to just get a new encoder. Any pics of the setup?

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