Heidenhain cycle 7 / general 5 axis programming
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  1. #1
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    Default Heidenhain cycle 7 / general 5 axis programming

    This is going to be specific to heidenhain/mastercam. But ill make it as general as possible for you fanuc people.

    When i first started programming 5 axis about a year ago the machine apps guy told me to change WCS and Tplane for each plane change, as long as i had the same fixture offset number everything worked fine with my post, and is actually a really easy way to program. in this situation my post took advantage of heidenhain's cycle 7. (if you're unfamiliar ill explain below).

    My post builder later told me this was incorrect, and that WCS should be left at "top" (which is how the rest of the world does it), in this situation, no cycle 7, but everything works just fine.

    Cycle 7 on heidenhain is a code that switches your coordinate system to wherever you're Tplane is built. So if you're drilling .500 deep holes in a 2" cube (you've probed the center and top of that cube as your work offset). The hole drilled on the top of the part with B at 0, your control will show a drill depth of -.500, tilt the table 90 degrees and your control will change coordinates to show a drill depth of z-.500, as opposed to z +.500 from the probed position. i find cycle 7 to be helpful for set up, as well as when my guys change tools, they can single block to make sure their tool is in approximately the right spot (z+.1 above top of part at 90 degrees, instead of z+3.925 or whatever)

    So when you guys are doing 5 axis work, at the control do you expect all your numbers to come from the probed position, or do you take advantage of plane shift type codes (not sure what fanuc calls it).

    Furthermore, what would then be the purpose of cycle 7? i see 4 different scenarios.

    1)one part, one work offset, all coordinates coming from probed position
    2)one part one work offset, all coordinated shifted to various faces/planes of part- cycle7
    3)two parts, two work ordinates, coordinates coming from each independent work offset
    4)two parts, one work offset, cycle 7 controlling coordinate shift for each part (only adjustable in CAM, and per my post builder, the correct way to use cycle 7, which to me seems pointless.



    cycle-7.jpg

  2. #2
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    In my setup things are done with PLANE AXIAL (rotates plane around) or M128 for some funky stuff.
    My system has not generated or used CYCL 7 for some time.

    I always work from 1 work offset (typically probed top and center)

    Which cycles are used has changed over the last 14 years with various controller updates and bugs.

    This is on an iTNC530.

    So I would expect you do probe once (there's one machine coordinate system so CYCL DEF 247 Q339=<something> only happens once.)
    In the CAM system, various planes may be set up as secondary working planes (in solidcam MAC1 (1-position) and MAC1 (2-position) - as example.

    The G-code for this kind of 3+2 stuff looks like:
    PLANE AXIAL B-90.0 C+0.0 STAY ; particular example I just coded up
    L B-90.000 F50000
    ....
    <machine the side of the part>

    ....
    I don't know anything about mastercam or its posts.

  3. #3
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    Quote Originally Posted by bryan_machine View Post
    In my setup things are done with PLANE AXIAL (rotates plane around) or M128 for some funky stuff.
    My system has not generated or used CYCL 7 for some time.

    I always work from 1 work offset (typically probed top and center)

    Which cycles are used has changed over the last 14 years with various controller updates and bugs.

    This is on an iTNC530.

    So I would expect you do probe once (there's one machine coordinate system so CYCL DEF 247 Q339=<something> only happens once.)
    In the CAM system, various planes may be set up as secondary working planes (in solidcam MAC1 (1-position) and MAC1 (2-position) - as example.

    The G-code for this kind of 3+2 stuff looks like:
    PLANE AXIAL B-90.0 C+0.0 STAY ; particular example I just coded up
    L B-90.000 F50000
    ....
    <machine the side of the part>

    ....
    I don't know anything about mastercam or its posts.

    Thanks for the reply, i suppose its less specific to mastercam post and more related to the code itself. see below. ive posted two sections of cude, one with cycle 7 and the other without. given that you dont use cycle 7, i think i know my answer, but ill ask anyway. in the code below ive removed a lot of the unimportant lines, this is just for discussion.


