z axis losing steps as I cut.


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    Default z axis losing steps as I cut.

    I am using fusion 360 for design and cam. I have mach3 on a cnc router table.
    When I start the cut, the machine got to the correct place and cuts correctly. Tonight I tried again and here is what happened. The first three holes worked just fine. As the cuts progressed, I seemed to loose steps(?). When I watched it more closely, I see that when the spindle retracted and moved to the new drill location, instead of going down to the work piece, it raised up, slowed for the cut then moved on to the next location and did the same thing, it rose up for the cut not down!
    A bit of back story as well....
    I have successfully made this cut before without issue as a trial in wood. When I went to do a final cut in aluminum, the computer crashed. After the computer was fixed, I have been getting this issue. I have tried to compare various g-codes and they seem to be the same but I'm still a little uncertain if it is the computer, mach3, fusion, or me that is causing the problems.
    If anyone has any information on where to start looking for a solution, please let me know!
    I have set the ref all and then set the zeros at the work piece. Which I have rarely done before but I am searching for anything that may work.
    If ya need any more information, please let me know.
    Thanks in advance,
    rockaukum

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    Default Re: z axis losing steps as I cut.

    You say the computer crashed and was 'fixed'. How was it fixed? Did you have to reinstall the operating system (Windows, I assume), reinstall Mach3, etc.? Were all the settings replaced by backups or created again from scratch? Are there any peripheral boards that might have been affected - ESS, etc.?

    David

    David
    Romans 3:23
    Etsy shop opened 12/1/17 - CurlyWoodShop
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    Default Re: z axis losing steps as I cut.

    Hey David,
    Yes the computer crashed. I had a black screen with the white cursor blinking in the upper left of the screen. What solved that issue was to remove and reinstall the ram. Took lots of reading and such but that was all it took. I started the computer in safe mode to see if there was anything else going on but was clear. I did that after each of the four ram chips were installed, one at a time. So, Nothing was changed or need to be reloaded in order for the computer to work. This computer is not on line either if that matters.
    rockaukum



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    Default Re: z axis losing steps as I cut.

    Quote Originally Posted by rockaukum View Post
    I am using fusion 360 for design and cam. I have mach3 on a cnc router table.
    When I start the cut, the machine got to the correct place and cuts correctly. Tonight I tried again and here is what happened. The first three holes worked just fine. As the cuts progressed, I seemed to loose steps(?). When I watched it more closely, I see that when the spindle retracted and moved to the new drill location, instead of going down to the work piece, it raised up, slowed for the cut then moved on to the next location and did the same thing, it rose up for the cut not down!
    A bit of back story as well....
    I have successfully made this cut before without issue as a trial in wood. When I went to do a final cut in aluminum, the computer crashed. After the computer was fixed, I have been getting this issue. I have tried to compare various g-codes and they seem to be the same but I'm still a little uncertain if it is the computer, mach3, fusion, or me that is causing the problems.
    If anyone has any information on where to start looking for a solution, please let me know!
    I have set the ref all and then set the zeros at the work piece. Which I have rarely done before but I am searching for anything that may work.
    If ya need any more information, please let me know.
    Thanks in advance,
    rockaukum
    Post the G-Code Program, there may be something in it, it could also be noise also, which would be a wiring problem, it could also so be Motor tuning that the acceleration and velocity is set to high, so something to look at

    Mactec54


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    Default Re: z axis losing steps as I cut.

