Mitsubishi M64 4th axis rotary won't continuously rotate, no more than 360deg
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  1. #1
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    Default Mitsubishi M64 4th axis rotary won't continuously rotate, no more than 360deg

    I posted about this install before, I was able to get working accept for it won't rotate past 360deg, the axis is set to reference home, it is setup to be a rotary axis, without indexing. Im not sure what the parameters should be set for to make it rotate past 360. I ran a test program and everything worked great until it made it to 359deg and then the machine errors M01 OPERATIONAL ERROR, basically you've gone past the limit, however I have the limits set at the highest settings they can be I think 2013 is the overtravel parameter. Anyone with 4th and parameters willing to share or help me get this going, it's soooo close to being ready
    Attached Thumbnails Attached Thumbnails 16274420687212095884028909702197.jpg  

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    Did you set parameter 1017 to 1 for the rotary axis? Also parameter 1090 affects how you command rotary positions.

    2013 and 2014 are soft limits for linear axes. For your rotary you set matching values (other than 0) to these. That should disable soft limit function.

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    Not had much experience with overtravel on a mill, but with C axis on the lathes, we need to overfeed using the INCR value for C, which is H.
    Can you not just G91 A-720.000 ???


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    It errors within 360deg

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    If you need to go no more than 720*, one other trick is to start at -360 and feed to +360*.


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    Quote Originally Posted by Ox View Post
    If you need to go no more than 720*, one other trick is to start at -360 and feed to +360*.


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    Thanks, that's good
    The toolpath I was trying was the spiral from fusion360, thanks for that little work around. I'm super brand new to 4th axis but I did try climb cutting in titanium with this rotary and the finish looks pretty good, I still gotta tune the backlash parameter when I get to that point

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    Had you set the parameters I outlined in a previous post? Mainly curious since I don’t have a 4th on my machine to test with.

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    Quote Originally Posted by Vancbiker View Post
    Had you set the parameters I outlined in a previous post? Mainly curious since I don’t have a 4th on my machine to test with.
    Yes they been set like that pretty much from the get. I wasn't sure if maybe there is a PLC bit select or something that I'm missing here. One thing I know I don't have set or is at a 0 is the parameter for Div\Rotation maybe that's worth a try

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    If you go to 270° then to 0° which way does it go?

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    I noticed it won't go to a negative number on the position readout. I have been able to get it to jog past 359° if I jog it suuuuper slow otherwise it errors, but then it resets to 0°

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    On (at least) one of mine, it won't G90 to a neg, so I rapid to A0, and then I can G91 into the negatives.
    I'm not sure how far? I would ass_u_me that to be an endless amount, but kan't say that I have tried that.

    I would guess that you could G91 past A+359.999 as well?




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    Default Finally found it

    So after hrs of searching through all the literature I found where it says it won't rotate past 359° in abs and that it will in incremental more. Here is a screenshot of the info. Thanks for all the help. I can't believe mitsu tech support couldn't tell me that over the phone.screenshot_20210907-103959.jpg


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