    -----------------------------------------------

    With cycle 7 -

    38 ; --- drill top hole ---
    39 PLANE RESET STAY
    40 CYCL DEF 7.0 DATUM SHIFT
    41 CYCL DEF 7.1 X0.0000
    42 CYCL DEF 7.2 Y0.0000
    43 CYCL DEF 7.3 Z0.0000

    44 PLANE SPATIAL SPA+0.000 SPB+0.000 SPC+0.000 STAY SEQ- TABLE ROT
    45 L M140 MB MAX
    46 L X+0.0000 Y+0.0000 F MAX M03
    47 L B+0.000 C+0.000 R0 F MAX M126
    48 L Z+2.0000 F MAX
    49 CYCL DEF 200 DRILLING ~
    Q200 = 0.1 ;Setup Clearance ~
    Q201 = -0.5 ;Total Depth ~
    Q206 = +876 ;Plunge Feedrate ~
    Q202 = 0.5 ;Plunge Depth ~
    Q210 = 0 ;Dwell at Top ~
    Q203 = 0 ;Surface Position ~
    Q204 = 2 ;Final Setup Clearance ~
    Q211 = 0 ;Dwell at Bottom

    /
    /
    /
    81 ; --- drill left hole ---
    81 PLANE RESET STAY
    82 CYCL DEF 7.0 DATUM SHIFT
    83 CYCL DEF 7.1 X1.0000
    84 CYCL DEF 7.2 Y0.0000
    85 CYCL DEF 7.3 Z-1.0000

    86 PLANE SPATIAL SPA+0.000 SPB+90.000 SPC+0.000 STAY SEQ+ TABLE ROT
    87 L M140 MB MAX
    88 L X+0.0000 Y+0.0000 F MAX M03
    89 L B+90.000 C+0.000 R0 F MAX M126
    90 L Z+2.0000 F MAX
    91 CYCL DEF 200 DRILLING ~
    Q200 = 0.1 ;Setup Clearance ~
    Q201 = -0.5 ;Total Depth ~
    Q206 = +876 ;Plunge Feedrate ~
    Q202 = 0.5 ;Plunge Depth ~
    Q210 = 0 ;Dwell at Top ~
    Q203 = 0 ;Surface Position ~ <--- note surface position at B90
    Q204 = 2 ;Final Setup Clearance ~
    Q211 = 0 ;Dwell at Bottom
    92 ;------ Start Cycle ------
    93 L X+0.0000 Y+0.0000 F MAX M99
    94 ;------ End Cycle ------
    95 ;Macro '3_PLUS_2_END_STANDARD' Selected.


    -------------------------------------------------------

    without cycle 7


    39 ; --- drill top hole ---
    40 PLANE RESET STAY
    41 CYCL DEF 7.0 DATUM SHIFT
    42 CYCL DEF 7.1 X0.0000
    43 CYCL DEF 7.2 Y0.0000
    44 CYCL DEF 7.3 Z0.0000

    45 PLANE SPATIAL SPA+0.000 SPB+0.000 SPC+0.000 STAY SEQ- TABLE ROT
    46 L M140 MB MAX
    47 L X+0.0000 Y+0.0000 F MAX M03
    48 L B+0.000 C+0.000 R0 F MAX M126
    49 L Z+2.0000 F MAX
    50 CYCL DEF 200 DRILLING ~
    Q200 = 0.1 ;Setup Clearance ~
    Q201 = -0.5 ;Total Depth ~
    Q206 = +876 ;Plunge Feedrate ~
    Q202 = 0.5 ;Plunge Depth ~
    Q210 = 0 ;Dwell at Top ~
    Q203 = 0 ;Surface Position ~
    Q204 = 2 ;Final Setup Clearance ~
    Q211 = 0 ;Dwell at Bottom
    51 ;------ Start Cycle ------
    52 L X+0.0000 Y+0.0000 F MAX M99
    53 ;------ End Cycle ------
    /
    /
    /
    81 ; --- drill left hole ---
    82 PLANE RESET STAY
    83 CYCL DEF 7.0 DATUM SHIFT
    84 CYCL DEF 7.1 X0.0000
    85 CYCL DEF 7.2 Y0.0000
    86 CYCL DEF 7.3 Z0.0000

