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Thread: mach 4 development

  1. #61
    Gold Member daniellyall's Avatar
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    Default Re: mach 4 development

    yer but if I set things wrong I could show that as well in M3, M4 and linuxcnc as you say flat out, 500ipm is 12700 mm/min if my math is correct, correct me if wrong. now if you set it to a speed mach3 or 4 liked would it look the same on the computer and machine you used, and where`s the screen shot of linuxcnc at the same feed and speeds. also M4 is a not finished products so in a week a year it may well be better.

    M3 has to be bang on or it`s ruff, same with any program I can get M3 running really well at a 1250mm/min if I go faster than that it would look a bit like your picks. at 600mm/min on the small machine there is no difference that mater`s or that can really be seen between the 3 of them.

    at this point it only matter`s to me what linuxcnc 2.7, pathpilot, M4, pokeys, other and UCCNC machine control software will run like on my machine`s at a point where i can run 3D file`s fast and have the 2 problems M3 has gone. showing me a pick of a file running at a speed that most machines will fly apart or walk across a room with only 2 out of the 3 program is not enough for me to speed money to convert to linuxcnc.

    I am not bagging any of the programs or you but if you can show me a program that can cut a3D file fast on a big router all day 24/7 say at 1500mm/min with raped`s at 2000mm/min acc tuned in so the machine is happy, and those 2 problems I have on my big machine don`t happen what gerry mentioned earlier or a different post cant rember where, they are the only problem I have with M3 I might go to that.

    but showing speed`s that I think are to fast on 2 out of 3 is not enough

    Last edited by daniellyall; 09-05-2015 at 12:15 AM.
    <img src="https://ivxo1q-dm2305.files.1drv.com/y4mENMmTr_Cabc7pR0FUdB6gtbADq2JbuG4_rGy0eBQvLJx19pTi6TqMUIJN0xgOyDIc0gWoxYhS38HpbSTFGdfaK-o42IOU6jczrhDpfpCOTNGL1X6hvZCbgj0y35gqmq1YGTrWwShYGV-C7lXA2esy0Pi_WfnBSyroDLSGXwce4uSr1U7op7srdi78rispHCa_K4aFlTlJPVkkNWMfgh_Tg?width=60&height=60&cropmode=none" width="60" height="60" />

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  2. #62
    Member samco's Avatar
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    Default Re: mach 4 development

    Currently mach4 and mach3 have the same trajectory engine. I have done a lot of comparing of mach and 2.7 because I did a lot of the testing of the 2.7 trajectory planner. Mach always ran faster flat out but it cut corners and violated acceleration constraints in my testing. Playing with mach3 trajectory controls I could get a similar path (it doesn't have a way to say follow the programmed path within x amount - it is a setting on how far from the segment end points to start blending - which is odd) but it still violated acceleration constraints.

    Sam



  3. #63
    Member samco's Avatar
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    Default Re: mach 4 development

    This is linuxcnc running the same config. Linuxcnc with strait g64 is - go as fast as you can while touching every segment atleast once. The thing is I can easily tell linuxcnc to follow the gcode path within x amount. No guessing.

    mach 4 development-linuxposlogpath-jpg

    Notice the peak accelerations vs the screenshots of mach3/4

    Sam



  4. #64
    Gold Member daniellyall's Avatar
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    Default Re: mach 4 development

    thank you.

    <img src="https://ivxo1q-dm2305.files.1drv.com/y4mENMmTr_Cabc7pR0FUdB6gtbADq2JbuG4_rGy0eBQvLJx19pTi6TqMUIJN0xgOyDIc0gWoxYhS38HpbSTFGdfaK-o42IOU6jczrhDpfpCOTNGL1X6hvZCbgj0y35gqmq1YGTrWwShYGV-C7lXA2esy0Pi_WfnBSyroDLSGXwce4uSr1U7op7srdi78rispHCa_K4aFlTlJPVkkNWMfgh_Tg?width=60&height=60&cropmode=none" width="60" height="60" />

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  5. #65
    Member ger21's Avatar
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    Default Re: mach 4 development

    M3 has to be bang on or it`s ruff, same with any program I can get M3 running really well at a 1250mm/min if I go faster than that it would look a bit like your picks.
    Not sure what's wrong with your machine or setup, but you should be able to run much faster than 1250mm/min, which is only 50ipm. I can run my homebuilt machine at 4x that speed with no problems.

