Fadal 88HS crashing on upper Z with tall fixture offset before tool change


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Thread: Fadal 88HS crashing on upper Z with tall fixture offset before tool change

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    Default Fadal 88HS crashing on upper Z with tall fixture offset before tool change

    This wasn't a problem in the past but it seems to have started in newer version of mastercam post files.

    My G-code (not that is matters but this is coming from helix bore to thread mill):

    N6330 X-3.4141 Y-.1917 I0. J.0547
    N6340 G1 X-3.4528 Y-.153
    N6350 G40 Y-.0984
    N6360 G0 Z.25
    N6370 M5 M9
    N6380 G90 H0 Z0.
    N6390 M1
    N6400 ( 0.372 THREAD MILL TOOL - 3 DIA. OFF. - 3 LEN. - 3 DIA - .372 )
    N6410 T3 M6
    N6420 G0 G90 S3000 M3 E4 X-3.4528 Y-.0984
    N6430 H3 Z.25 M8

    I think the problem is line N6380, I'm guessing that there should be an E0 in there as well. If I'm right in that assumption can someone help point me to the right place in my post file to edit that sucker in?

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  2. #2
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    Default Re: Fadal 88HS crashing on upper Z with tall fixture offset before tool change

    This change occurred why ?
    - new post, editing etc....... what reason ?

    If you had a post , then it is best to update the older post, as any mods would also migrate up
    - new post = unproven output = bloody big headaches & heart attacks

    the area you highlight can be affected by 2 areas
    1- Misc Intergers #3 setting on how reference return is output
    2- coding from the post ..... look for PRETRACT section on how the post outputs codes for preparing to toolchange


    You need to work out what the actual line of code that is required to send Z to the home position
    - for a Fanuc it can be G91 G28 Z0. . or a.... G53 Z0

    ( I haven't used Fadal, so correct me if wrong )
    Don't use E0 as that is changing your work co-ord system, keep it in the same work origin
    H axis is usually the incremental rotary axis around Z.... unless you have a rotary axis, it may be eliminated
    could be a G28 missing, maybe the G90 should also be G91...... if it is G91, put G90 on the following line to keep it safe

    Carefully prove the code off using MDI to show what code sequence does work, then, make the post output that code



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    Default Re: Fadal 88HS crashing on upper Z with tall fixture offset before tool change

    Quote Originally Posted by fadalmatt View Post
    This wasn't a problem in the past but it seems to have started in newer version of mastercam post files.

    My G-code (not that is matters but this is coming from helix bore to thread mill):

    N6330 X-3.4141 Y-.1917 I0. J.0547
    N6340 G1 X-3.4528 Y-.153
    N6350 G40 Y-.0984
    N6360 G0 Z.25
    N6370 M5 M9
    N6380 G90 H0 Z0.
    N6390 M1
    N6400 ( 0.372 THREAD MILL TOOL - 3 DIA. OFF. - 3 LEN. - 3 DIA - .372 )
    N6410 T3 M6
    N6420 G0 G90 S3000 M3 E4 X-3.4528 Y-.0984
    N6430 H3 Z.25 M8

    I think the problem is line N6380, I'm guessing that there should be an E0 in there as well. If I'm right in that assumption can someone help point me to the right place in my post file to edit that sucker in?
    I put the M9 on the retract line: Z.25 M9 (N6360 in your example)
    The M5 on a separate line
    I use G91 G28 Z0 for the return to Z home position - N6380 in your example
    I also use a safety block right after the tool change on all my mills G0G17G40G49G80G90 to make sure there are no residual modal commands that may screw up my programs. This would go right after N6410 in your example
    On the Fadals, because of the safety block, there is no need for the G90 in the work coordinate line - N6420 in your example
    My $0.02 (US)
    DG



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Fadal 88HS crashing on upper Z with tall fixture offset before tool change

Fadal 88HS crashing on upper Z with tall fixture offset before tool change