Okuma MB-5000H or similar Horizontal Mill Post Needed


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Thread: Okuma MB-5000H or similar Horizontal Mill Post Needed

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    Default Okuma MB-5000H or similar Horizontal Mill Post Needed

    Hi guys,

    I am in an urgent need for a good post for a simple horizontal Okuma MB series. If anyone has and is willing to share I'd gladly share something in exchange.

    Cheers

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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    Luckily I did find a good post to use.
    Can you guys share how you approach the fixture offset tracking (for Okuma) or in general the zero shifting for multiple parts and multiple sides?



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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    hy gunda, i have no experience with esprit, nor any cam, but about offset tracking, i know that there exist this approaches :
    ... generating all code from the cam, thus without using the macro
    ... using the macro in mdi in order to initialize the wcs, then selecting and executing the program
    ... so far i have never heard of someone that uses a cam to output a file that contains a CALL statement to that macro ( but this does not mean that is not possible )

    when i was dealing with multiple fixtures on a vmc, i was using g-code to switch between active wcs; also, in md1 folder, i have had a file with wcs coordinates for each fixture

    for example, check this pseudo-code :
    - initialize wcs 1
    - run main program
    - initialize wcs 2
    - run main program
    ... and so on

    during loong setups, i was using a different approach, like this :
    - call tool 1, wcs1, cut, wcs2, cut, wcs3, cut
    - call tool 2, wcs1, cut, wcs2, cut, wcs3, cut
    ... and so on, thus i was reducing the tool-changes to a minimal; this also proved to help with restarting and supervising

    kindly

    Last edited by deadlykitten; 03-14-2020 at 12:38 PM.
    ... chip happens


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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    Thanks for the ideas Deadlykitten, I think all of them are very well applicable.
    When speaking about looking for the same solution yesterday I thought it would be a good idea to have the whole program generated with tool shifts and rotations referenced from the rotation center of the table. In Okuma this happens with OO88 and in cases some fine adjustments of the coordinate systems need to be performed the skip block function can be used so that /OO88 doesn't overwrite the values each time the program is run.
    This is probably the easiest and straightforward way to edit the code from the CAM system



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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    I think all of them are very well applicable.
    hey gunda, thx 4 your reply ... what can be done even futher, when using multiple fixtures inside the cabinet, in order to machine 2-3-4-or_more parts at once, is to use a software application that helps to manage fast the wcs of each fixture, operation order and restart cases; it can be implement in okumas, because they are running on windows, and can drastically reduce setup&auxialary times, thus keeping the spindle running

    When speaking about looking for the same solution yesterday I thought it would be a good idea to have the whole program generated with tool shifts and rotations referenced from the rotation center of the table.
    [ hmc with b axis ] = [ vmc with 4th axis ] = [ miling on an y lathe ]

    motions are similar for all those machines ... so yes, is good to have the program generated with all rotations inside it

    this requires a versatile cam ... it should be possible

    In Okuma this happens with OO88
    oo88 was developed to manage such cases, even for cnc's that are more complicated than mb-5000, thus oo88 can handle rotations among 2 or 3 axis

    but, this does not mean that oo88 is the only way to implement this behaviour, especially on an okuma machine, that can do many tricks

    skip block function can be used so that /OO88 doesn't overwrite the values each time the program is run
    when i was using multiple wcs inside the program, i was not using "/" ... i was simply changing the wcs's from code, and machine was stable during restarts

    however, the code was a bit tricky ... perhaps, similar tricks like when using /oo88 ... this is why i started to use the software application that was managing the wcs and operation flow, reducing time with restart sequences, thus helping to identify pretty fast the location where a program needed to be restarted; mass production / kindly

    ... chip happens


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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    Hey deadlykitten, sorry for the delayed reply. I read your post on time but couldn't reply any sooner.
    What app do you use to manage the tool offsets for Okuma. I checked their website and didn't find one responsible for this unfortunately.
    Talking about OO88 - I think using skip function is very handy because once the program is read and all WCS are written in the control according to the calculations done in OO88. After that you can modify each zero point by simply adding a value in the WCS page on the control



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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    What app do you use to manage the tool offsets for Okuma
    hy gunda i can create custom apps and macros; what do you wish for ? not only about oo88, but in general, what do you wish for ?

    Talking about OO88 - I think using skip function is very handy because once the program is read and all WCS are written in the control according to the calculations done in OO88.
    that's one way to do it, but things may go wrong if "/" is being used improperly

    i would try to avoid using "/" : for example, i would calculate all wcs's before the 1st cut, and i would switch between them along the way; so, my advice is to avoid using a single wcs, but switch to using several wcs's : like this, you will remove the "overwrite" case, and also, all your wcs data will be protected during restarts

    code would be like this :
    Code:
    calculate wcs1, wcs2, wcs3 ...
    activate wcs1
    cut with tool 1 , 2 , 3
    activate wcs2
    cut with tool 4 , 5
    activate wcs3
    cut with tool 6 , 7
    that approach works only if you don't use a probe in order to compute rotations; however, even if you would like to use a probe, then is possible to initialize a new wcs after each probing sequence, in order to avoid the faulty "overwrite"

    After that you can modify each zero point by simply adding a value in the WCS page on the control
    i don't understand this one : so, if you use oo88, then you still need to edit the wcs ? this means that the coordinates generated by oo88 are not ok ? kindly

    ... chip happens


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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    My idea is for example is a setup consisting of a tombstone with lets say 4 sides and 4 pieces each side and G15 H1 is the WCS in the center of rotation of the table/tombstone at the base of the table. Each part's WCS are calculated through the rotations and translations of OO88 and the WCSs are written at H11, 12, 13 and 14 for the first side, H21, 22, 23 and 24 for the second side etc.
    Once the program is already run once all WCS are automatically receive their values through OO88 and OO88 is no more necessary and it can be skipped using the skip block function. Also in case of need for compensation of imperfections in the tombstone or to keep the part in tolerance this can be done through small adjustments in the WCS
    I could be not optimal in my approach as I don't have enough experience precisely with this. What's your opinion?



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    Default Re: Okuma MB-5000H or similar Horizontal Mill Post Needed

    hy gunda, those 16 parts are identical ? if yes, how many tools do you use, thus how many atc sequences / part ?

    those 16 parts are big/small, can you share a photo, or you just talk theoretical ?

    your cam(esprit) generates the code with oo88 ? or you add it later, by editing the code ?

    sorry for all those questions, but i need infos in order to suggest a specific approach, because there is a difference between machining 16 different parts at each hour, versus machining 16 identical parts for a few months / kindly

    ... chip happens


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