    Mactec54,
    The code is a .tap file and it will not accept this type of file, how do I load the code for this forum?
    I did recheck the distance traveled for the z and it was good. You helped me with the vid recently, I have done several cuts since then, so I don't understand why There would be a noise issue or that the acceleration / velocity would have changed?
    rockaukum
    here is one part of the code, the first part. I tried to break up the code and run each portion as a separate function and had the same results

    (1001)
    (T15 D=0.25 CR=0. TAPER=30DEG - ZMIN=-0.0394 - CHAMFER MILL)
    N10 G90 G94 G91.1 G40 G49 G17
    N15 G20
    N20 G28 G91 Z0.
    N25 G90


    (DRILL4)
    N30 M5
    N35 M9
    N40 T15 M6
    N45 S14000 M3
    N50 G54
    N55 G0 X1.7319 Y0.3504
    N60 G43 Z0.64 H15
    N65 Z0.24
    N70 G98 G81 X1.7319 Y0.3504 Z-0.0394 R0.2 F13.1
    N75 Y0.8524
    N80 Y1.3543
    N85 X1.7316 Y1.8562
    N90 X1.7319 Y2.3583
    N95 Y2.8602
    N100 X1.7325 Y3.3633
    N105 X1.7319 Y3.8642
    N110 Y4.3662
    N115 X1.7292 Y4.8664
    N120 X1.7319 Y5.3701
    N125 Y5.8721
    N130 Y6.374
    N135 X0.2374
    N140 Y5.8721
    N145 Y5.3701
    N150 X0.2367 Y4.8704
    N155 X0.2374 Y4.3662
    N160 Y3.8642
    N165 X0.2397 Y3.3621
    N170 X0.2374 Y2.8602
    N175 Y2.3583
    N180 X0.2378 Y1.8562
    N185 X0.2374 Y1.3543
    N190 Y0.8524
    N195 Y0.3504
    N200 G80
    N205 Z0.64


    N210 G28 G91 Z0.
    N215 G90
    N220 G28 G91 X0. Y0.
    N225 G90
    N230 M30



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    Default Re: z axis losing steps as I cut.

    I’d look closely at the setup files for your G-Code processor. It is always possible that invalid says information got saved at some point.

    Also it is always worth having a set of hand written G-Code programs to do maintenance and diagnostics programming with. Hand written to avoid possible configuration issues with CAM software. These codes should be simple and always ran in the same way giving the same results. If not machine behavior that deviates against expected behavior can lead you to problem areas.



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    Default Re: z axis losing steps as I cut.

    Thanks for the response Wizard,
    I'm not sure about your first comment. I guess I'm not sure what I would be looking for or at?
    As for simple code to run, I will try another code that was generated with sheetcam and see how that goes. I guess that if the same thing happens it would lead to something within the settings in mach3?
    thanks again,
    rockaukum
    PS I am currently working on reproducing the drawing in Inkscape then code it with sheetcam to see what happens there as well.



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    Default Re: z axis losing steps as I cut.

    Here is the video of what is happening. I am leaning towards this being a mach3 issue? However I am at a loss as to what may be causing this and why it has changed.
    rockaukum





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    Default Re: z axis losing steps as I cut.

    Quote Originally Posted by rockaukum View Post
    Mactec54,
    The code is a .tap file and it will not accept this type of file, how do I load the code for this forum?
    I did recheck the distance traveled for the z and it was good. You helped me with the vid recently, I have done several cuts since then, so I don't understand why There would be a noise issue or that the acceleration / velocity would have changed?
    rockaukum
    here is one part of the code, the first part. I tried to break up the code and run each portion as a separate function and had the same results

    (1001)
    (T15 D=0.25 CR=0. TAPER=30DEG - ZMIN=-0.0394 - CHAMFER MILL)
    N10 G90 G94 G91.1 G40 G49 G17
    N15 G20
    N20 G28 G91 Z0.
    N25 G90


    (DRILL4)
    N30 M5
    N35 M9
    N40 T15 M6
    N45 S14000 M3
    N50 G54
    N55 G0 X1.7319 Y0.3504
    N60 G43 Z0.64 H15
    N65 Z0.24
    N70 G98 G81 X1.7319 Y0.3504 Z-0.0394 R0.2 F13.1
    N75 Y0.8524
    N80 Y1.3543
    N85 X1.7316 Y1.8562
    N90 X1.7319 Y2.3583
    N95 Y2.8602
    N100 X1.7325 Y3.3633
    N105 X1.7319 Y3.8642
    N110 Y4.3662
    N115 X1.7292 Y4.8664
    N120 X1.7319 Y5.3701
    N125 Y5.8721
    N130 Y6.374
    N135 X0.2374
    N140 Y5.8721
    N145 Y5.3701
    N150 X0.2367 Y4.8704
    N155 X0.2374 Y4.3662
    N160 Y3.8642
    N165 X0.2397 Y3.3621
    N170 X0.2374 Y2.8602
    N175 Y2.3583
    N180 X0.2378 Y1.8562
    N185 X0.2374 Y1.3543
    N190 Y0.8524
    N195 Y0.3504
    N200 G80
    N205 Z0.64