    A friend of mine was doing 3D cutting with Mach3 at 400+ipm, and getting results that would be perfectly acceptable for most people, but not perfect. Switching to UCCNC, using the same feedrate, gets about 30% faster cut times and perfect parts.

    Unless your big machine has rigidity issues, is severely under powered, or is just poorly designed with motors that don't match the drive system, then UCCNC should give you at least 5x more speed that the 1500mm/min you'd be happy with.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  6. #66
    Gold Member daniellyall's Avatar
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    Default Re: mach 4 development

    yer there is something wrong with it. it`s a bit cold at the moment to spend lots of time with it, but one question what is a good reduction for a r an p 4 to 1 or 5.5 to 1, it has 1250 oz/in motors on the Y axis plus slave it run`s on gecko G213v running at 70 vdc ESS, mb06 v2 bob same size motor on Z but with a 5mm pitch ball screw. X axis has a 750 oz/in motor what the correct size for the mass of the Z axis carriage power to weight and all that.

    so the ball screw for Z need changed for a 10 mm pitch that`s what most of the problem is with the speed for Z Axis I need to pull one of the r and p drives of to check what the reduction is and the pinion size and what tooth count is. it`s hard to see it look`s to be 5.5 to 1.

    I can run x a lot faster, and y can go faster but then if I have Z over 1250 mm/min it goes bad.

    I know its not a electrical problem thats all good, it ridged enough, its something small and silly

    <img src="https://ivxo1q-dm2305.files.1drv.com/y4mENMmTr_Cabc7pR0FUdB6gtbADq2JbuG4_rGy0eBQvLJx19pTi6TqMUIJN0xgOyDIc0gWoxYhS38HpbSTFGdfaK-o42IOU6jczrhDpfpCOTNGL1X6hvZCbgj0y35gqmq1YGTrWwShYGV-C7lXA2esy0Pi_WfnBSyroDLSGXwce4uSr1U7op7srdi78rispHCa_K4aFlTlJPVkkNWMfgh_Tg?width=60&height=60&cropmode=none" width="60" height="60" />

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  7. #67
    Member ger21's Avatar
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    Default Re: mach 4 development

    Put a low inductance 400oz motor (6 or 7 amps) on the Z axis and it will be 5x faster.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  8. #68
    Member samco's Avatar
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    Default Re: mach 4 development

    After many new features, much testing, and many bug fixes, I'm pleased
    to announce the release of LinuxCNC 2.7.0!

    This release is codenamed "I Kill Kokomo".

    The major new features since 2.6 are:

    * new trajectory planner (from Rob Ellenberg of Tormach)
    * support for RT-Preempt real-time (from Jeff Epler)
    * support for importing Mach3 configs via StepConf
    * better ARM support
    * better docs
    * many new drivers and features
    * bug fixes
    * probably other things that I've forgotten!


    Instructions on how to upgrade from 2.6 to 2.7.0 are here (note this may
    require manual changes to your config, detailed on this webpage):

    http://linuxcnc.org/docs/2.7/html/ge...-linuxcnc.html


    Instructions on how to make a fresh install of 2.7.0 are here:

    http://linuxcnc.org/docs/2.7/html/ge...-linuxcnc.html


    Many thanks to all the folks who worked hard to add features, fix bugs,
    write docs, run tests, and report how things were or weren't working.

    Here's to many more years of friendly, effective collaboration!



  9. #69
    Member hanermo's Avatar
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    Default Re: mach 4 development

    There is, or may be, 2 issues.
    First of all ..
    is it 12700 mm/min, or 1270 mm / minute.

    Second;
    Whats your step size.

    Third;
    Whats your goal

    In any case, your problem re: speed are easily solved with 2x the resolution, 5x the acceleration, and 3x the speed.
    Just use ac brushless servos.

    Quote Originally Posted by daniellyall View Post
    yer there is something wrong with it.




  10. #70
    Gold Member daniellyall's Avatar
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    <img src="https://ivxo1q-dm2305.files.1drv.com/y4mENMmTr_Cabc7pR0FUdB6gtbADq2JbuG4_rGy0eBQvLJx19pTi6TqMUIJN0xgOyDIc0gWoxYhS38HpbSTFGdfaK-o42IOU6jczrhDpfpCOTNGL1X6hvZCbgj0y35gqmq1YGTrWwShYGV-C7lXA2esy0Pi_WfnBSyroDLSGXwce4uSr1U7op7srdi78rispHCa_K4aFlTlJPVkkNWMfgh_Tg?width=60&height=60&cropmode=none" width="60" height="60" />

    Being Disabled is OK CNC is For fuN


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