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Thread: Haas Safe Tool Change Posistion with Parameter 210 & 266

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    brian.pallas's Avatar
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    Default Haas Safe Tool Change Posistion with Parameter 210 & 266

    I just found out how to get the Haas mills to go to a set posistion whenver M06 or ATC FWD/ ATC REV Button is pushed, using Paramter 210 and Paramter 266 for X axis. But if the Z axis is down by the part, and you do a tool change all three axis move to the tool change posistion at the same time. Does anyone know how to have the Z axis come up first?

    (The program itself is set for safe tool change posistion, but sometimes the operator will want to look at a tool and not think about what's going to happen and whack the part or fixture. I also always make it so they just have to go to MDI and push start and it moves to the safe posistion, but......)

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    tc1999 is offline Hot Rolled
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    Quote Originally Posted by brian.pallas View Post
    But if the Z axis is down by the part, and you do a tool change all three axis move to the tool change posistion at the same time. Does anyone know how to have the Z axis come up first?
    What year machine? This has never been the case on any Haas I've ever been on...in fact, it is pretty bad practice IMO to move all three on a tool change. (as is the reason for your post...). Every Haas I've ever been on only moves Z to the tool change position.




    Quote Originally Posted by brian.pallas View Post
    I also always make it so they just have to go to MDI and push start and it moves to the safe posistion, but......)
    So, IOW, MDI, which is easily altered, is engrained in their fingers as a quick safe move? This could go bad quick.

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    brian.pallas's Avatar
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    If you use parameter 210 and type in an X number and then go to paramter 266 and set "Zero Axis TC" to 1, the machine will move to that spot you defined whenever any toolchange is commanded, even using an ATC FWD or REV button.

    Except that if the Z isn't home it will move Z to home while it's moving to the safe X posistion, with pushing the ATC FWD button.

    The question I have is does anyone know a way in this setup to have the Z come up first?

    I'm just looking to prevent a crash as much as possible.

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    machineit2 is offline Cast Iron
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    Why are you adding an X move to the tool change?????

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    tc1999 is offline Hot Rolled
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    Quote Originally Posted by machineit2 View Post
    Why are you adding an X move to the tool change?????
    Only reason would be some crazy high setup on the table that needs to be avoided.

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    SeymourDumore is online now Diamond
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    Quote Originally Posted by tc1999 View Post
    Only reason would be some crazy high setup on the table that needs to be avoided.

    Nah, that would still be a problem!
    Think about it. If the toolchange must be done at a very specific X and Y position for the Z to clear, then you would have the same problem getting to that X and Y position WHILE the head is at Z0.

    And yes, having a standard MiniMill I do need to be aware of what's where on the table, so often times I need to make sure it moves appropriately, and by that I need to know where I am at and how to get to the safe
    spot.

    OTOH, Brian only mentioned an X move before the toolchange, not Y. This doesn't make much sense other than perhaps the case where the rotary axis is mounted on the left ( I have it that way on the VF4 with the 6" rotary )
    In that case you may not want to have your umbrella swinging with long tools just anywhere, or your sidemount to whack right above. A single X move is sufficient, but then the question is why can't one make sure the tool is above the part
    before initiating a FWD/RV change?

    To the OP, sorry, I can't answer that. I also can't answer why most mills do not have an incremental axis command such as on the lathes. ( U, W, V etc. )

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    machineit2 is offline Cast Iron
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    Quote Originally Posted by tc1999 View Post
    Only reason would be some crazy high setup on the table that needs to be avoided.
    True, but that would be different for each set-up.

    I run shafts in my mill that require me to run with Z in a positive position of sometimes 3+ inches and I program my clearance moves into the program itself. But, I would never leave it in the control for all programs. That just makes little sense to me.

    Mike

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    tc1999 is offline Hot Rolled
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    Quote Originally Posted by SeymourDumore View Post
    Nah, that would still be a problem!
    Think about it. If the toolchange must be done at a very specific X and Y position for the Z to clear, then you would have the same problem getting to that X and Y position WHILE the head is at Z0.
    I have thought about it and have actually needed to do it...

    -Current tool goes to a Z-clearance move (which may be above the tool change position),
    -then move table, change tools to a long tool,
    -then you call a G43 after the tool change with a positive Z move (obviously)so that new tool clears before moving table.

    I've done it a bunch in the past...also, not sure in this scenario, but what about a SMTC? You may be OK at Z0 on every tool but what happens when the arm drops 4"



    Quote Originally Posted by machineit2 View Post
    True, but that would be different for each set-up.

    I run shafts in my mill that require me to run with Z in a positive position of sometimes 3+ inches and I program my clearance moves into the program itself. But, I would never leave it in the control for all programs. That just makes little sense to me.

    Mike

    I couldn't agree more which is why I said what I said. (some crazy high setup...i.e: not normal...)

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    SeymourDumore is online now Diamond
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    TC

    That's the point!
    If your setup is high, you need to do this:

    Quote Originally Posted by tc1999 View Post
    I have thought about it and have actually needed to do it...

    -Current tool goes to a Z-clearance move (which may be above the tool change position),
    -then move table, change tools to a long tool,
    -then you call a G43 after the tool change with a positive Z move (obviously)so that new tool clears before moving table.
    To be specific,, your clearance is above the toolchange Z!

    But Brian wants this:

    Except that if the Z isn't home it will move Z to home while it's moving to the safe X posistion, with pushing the ATC FWD button.

    The question I have is does anyone know a way in this setup to have the Z come up first?
    He only wants to move to Z-home, which will still interfere with the toolchange.

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    tc1999 is offline Hot Rolled
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    LOL ...So really, he just needs to move Z to home before the machine moves out of the way?...

    I guess the answer is there is no way to do it in regards to how he is trying...? I have never put a X or Y more in the parameters for tool changes.

    Even if I had to do 1 program a month this way I would just do it manually I think. Since you manually have to change the parameters back and forth, I think I would just as soon make the program have the safe moves with the way the machine normally changes tools...

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    tc1999 is offline Hot Rolled
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    Just thought of this also as an option...how about a post modification so you do a "G28 G91Z0" move before the tool change then when the M6 is called it will go to your X and Y position while Z is already home...?
    RoboMiller likes this.

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    Quote Originally Posted by tc1999 View Post
    Just thought of this also as an option...how about a post modification so you do a "G28 G91Z0" move before the tool change then when the M6 is called it will go to your X and Y position while Z is already home...?
    i guess u could command z positive then have an m6 to get that extra clearance. but i have not done this

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