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  1. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    I am running G49 at the top of all my programs. Is that a good idea?
  2. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    I left it out of the last program I ran.
  3. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Maybe it was some setting leftover from another program that got reset today? I didn't change any parameters, etc. that I'm aware of. If I wasn't missing hair already, I'd be pulling some out now. I guess I'll go ahead and run some tools with a positive offset and see what happens.
  4. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Hmmmm. Appears I spoke too soon. I can't get my machine to move down on G28 at all. :nutter:
  5. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Well, what do you know. That program worked perfect. No downward movement on G28 even with my tool length offset of 1.0". I wasn't sure what to make of it, then it dawned on me that my G28 blocks were in a different order. Mine: G91 G28 Z0 dandrummerman21: G28 G91 G00 Z0 I skipped the G00 but...
  6. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    That's my fault. I should have posted the original program first. It did not have the G49. I will run your program tomorrow and see what happens.
  7. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Could this be part of the problem? Parameter 24.6 CLCL 1: The local coordinate system is canceled by automatic reference point return. 0: Not canceled. On my machine this bit is 0.
  8. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    I don't know if this is related but, if I run the above program and stop in the middle (Feed Hold, Reset) and run the program again, the tool will move DOWN 1.0", then rapid up to home for the tool change (G91 G28 Z0). This is even after the preamble block containing a G49. I saw something in...
  9. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Thanks for the suggestion, but I seem to only have 3139 jumping to 6140. No 5000 parameters.
  10. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Ok. Edited the above program so the last few blocks were: M05; G90 G53 Z0; G91 G28 X0 Y0; G17 G54 G90 G80 G40; M30; Works well. No downward movement even with length offset at 1.0". I looked in my manual for the parameter to set G49 behavior. I must have missed it. I'll have another look...
  11. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    When I first saw this problem the program did not have G49 before the G28 Block. Your right. It is a bit different. Actually, I see the exact same stuff happening using G43 to call an offset. Calling a negative offset just after a tool change would send the Z UP and over travel. Issuing a rapid...
  12. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Ok. Ran a test program with a tool length offset of 1.0". % O0013 (Tool Offset Cancel Test) (BEGIN PREAMBLE) G17 G54 G40 G49 G80 G90 G20 (MACHINE UNITS: IN/MIN) G54 (7-32IN_ENDMILL_3FLU001) M5 (TOOL CHANGE) G91 G28 Z0 G90 M6 T7 G00 G43 H7 Z3.6900 M3 S3000 (BEGIN OPERATION: PROFILE) X1.5799...
  13. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    I thought G28 cancelled the offset. Maybe I missed something? No, just cutting with the tool, rapid up a little and calling G91 G28... At any rate, I will give that a try. Its when running a program. I will check parameter 3 this afternoon. Thanks for the replies!
  14. S

    Z-Axis Moving Wrong Way While Running G28, Leadwell VMC with Fanuc OM

    Hi All, I have looked and looked for a thread discussing this. If you know of one I'd be glad to read it. Machine: Leadwell MCV-OP Type: VMC, 3-Axis Year: 1996 Control: Fanuc OM-F I have been running this old machining center for about a month now and noticed something scary. If I use a...
  15. S

    Relay Signal Tracing on a Leadwell MCV-OP Machining Center

    I got the tool changer to work! A new Fanuc I/O board did the trick. 45 minutes of work and I was changing tools. There may be a couple LEDs that still need to be replaced to get all the relays working, but the kluged relay board seems to work ok. Thanks everyone for your help. If the...
  16. S

    Relay Signal Tracing on a Leadwell MCV-OP Machining Center

    Haha. It really is a mess. And the idea was to MAKE money with this thing. Maybe someday it will. If I can't get the tool changer working, I guess I'll just hand load tools and get on with life... I see what your boos meant about high voltage on the relay board. There is 12V, 24V, 120V, and...
  17. S

    Relay Signal Tracing on a Leadwell MCV-OP Machining Center

    @dandrummerman21: The relay board is a Leadwell -P100. I guess I could give COMPAT a call. Couldn't hurt. I got around to replacing some LEDs. Once done, I could make every relay click that I replaced an LED for. Even got the carousel to move over by firing relay 16 with 24v. Still can't get...
  18. S

    Relay Signal Tracing on a Leadwell MCV-OP Machining Center

    Question: Would there be a way to tell if the Fanuc I/O board is sending signals at 24v or if it's the type that grounds an exturnal 24v? My relay board had a trace blow like I said, so perhaps whoever fixed it had to replace the I/O board as well, opting for a different type? At any rate, the...
  19. S

    Relay Signal Tracing on a Leadwell MCV-OP Machining Center

    @dandrummerman21: You are right. That is the M19 connector unplugged. I had it unplugged to isolate the control I/O board while testing with my 24v. Next time I'm there, I'll get a photo of the back of the relay board. That's where all the jumpers are. One of them connects the traces from the...
  20. S

    Relay Signal Tracing on a Leadwell MCV-OP Machining Center

    @Vancbiker: Thank you! That makes me feel a lot better. I was beginning to think whoever repaired the board last messed things up bad and I'd have to rewire the whole thing.

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