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Thread: Mach3 - BOB - Loosing steps

  1. #13
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    Default Re: Mach3 - BOB - Loosing steps

    Maybe your PC power supply had bloated caps inside that`s causing the parallel port noises, I had an experience on it several times, changed the PC power supply and all the unusual noises became flat out



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    Default Re: Mach3 - BOB - Loosing steps

    Quote Originally Posted by propellanttech View Post
    ~
    I'll stick to ethernet connections.
    ~

    James L
    Makes sense if that's the best you can do.



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    Default Re: Mach3 - BOB - Loosing steps

    Quote Originally Posted by ger21 View Post
    Mach3 performance is very much tied to the specific PC. Some PC's run mach3 very well, and some can't run Mach3 at all.
    Assuming we're talking PP performance here....First rule of thumb is to avoid laptops and COTS PCs. Secondly, a decent dedicated PP board will invariably outperform the PP provided with the ubiquitous onboard super I/O chip. Something like this;

    DSC_6044.jpg photo - Eldata photos at pbase.com

    Then there are hardware configuration, BIOS configuration, OS configuration, app configuration/avoidance and usage tips that apply to any OS (Windows or Linux) when using PP. LCNC's usage verification approach is to run a latency test while throwing everything you expect to be doing on the PC while machining parts. It then decides what's the highest step rate one can get away with. Mach3's approach, other than running the driver test, is to just not do anything else on the PC while machining parts. I've gotten better results using Mach3's approach even when not doing anything else with LCNC. Some tips are mentioned in the old post/thread below, and IIRC, Artsoft has a text file with tips on using Mach3 with Windows XP out there somewhere.

    Ossiloscope image needed

    None of the foregoing should be anything new to seasoned PP users. OTOH, newcomers wanting to avoid these hassles, may do well by just getting an external controller (ESS /USS come to mind). It's really a pity there aren't many, if any, options in between in terms of cost.

    Last edited by eldata; 08-12-2017 at 11:05 AM.


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    Registered SoCalPlaneDoc's Avatar
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    Default Re: Mach3 - BOB - Loosing steps

    Quote Originally Posted by propellanttech View Post
    Let me explain why I asked;

    Any Windows operating system after 98 doesn't give the parallel port priority with relation to time. Hence why many systems have moved away from the parallel port. The pulses can be interrupted by anything Windows deems more important, hence lost pulses. You do not have this problem is running Linux, or other operating systems.

    James L
    Precisely why I stopped using any Mach product, and went to LinuxCNC/Pathpilot.
    Zero issues since.. absolutely zero.

    Automated Machinery Designer - PCNC1100 Series III upgrade, Graziano Sag 12 Lathe
    Solidworks 2016 (SW Certified), HSMWorks


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    Default Re: Mach3 - BOB - Loosing steps

    Let me explain why I asked;

    Any Windows operating system after 98 doesn't give the parallel port priority with relation to time. Hence why many systems have moved away from the parallel port. The pulses can be interrupted by anything Windows deems more important, hence lost pulses. You do not have this problem is running Linux, or other operating systems.

    James L
    Quote Originally Posted by SoCalPlaneDoc View Post
    Precisely why I stopped using any Mach product, and went to LinuxCNC/Pathpilot.
    Zero issues since.. absolutely zero.
    There's probably more to this than initially meets the eye. Doesn't LCNC/PathPilot use a motion control card? If so, then you've addressed the shortcomings of software step generation whether it be using Windows or Linux. Using an external motion controller with Windows and Mach3 would achieve the same thing. I'm guessing Tormach chose LCNC because of cheaper (free?) Linux Open Source arrangements.

    Last edited by eldata; 08-12-2017 at 04:38 PM.


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    Default Re: Mach3 - BOB - Loosing steps

    I'm guessing Tormach chose LCNC because of cheaper (free?) Linux Open Source arrangements.
    Not cheaper, but because they had full control over it. They are now the developer, and can fix bugs, and add features as needed. With Mach3, they had a dead product. No developmentr, no bug fixes.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

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

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


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    Default Re: Mach3 - BOB - Loosing steps

    Quote Originally Posted by eldata View Post
    There's probably more to this than initially meets the eye. Doesn't LCNC/PathPilot use a motion control card?
    Not exactly. Tormach chose to use a Mesa card in in a motherboard slot, with a BOB that's "smart"... firmware controls the pinout... Then, they made a custom HMI screen, which is why the Tormach has a so-much-more professional feel. But that's just how they chose to implement LinuxCNC..

