1. #1
    Hi all,

    I am new to CNC but I have always been interested in machining.
    Last week I got a 3040 DQ with usb and thought it would be ok for a start but am a little annoyed to find basic problems.
    The instructions are not clear and are in broken English, the left hand linear bearing was fitted the wrong way around, and when moving on the y axis quite noisy the grease nipple had made a nasty groove along the inside of the left rail.
    I have removed the nipple just to carry out some test runs and found a problem with the x axis this is not accurate and very noisy especially when changing direction.
    I have swapped the x and y connections over on the controller and the problem moves to the y axis, the x axis is then smooth.
    From my basic knowledge it seems to be a stepper controller or a software issue, can anyone advise.

    Many thanks

    Len

  2. #2
    Have you checked the microstep settings for the drivers. Really we need more detail to help. Photos would be good.
    Last edited by cropwell; 6 Days Ago at 05:35 PM.
    Albert Einstein may have been a genius, but his brother Frank, was a monster

    Having just moved to Windows 10 (which is crap) My stress levels are through the roof !!!

  3. #3
    Thanks for the reply,
    Sorry for the lack of info but I didn’t know what you might need.
    I’m using the program that came with the machine which is CNC USB, I think it’s part of Planet CNC perhaps not ideal but I am using a laptop with a USB ports only and no D25 printer port.
    My x y and z axis are set at 400.000 steps per unit the initial speed is set at 100.00 and the acceleration is set at 15.000
    The feed speed is 250.00 and the Traverse is at 500.00
    I have checked the movement on all three axis with a digital DTI and the y and z are both repeatedly correct and nice and smooth and quite.
    But the z drive is clunky and noisy and not accurate if you set 10.0000 mm you may get 11.89 or 11.08 it’s different on each run.
    I hope this is of help.

    Many thanks Len.

  4. #4
    OK, so you can move the problem about by swapping connectors on the control box. This, to me, indicates that the problem is not mechanical.

    From your first post, I get the implication that the machine, controller and software is a Chinese clone of the Planet CNC. So I would be getting into territory which I have no experience. Sorry, but I will have to pass on this problem. I hope someone else can help you.
    Last edited by cropwell; 6 Days Ago at 08:25 PM.
    Albert Einstein may have been a genius, but his brother Frank, was a monster

    Having just moved to Windows 10 (which is crap) My stress levels are through the roof !!!

  5. #5
    Again Much appreciated for having a look,
    The controller has a serial port and a USB port so maybe I might resurrect one of my old computers and load Mach 3, this will test the software.

    Many thanks Len.

  6. #6
    Quote Originally Posted by Lennewton View Post
    Again Much appreciated for having a look,
    The controller has a serial port and a USB port so maybe I might resurrect one of my old computers and load Mach 3, this will test the software.

    Many thanks Len.
    Are you sure it has a serial port !!
    ..Clive
    The more you know, The better you know, How little you know

  7. #7
    Sorry I ment a parallel port.

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