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Thread: Blohm Profimat with Allen Bradley 9/240 Control

  1. #1
    JSaindon Guest

    Default Blohm Profimat with Allen Bradley 9/240 Control

    This machine likes to hang up on its dressing cycle with coolant still on. The grinding wheel comes down to dress on the diamond roll, then when it is finished with its dress and the wheel raises, that is where the machine just locks up with no alarms or anything indicating an error. I am not familiar with this old A-B control and am thinking it is in the programming somewhere. Since I removed a paramacro call of G65P994, the program no longer hangs up. All P994 does is move the table to the loading position so the we can load another part.

    This is the main program with description of lines:

    #500=58 (position of the pocket)
    G65P9302C2D0F12I1.2J.250K1.2R2.0S105U0X0Y-.225Z.000 (Cuts the Part)
    G65P901A90D.002E07M0R2S70U1V1 (Dresses the Wheel)
    M9 (Coolant Off - this seems redundant since its in P901)
    G65P994 (Return to load Position)
    M30 (End)


    Here is P901, the line on the display that it seems to hang on is IF[#1000NE0]GOTO99

    (PEA-T ROLL DRESS.)
    (O00901 11-MAR-94)
    M75
    S#19M3
    #5321=0,#5322=0,#5323=0
    G52X0Y0Z0
    M32M34
    #2101=#5508/2,#27=#[2000+#520],#28=#20,#29=0
    IF[#18EQ2]GOTO3
    #27=0,#29=#[2000+#520]
    IF[#21EQ2]GOTO3
    #28=1/#540
    N3IF[#22EQ0]GOTO4
    M35
    N4IF[#21EQ2]GOTO5
    M71
    N5G1G19G59G90Y#547T1F0
    T[#520+1]
    G52Y[#2101+#[2100+#520]]Z[ABS[#2201]*#549]
    XZM8
    Y#28F0
    Y[#28-#27]F#8
    G91Y[-#28-#29-#7]F[#1/#541*#1034]
    G4P[60*#13/#1034]
    G52X0Y0Z0
    G1G90Y#547T1F0
    IF[#1000NE0]GOTO99
    #5508=#5508-2*#7
    #2101=#5508/2,#1133=#5508*#540*1000
    M88
    IF[#506LE0]GOTO99
    #30=#07*TAN[#508],#2201=-[ABS[#2201]-#30]*#549
    #5509=#5509-#30-#07*TAN[#509],#507=#507-#07
    N99G90M75M9
    M99


    And here is P994, the machine never hung up yet after I removed the G65:

    O00994(TO LOADING POSITION)
    (25-NOV-1993)
    #2101=#5508/2
    #5321=0,#5322=0,#5323=0
    T1
    G1G59G61G90Y#545F0
    M09M79T0
    X#544Z#546
    M99





    I have been researching this for a while and reading all of the manuals for this control with no luck of an answer. The biggest thing is that there is no alarm, the program just halts and the machine just sits there. If anyone is familiar with this control and knows anything about my problem, I would be grateful if you shared some insight.

  2. #2
    JSaindon Guest

    Default

    I should also add that the machine still returns to its loading position with G65 taken out. I left P994 there but don't think the control will acknowledge it and call the sub program anyway. Not a big G coder, I just do electromechanical maintenance, so any advice with the G code if there are problems would be beneficial.

  3. #3
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    Default

    I haven't touched a AB control since I worked at Norton/TRW Ceramics ('87 thru '91). That's the control supplied with the Blohm creep-feed grinder they bought, and RETURNED IT because it's control was so frequently hung up and we couldn't get support in with any sense of urgency.

    That said....

    I don't see any reference to that variable (#1000) anywhere else in the program, so it's value probably isn't zero, or any other number...as in....blank.

    Set it to zero with "#1000=0" or "#1000=1" and see if things move along.

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