    I now have my router running the same software but using a traditional parallel IO card and C10 BOB. That router used to have Mach3 and a Galil motion controller, that was the most unstable platform I ever used. Imagine now I dont have to endure a 6 hour job stopping because that feekin hobbiest software decided to freeze up. I coudnt not walk away from it for fear of returning and finding it motionless with the router still spinning.. the lengths I had to go to to be able to recover from that were ridiculous.

    Linux runs more than fast enough on old PCs, the one on my router I bought all-up used for $260 on eBay and has never so much a burped. I was never a fan of linux in the past but now it's my best friend
    Added a touch screen, it's every bit the look-and-feel of the HAAS machines at work.

    Automated Machinery Designer - PCNC1100 Series III upgrade, Graziano Sag 12 Lathe
    Solidworks 2016 (SW Certified), HSMWorks


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    Default Re: Mach3 - BOB - Loosing steps

    Quote Originally Posted by ger21 View Post
    Not cheaper, but because they had full control over it. They are now the developer, and can fix bugs, and add features as needed. With Mach3, they had a dead product. No developmentr, no bug fixes.
    Bad guess on my part. Thanks for the correction.



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    Default Re: Mach3 - BOB - Loosing steps

    Quote Originally Posted by SoCalPlaneDoc View Post
    ~
    That router used to have Mach3 and a Galil motion controller, that was the most unstable platform I ever used.
    ~
    Linux runs more than fast enough on old PCs
    ~
    Didn't you post this elsewhere;

    Quote Originally Posted by SoCalPlaneDoc View Post
    Galil is awesome BUT, the plugin for Mach3 is buggy and devoid of many features.. I'd advise against using it with Mach3 - I'm sorry I used it for my CNC router.
    The machine will stop without any idea as to why and only a reboot will get you out of the failure mode. and the auto-Z doesnt work at all.
    A high-volume poster here who was supposedly an expert told me it was a driver problem and couldn't offer an alternative... quantity over quality I guess

    My new router is running PathPilot perfectly.. Never again will I use Mach.

    Much of my Galil stuff is destined for eBay.
    And if so, what's the precise connection between Windows' shortcomings vs Linux's alluded to in this exchange here;

    Let me explain why I asked;

    Any Windows operating system after 98 doesn't give the parallel port priority with relation to time. Hence why many systems have moved away from the parallel port. The pulses can be interrupted by anything Windows deems more important, hence lost pulses. You do not have this problem is running Linux, or other operating systems.

    James L
    Quote Originally Posted by SoCalPlaneDoc View Post
    Precisely why I stopped using any Mach product, and went to LinuxCNC/Pathpilot.
    Zero issues since.. absolutely zero.
    BTW, what step rate does LCNC limit you to based on latency-test results?



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    Default Re: Mach3 - BOB - Loosing steps

    Quote Originally Posted by eldata View Post
    BTW, what step rate does LCNC limit you to based on latency-test results?
    I dont have any idea, and I dont plan to find out.. why? because I simply dont need to.
    Win I ran Windows/Mach I was constantly having to tweak settings, troubleshoot problems, check with user boards, etc... just to make something..

    When I made the switch to Linux/LinuxCNC that all went away.. Now I just make parts, I dont need to know the intimate details of how trons move around inside my computer box.. I just make parts.
    I have these machines so I can make stuff and make money. I'm not interested in trying to tweak weak software into working.. I got work to do.

    some folks buy cars so they can fool around under the hood.- they like to chat about cam timing and compression ratios, hack-in to NOS and see how fast they co go a city block....

    .. I got places to go.

    Automated Machinery Designer - PCNC1100 Series III upgrade, Graziano Sag 12 Lathe
    Solidworks 2016 (SW Certified), HSMWorks


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Mach3 - BOB - Loosing steps
Mach3 - BOB - Loosing steps