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home position axis drift...

Discussion in 'Trouble Shooting - Support - Help Section' started by rjarois, Mar 24, 2009.

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  1. Flashsolutions

    Flashsolutions Active Member

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    Well, that's a good one for the books. At least now we know what happens if your controller cannot keep up with the PC. :ugeek:
     
    Flashsolutions, Mar 25, 2009
    #26
  2. 66tbird

    66tbird Moderator Staff Member

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    'The old kernel speed problem, can't believe you fell for that one' ;)

    -Maxwell Smart- 196?
     
    66tbird, Mar 25, 2009
    #27
  3. rcav8r

    rcav8r Moderator Staff Member

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    HUmmm. don't think that's the problem with mine as my kernal speed is the default. Then again I'm running a jalopy of a PC (above the specs listed on MAch3 site though) so maybe this is the problem with mine too? PC not feeding the controller fast enough... buffer under run?
     
    rcav8r, Mar 25, 2009
    #28
  4. rjarois

    rjarois Moderator Staff Member

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    rcav8r, i just slapped in a 2.4ghz quad core, and i thought it would feed a faster kernel. what cpu you using?? they recomend at least a 1ghz min for mach-3
     
    rjarois, Mar 25, 2009
    #29
  5. rjarois

    rjarois Moderator Staff Member

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    lmao, t-bird.....
     
    rjarois, Mar 25, 2009
    #30
  6. 3DMON

    3DMON Moderator Staff Member

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    I don't know how I missed this thread when you first posted. I'm glad you've found the problem. Good info Randy.
     
    3DMON, Mar 25, 2009
    #31
  7. rjarois

    rjarois Moderator Staff Member

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    thanks shawn, i found a post on that cnc site......he had the same problem....hopefully no one else has to now, lols...randy.
     
    rjarois, Mar 25, 2009
    #32
  8. rcav8r

    rcav8r Moderator Staff Member

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    OK, so I'm not exactly to spec ;) Memory and Graphics card are OK. CPU is borderline though. I can't say I fully understand this as the Y and X are just fine and they are processing a lot more code, but I'm fine with this as a solution... If I zero the Z for every sheet I never notice it when cutting a sheet of foam, even with a lot of parts.
     
    rcav8r, Mar 26, 2009
    #33
  9. kram242

    kram242 Administrator Staff Member

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    :lol:
    Glad to see that you found the problem Randy.
    This is lesson we can all learn from, way to go everyone with all your good ideas and helpful insight, this was a tough one to solve.
    I have experimented with selection different kernel speeds and read a little into it but everywhere they tell you that if you have a really fast system you could set it higher but also that there is little or no difference in performance so just to leave it at 25 the recommended setting.
    On another token I have been testing the look ahead function of Mach to see if it helps to smooth out the cutting process at these faster speeds of the MKII.I thought that I would have to raise the kernal speed. I have set the look ahead to 200 lines without effecting the kernel and I run other apps in the background while I am cutting like Sketchup and IE. So this is good news and a good find thanks everyone and Randy for really digging into this good job :D
    Mark
     
    kram242, Mar 27, 2009
    #34
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