Video 4th AXIS SET UP AND RUN PARTS


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    Default 4th AXIS SET UP AND RUN PARTS

    Hi Folks. All is well in my neck of the woods, just a bit too busy...

    Here is a video of setting up the 4th axis and running parts - feel free to post your 4th axis related information.

    Cheers Cliff



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    Nice video, thanks.
    Have you ever used the 4th axis homing probe tormach sells. It use to work great with Mach but not so well with path pilot.

    Quote Originally Posted by keen View Post
    Hi Folks. All is well in my neck of the woods, just a bit too busy...

    Here is a video of setting up the 4th axis and running parts - feel free to post your 4th axis related information.

    Cheers Cliff





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    Default Re: 4th AXIS SET UP AND RUN PARTS

    "Nice video, thanks.
    Have you ever used the 4th axis homing probe tormach sells. It use to work great with Mach but not so well with path pilot."

    Thanks - No I do not have a 4th axis home set up - so far I have been able to run the parts before shut down and so have not needed a rotary orientation reset on start up.

    I assume that is the main use for it? Cheers Cliff



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    It us useful for me when flipping parts.


    Quote Originally Posted by keen View Post
    "Nice video, thanks.
    Have you ever used the 4th axis homing probe tormach sells. It use to work great with Mach but not so well with path pilot."

    Thanks - No I do not have a 4th axis home set up - so far I have been able to run the parts before shut down and so have not needed a rotary orientation reset on start up.

    I assume that is the main use for it? Cheers Cliff




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    Default Re: 4th AXIS SET UP AND RUN PARTS

    I have the 4th axis home set up but haven't used it. One of the reasons to use it is so you don't have to "unwind" the axis after a long spiral cut. i.e. if the cut starts at A0 and does 6 revolutions to A2160 then goes back to A0 for the next pass, it will take a minute or so for the A axis to unwind. Re-homing the A-axis after each pass eliminates that.



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    Default Re: 4th AXIS SET UP AND RUN PARTS

    I was wondering if there is a G Code/software script that you can install in the code that will change an axis position - eg on reaching A2160 reset the DRO to A0.00...that would be useful.

    Cliff



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    Default Re: 4th AXIS SET UP AND RUN PARTS

    Quote Originally Posted by keen View Post
    I was wondering if there is a G Code/software script that you can install in the code that will change an axis position - eg on reaching A2160 reset the DRO to A0.00...that would be useful.

    Cliff
    Hi Cliff
    I ran into this issue on my very first 4th axis part. I had to wait 20 minutes for the A axis to return to A0
    I solved this in my Sprutcam post but that probably won't help you, but it can be done in G-Code. I just tried this out quickly and it appears to work:
    Code:
    G10 L20 P[#5220] A[#5423-360*ROUND[#5423/360]]
    G0 A0
    The first line unwraps the A axis by subtracting as many whole turns as necessary to get the machine coordinates within 180 degrees, and the second line should need no explanation.
    I suspect someone might have a more elegant equation but I couldn't find many functions that are supported by g-code.
    Try it out before you use it to make a part!
    Step



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    You can. just type in 'G0A0' in the DRO and the 4th will return to zero. Thanks


    QUOTE=keen;2080600]I was wondering if there is a G Code/software script that you can install in the code that will change an axis position - eg on reaching A2160 reset the DRO to A0.00...that would be useful.

    Cliff[/QUOTE]



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    Default Re: 4th AXIS SET UP AND RUN PARTS

    Quote Originally Posted by CadRhino View Post
    Nice video, thanks.
    Have you ever used the 4th axis homing probe tormach sells. It use to work great with Mach but not so well with path pilot.
    I tried to get the hal sensor to work on my super spacer and path pilot. It seems to work but I think my sprutcam code still unwinds the axis and as mentioned above it takes time.
    Need to do a little snooping and hacking now that I read tsteps post.

    BTW Keen you make some nice looking parts . I need to add a electronic probe system to my crib. Just looks like a fun tool to use and impress the neighbors.
    Adding to this discussion I use a 5c collet holder in my 8" super spacer chuck for small parts. Holds the material away from 8" chuck, very rigid and when I sweep the faces / edges of material or part they align well and easy to adjust. That said a tormach 5c 4th axis holder would be the best solution if its easy to align on face plate.



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    Default Re: 4th AXIS SET UP AND RUN PARTS

    [QUOTE=CadRhino;2080762]You can. just type in 'G0A0' in the DRO and the 4th will return to zero. Thanks

    Thanks for posting CR - But if you type in G0A0 it just commands the A axis to mechanically wind to that point? I mean I want a auto 'software position' conversion in the code. Cheers Cliff



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    Default Re: 4th AXIS SET UP AND RUN PARTS

    Quote Originally Posted by TurboStep View Post
    Hi Cliff
    I ran into this issue on my very first 4th axis part. I had to wait 20 minutes for the A axis to return to A0
    I solved this in my Sprutcam post but that probably won't help you, but it can be done in G-Code. I just tried this out quickly and it appears to work:
    Code:
    G10 L20 P[#5220] A[#5423-360*ROUND[#5423/360]]
    G0 A0
    The first line unwraps the A axis by subtracting as many whole turns as necessary to get the machine coordinates within 180 degrees, and the second line should need no explanation.
    I suspect someone might have a more elegant equation but I couldn't find many functions that are supported by g-code.
    Try it out before you use it to make a part!
    Step
    Thanks Step ! You know your stuff! I would like to try that. Please would you reply with the exact code for me to enter at the end of my job G code. My code starts on A0 and ends on A270 - but then slowly winds back to A0 at the next run of the code of course. I would like the A270 position to become A0. Would you be able to give me the exact code to insert please.

    Cheers Cliff



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    Default Re: 4th AXIS SET UP AND RUN PARTS

    Cliff,

    Assuming you are working the part in G54 offset, then I think the code you append at the end (or beginning) of the run should be:

    G10 L2 P1 A0
    G0 A0

    If you are working the part in G55, then the P-number will be "2"

    Taken from Tormach's page on G-code:
    To set the coordinate values for the origin of a fixture coordinate system, program:
    G10 L2 P~ X~ Y~ Z~ A~, where the P number must evaluate to an integer in the range 1 to 255 – the fixture number (Values 1 to 6 corresponding to G54 to G59) – and all axis words are optional. The coordinates of the origin of the coordinate system specified by the P number are reset to the coordinate values given (in terms of the absolute coordinate system). Only those coordinates for which an axis word is included on the line will be reset.

    It is an error if:

    • The P number does not evaluate to an integer in the range 0 to 255.

    If origin offsets (made by G92 or G92.3) were in effect before G10 is used, they will continue to be in effect afterwards. The coordinate system whose origin is set by a G10 command may be active or inactive at the time the G10 is executed. The values set will not be persistent unless the tool or fixture tables are saved using the buttons on Tables screen.

    Emphasis mine on the last sentence. I don't use or know PathPilot, so of course please prove this out in a non-expensive way prior to production work. You could insert that bit of code at the beginning of the program, and it'll be like pressing the A-axis 'zero' button.

    Regards,
    Spumco




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