Mazak T plus PLC Signal Screen. What is SP?
Close
Login to Your Account
Results 1 to 2 of 2
  1. #1
    Join Date
    Feb 2006
    Location
    Northern LP of Michigan
    Posts
    681
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    3

    Default Mazak T plus PLC Signal Screen. What is SP?

    I've spent way too much time on this machine but I learned a lot. It is an older multiplex with a M5xx control. After replacing the spindle drive I thought I was home free. Head one runs fine. Head two homes, jogs, spindle spins. You press cycle start with a part in the chuck, nothing happens. No alarms nothing. Acts like an angry wife. Yes the cycle start button is working along with the feed hold button on the panel.

    Just before I left for the day I went to the PLC Signals screen and flipped from HD1 to HD2. SP is 1 or 0 depending on which head the switch is on. What is SP?

    Thank you,

    Clutch
    Last edited by clutch; 08-02-2019 at 03:51 PM.

  2. #2
    Join Date
    Feb 2006
    Location
    Northern LP of Michigan
    Posts
    681
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    3

    Default

    Replying to my own post.

    SP seems to mean Start Pause, AKA Feed Hold.

    I dug though the ladder and found an input missing. All the feed hold signals are NC so the absence of a signal will put the head 2 into feed hold. Seems logical. This machine once had a light curtain on the right side door that was part of a loading or unloading system.

    Machine is running fine now. :t

  3. Likes sudsy55, cnctoolcat, Philabuster liked this post

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •