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Type: Posts; User: Farmer Machine

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  1. Replies
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    Okuma RU1 board relays

    My LB15 won't unclamp the chuck. We have it narrowed down to the RU1 board. Can somebody please tell me which relays on the RU1 board need to be replaced when the board fails? Any help will be...
  2. Okuma LB15 keeps blowing power supplies

    About three weeks ago, the control wouldn't start. I replaced the cpu power supply and it fixed it. Today, I turned on the main power and I heard a pop and crackle noise. Then, without thinking I...
  3. I finally started having enough trouble with this...

    I finally started having enough trouble with this thing to tear into it. I pulled the spindle motor so I could get to the encoder and connections. I cleaned the encoder and set the gap and...
  4. Well, it's running. I soldered in a new...

    Well, it's running. I soldered in a new capacitor and a used diode from another board and soldered a jumper from the cap to the diode on the back side of the board. By the way the capacitors I...
  5. I think I may have found the problem. If you're...

    I think I may have found the problem. If you're looking at the board as it hangs on the drive there's a heat sink at the top right hand corner. Just to the left of the heat sink is a 35v 120uf...
  6. Replies
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    If it is led m2 along with the number 2 green led...

    If it is led m2 along with the number 2 green led on, that's a spindle motor overload on some of the VAC drives.
  7. Apparently, these drives are obsolete. The...

    Apparently, these drives are obsolete. The replacement is a Vac 5 D8 from Okuma at a cost of $13,518! Ridiculous. This will probably be the last Okuma that I'll ever own. I guess I'll have to...
  8. I swapped the base unit with a known good one and...

    I swapped the base unit with a known good one and it made no difference. That leads me to believe the problem is in the top board. The board is a e4809-045-084g. The drive is a VAC type A D8-A. ...
  9. The fan is clean and working. The cooling fins...

    The fan is clean and working. The cooling fins are also clean. When you say it may be too late, what do you mean? What components on the base unit or heat sink could be damaged to cause this...
  10. Thanks for your reply Old Timer. The leds that...

    Thanks for your reply Old Timer. The leds that are lit are: power, m2, 1, and 2.
  11. Thanks for the advice. I'll check those. I've...

    Thanks for the advice. I'll check those. I've had those go bad on a Fanuc drive before.
  12. Okuma VAC type A spindle drive problems

    I have a 1991 Okuma lb15 with a 5020l control. For the last several weeks I have been getting a 110 A SDU Alarm. Sometimes the machine would run for 4 hours, sometimes for 30 minutes, or sometimes...
  13. bridgeport interact 1 mk2 supply voltage

    I just bought a bridgeport interact 1 mk2 mill with a heidenhain tnc 2500 control. I didn't receive any manuals or schematics with it. According to the seller it is set up to run on 460 vac. I...
  14. mori seiki cl 20 spindle runs erratic in reverse

    I have a 1996 Mori Seiki cl 20 with a MSC 521/fanuc 21 tb control. The spindle tries to run in reverse but its movement is really erratic. It will run at speeds under 100 rpm, but the load meter...
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