    N210 G28 G91 Z0.
    N215 G90
    N220 G28 G91 X0. Y0.
    N225 G90
    N230 M30
    Try using X & Y positions for all holes. We had some older controls at a place i used to work that would randomly drill out of position if we didn’t do that.



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    Default Re: z axis losing steps as I cut.

    Seems to be double posting again just deleted this post

    Mactec54


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    Default Re: z axis losing steps as I cut.

    Quote Originally Posted by rockaukum View Post
    Mactec54,
    The code is a .tap file and it will not accept this type of file, how do I load the code for this forum?
    I did recheck the distance traveled for the z and it was good. You helped me with the vid recently, I have done several cuts since then, so I don't understand why There would be a noise issue or that the acceleration / velocity would have changed?
    rockaukum
    here is one part of the code, the first part. I tried to break up the code and run each portion as a separate function and had the same results
    I don't see a problem with this program but will run it to see if it does the same thing

    Post the piece of code where the problem happens

    This is the same program run this and see if it all works, this I ran through Mach3 you will see the changes I made, this may not solve your problem but if this runs through then you are on the right track, you can cut and paste this into notepad then save it to a thumb drive to load into your control, if you can't find the file when you load it then select all files and you will see it


    %
    (1001)
    (T15 D=0.25 CR=0. TAPER=30DEG - ZMIN=-0.0394 - CHAMFER MILL)
    N10 G90 G94 G40 G17
    N15 G20
    N20 G0 Z.640
    N25 G90
    N30 M5
    N35 M9
    N40 T15 M6 (Drill4)
    N45 S14000 M3
    N50 G54
    N55 G0 X1.7319 Y0.3504
    N60 G43 Z0.64 H15
    N65 Z0.24
    N70 G98 G81 X1.7319 Y0.3504 Z-0.0394 R0.2 F13.1
    N75 Y0.8524
    N80 Y1.3543
    N85 X1.7316 Y1.8562
    N90 X1.7319 Y2.3583
    N95 Y2.8602
    N100 X1.7325 Y3.3633
    N105 X1.7319 Y3.8642
    N110 Y4.3662
    N115 X1.7292 Y4.8664
    N120 X1.7319 Y5.3701
    N125 Y5.8721
    N130 Y6.374
    N135 X0.2374
    N140 Y5.8721
    N145 Y5.3701
    N150 X0.2367 Y4.8704
    N155 X0.2374 Y4.3662
    N160 Y3.8642
    N165 X0.2397 Y3.3621
    N170 X0.2374 Y2.8602
    N175 Y2.3583
    N180 X0.2378 Y1.8562
    N185 X0.2374 Y1.3543
    N190 Y0.8524
    N195 Y0.3504
    N196 G80G0Z0.64
    N198 G0 Z2.
    N199 G90G53G0 X0. Y0.
    N200 M30
    %

    You can save the file in MS word as Text your file or even Note pad, the program can have a end name as Text this will run on your control as well, You can also just cut and paste it into your post

    Last edited by mactec54; 02-13-2019 at 01:48 PM. Reason: Missing % at the start and end of the program
    Mactec54


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    Default Re: z axis losing steps as I cut.

    Thee are quirks in teh G81 drill cycle that can show up from time to time. Try changing to another drill cycle like G83 and retest.

    Just a thought, (;-) TP



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z axis losing steps as I cut.

z axis losing steps as I cut.