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IndustryArena Forum > WoodWorking Machines > DIY CNC Router Table Machines > Growling machine on first trial run... gah!
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  1. #1
    Join Date
    Mar 2010
    Posts
    621

    Growling machine on first trial run... gah!

    Today I finally got a chance to run a sample program and chose the "Road Runner" from the Mach directory.

    So I moved the axis off the home switches and into the center of the workspace, set the axes to zero and hit the Cycle Start button... well to put it mildly the thing sounded like a dead cat moaning as it continued to run the program.. what the heck?

    When tuning the motors the machine sounded nothing like that it was a nice smooth sound high pitched as I increased the speed, this was more of a low growl..

    Could I have the motors tuned to run quickly? or maybe it was running to slowly?

    Looking for some ideas on this one..

    Adam,

    Machine Description
    Gecko G540
    Rack and Pinion Drives-X and A axis
    1/2-10 5 Start Acme-Z Axis
    4-THK HSR 25 Linear Slides
    4 Stepper-NEMA23 KL23H2100-35-4B
    Power Supply-KL-600-48 48V/12.5A 115V /230VAC

  2. #2
    Join Date
    Mar 2003
    Posts
    35538
    If it sounds like the second half of this video, then it's OK.
    https://www.youtube.com/watch?v=UJjivsVwSsQ
    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)

  3. #3
    Join Date
    Mar 2010
    Posts
    621
    Gerry,

    It sounds more like the first half of the video... I was anticipating more of a sound like the second half of the video.

    I'll post some video of it in a little bit.

    Adam,
    Gecko G540, Rack and Pinion Drives-X and A axis, 1/2-10 5 Start Acme-Z Axis
    4-THK HSR 25 Linear Slides, KL23H2100-35-4B, Power Supply-KL-600-48 48V

  4. #4
    Join Date
    Mar 2010
    Posts
    621
    Here's a clip of the dead cat...

    RoadRunner - YouTube
    Gecko G540, Rack and Pinion Drives-X and A axis, 1/2-10 5 Start Acme-Z Axis
    4-THK HSR 25 Linear Slides, KL23H2100-35-4B, Power Supply-KL-600-48 48V

  5. #5
    Join Date
    Mar 2003
    Posts
    35538
    Have you adjusted the trim pots on the drives?
    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)

  6. #6
    Join Date
    Mar 2010
    Posts
    621
    I did adjust the trim pot on the Z but not on the other axes.

    What is my goal in making those adjustments? Can I do it while still mounted or does the stepper need to be removed?
    Gecko G540, Rack and Pinion Drives-X and A axis, 1/2-10 5 Start Acme-Z Axis
    4-THK HSR 25 Linear Slides, KL23H2100-35-4B, Power Supply-KL-600-48 48V

  7. #7
    Join Date
    Mar 2003
    Posts
    35538
    I don't have a G540, but I think the manual explains it. It needs to be done with the motors mounted on the machine and the machine moving.
    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)

  8. #8
    Join Date
    Jan 2013
    Posts
    306
    This is from the G540 manual. You will need to determine what feed rate = 120 RPM on the steppers. Also I have heard it mentioned several times about using a plastic screw driver so as to not accidently short something out on the G540.

    The G540 is composed of four individual G250 motor controls, each of which has a designated pin outputting the smoothness
    adjust trimpot to the G540 motherboard. In your CNC program set the axis being adjusted to move at 2 revolutions per second
    and use a screwdriver to turn the trimpot in the ADJUST hole on the top of the drive. The trimpot has 270 degrees of motion
    and will have an audible “sweet spot” when it is in proper position. This position will change with each motor so be sure to
    readjust if you change motors.


    Steve

  9. #9
    Join Date
    Mar 2010
    Posts
    621
    OK, thanks guy's I'll give that a try next...
    Gecko G540, Rack and Pinion Drives-X and A axis, 1/2-10 5 Start Acme-Z Axis
    4-THK HSR 25 Linear Slides, KL23H2100-35-4B, Power Supply-KL-600-48 48V

  10. #10
    Join Date
    Jan 2013
    Posts
    306
    Just noticed a mistake in my post. Should be 2 revolutions per second or 120 rpm on stepper.

  11. #11
    Join Date
    Mar 2010
    Posts
    621

    Re: Growling machine on first trial run... gah!

    Just wanted to close the loop on this thread and to let you guys know that infact trimming the motors with the trim pots successfully got rid of the noise.

    Thanks.

    Adam,
    Gecko G540, Rack and Pinion Drives-X and A axis, 1/2-10 5 Start Acme-Z Axis
    4-THK HSR 25 Linear Slides, KL23H2100-35-4B, Power Supply-KL-600-48 48V

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