    87 PLANE SPATIAL SPA+0.000 SPB+90.000 SPC+0.000 STAY SEQ+ TABLE ROT
    88 L M140 MB MAX
    89 L X+1.0000 Y+0.0000 F MAX M03
    90 L B+90.000 C+0.000 R0 F MAX M126
    91 L Z+3.0000 F MAX
    92 CYCL DEF 200 DRILLING ~
    Q200 = 0.1 ;Setup Clearance ~
    Q201 = -0.5 ;Total Depth ~
    Q206 = +876 ;Plunge Feedrate ~
    Q202 = 0.5 ;Plunge Depth ~
    Q210 = 0 ;Dwell at Top ~
    Q203 = 1 ;Surface Position ~ <--------surface position z + 1.0"
    Q204 = 2 ;Final Setup Clearance ~
    Q211 = 0 ;Dwell at Bottom
    93 ;------ Start Cycle ------
    94 L X+1.0000 Y+0.0000 F MAX M99
    95 ;------ End Cycle ------


    ---------

    heidenhain itnc530 shows programmed drill depth as either z-.500 from cycle 7 plane or z+.500 from probed position without cycle 7.

  4. #4
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    OK, surface position is in "Z" (at least for the tool) - and you have rotated the coodinate system around a point on the top. So the Z of the top face is 0, but the Z of the side face (left face in example below) is 0.5" (on a 1" cube.) If you set the WCS up to be in the middle of the stock (hard to probe that), then Q203 should be 1/2 cube dimension for both top and side.

    Here's similarly snipped for brevity code - but this is solidcam using a post that generates PLANE AXIAL. WCS is top center of the top face of the cube. 2nd hole is on the "left face" - so just a B-90 to get at it.

    5 CYCL DEF 247 DATUM SETTING ~
    6 Q339=+1 ;DATUM NUMBER

    16 TOOL CALL 1 Z S1000 ; DRILL
    17 M3
    19 PLANE AXIAL B+0.0000 C+0.0000 STAY
    20 L B+0.0000 F5000
    21 L C+0.0000 FMAX
    22 L X+0.0000 Y+0.0000 FMAX
    23 L Z+1.0000 FMAX
    24 CYCL DEF 200 DRILLING ~
    Q200=+0.1000 ;SET-UP CLEARANCE ~
    Q201=-0.3251 ;DEPTH ~
    Q206=+13 ;FEED RATE FOR PLNGNG ~
    Q202=+0.3251 ;INFEED DEPTH ~
    Q210=+0 ;DWELL TIME AT TOP ~
    Q203=-0.0000 ;SURFACE COORDINATE ~ ; Z is 0 because we're at the face we probed in the middle of the cube
    Q204=+0.9000 ;2ND SET-UP CLEARANCE ~
    Q211=+0.0 ;DWELL TIME AT DEPTH
    25 L X+0.0000 Y+0.0000 FMAX M99 ; X0 and Y0
    26 ; OPERATION NAME = D-DRILL1
    27 M129

    33 PLANE AXIAL B-90.0000 C+0.0000 STAY ; this will rotate the coordinates so the same WCS is facing B-90 - due left.
    34 L B-90.0000 F5000
    35 L C+0.0000 FMAX
    36 L Z+1.5000 F5000
    37 L X-0.5000 Y+0.0000 F5000
    38 CYCL DEF 200 DRILLING ~
    Q200=+0.1000 ;SET-UP CLEARANCE ~
    Q201=-0.3251 ;DEPTH ~
    Q206=+13 ;FEED RATE FOR PLNGNG ~
    Q202=+0.3251 ;INFEED DEPTH ~
    Q210=+0 ;DWELL TIME AT TOP ~
    Q203=+0.5000 ;SURFACE COORDINATE ~ ; Z+0.5 is 1/2 width of cube - if 0 would be starting in middle of stock.
    Q204=+0.9000 ;2ND SET-UP CLEARANCE ~
    Q211=+0.0 ;DWELL TIME AT DEPTH
    39 L X-0.5000 Y+0.0000 FMAX M99 ; note the X-5 (x is up/down now) - X0 is former Z0 which was top of part....

    That's all with solidcam programmed in one style of coodinate system setup, which only requires probing one location.

    (Has this answered your question? I guess the main point is that I wouldn't be fiddling about with cycl 7...)

  5. #5
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    Quote Originally Posted by bryan_machine View Post

    (Has this answered your question? I guess the main point is that I wouldn't be fiddling about with cycl 7...)
    That actually answers the question perfectly! Don't fiddle about. Thanks for the reply!


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