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Thread: back to the ol drawing board....

  1. #1
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    back to the ol drawing board....

    started the plaque for pop for fathers day yesterday morning. seemed to be going ok. it had generated 447k lines of code, and was cutting rather smoothly, when i left it had gone through over 115k of the code. then i had to go to a fathers day to-do at the wife's church was putting on. when we got back about 6 hours later, it was still going, but instead of the smooth moves it was doing, it was moving in fits and starts, from a little over 1/8 to 1/2 inch. it was following the path it was supposed to, but real herky-jerky like that. i'll be putting in a call with the shapeoko people today, any ideas here? almost forgot, when we got back it had roughly 206k of code to go before finishing.
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  2. #2
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    For the amount of time your machine had been running, it could have gotten too hot. Heat can cause the motors to hesitate; it can also cause the drivers to shut down - all of which can be intermittent and cause jerky motion. As I recall, you mounted the Arduino/gShield in an enclosure with a fan, so the drivers might be OK.

    Have you checked the drive current settings? There are different ways to do it and I chose to measure the voltage at the driver. There's a good discussion of the process in this Shapeoko thread.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  3. #3
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    after a bit of looking around, i may have discovered the problem. it seems that the universal gcode sender has issues with files over 250k lines of code. i found this on the github site after using the search 'universal gcode sender non responsive' in google. the writer of ugc said that it would be necessary to increase the amount of memory in the JVM, as ugc loads the entire program all at once. so, i boosted the memory to 3 gig, and i also found that the system stops the hard drive after 5 minutes on battery, and 20 minutes plugged in, if unattended. so i boosted that to 24 hours on plug in. now to see if that works. as for temps, the spindle was cool to the touch, and the electronics were cool as well. now to find a good chunk of time to test the new settings out in...
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  4. #4
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    Quote Originally Posted by Dan Noren View Post
    ... as for temps, the spindle was cool to the touch, ...
    The stepper motors are what I was referring to getting hot.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  5. #5
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    Quote Originally Posted by Dan Noren View Post
    ... the writer of ugc said that it would be necessary to increase the amount of memory in the JVM, as ugc loads the entire program all at once. so, i boosted the memory to 3 gig ...
    I assume you modified the line in start-windows.bat. What value did you use in place of 256m?
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  6. #6
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    no, didn't get into the start windows.bat, went in through the control panel/programs/java and changed the runtime parameters from blank to 3 gig.
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  7. #7
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    Quote Originally Posted by Dan Noren View Post
    no, didn't get into the start windows.bat, went in through the control panel/programs/java and changed the runtime parameters from blank to 3 gig.
    OK. The github article you referenced mentioned changing the startup parameter. When I dug a bit deeper, I found that the "-Xmx" parameter can be changed to increase the memory allotted to UGS. The default is "-Xmx256m". I changed mine to "-Xmx1024m" based on the article. I haven't had any issues such as you described, but the largest gcode file I've had so far was about 180k lines.

    Where did you get the info about changing the Java settings in Control Panel?
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  8. #8
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    i did a google search under changing java space settings.
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  9. #9
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    Started again five and a half hours ago, and 161k lines sent and still going strong.
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  10. #10
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    ... ...

    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

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