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  1. #1
    Hi
    ive been building a cnc plasma but cannot seem to get the speed up in Mach3
    The motors run super slow
    im using a dell 755
    wantai 3nm motors
    leadshine em503 drivers
    5 axis Bob off flebay
    24v Siemens psu
    1605 ball screws
    any help will be appreciated by myself and anyone else stuck with this problem
    i will post pics of my build so far
    but I've gave up on it for now till I can find more info
    thanks in advance
    lewis

  2. #2
    You have several problems regards speed.?

    24V isn't enough voltage you really need around 40-45Vdc to get any decent speed from those motors. I'll Also take a guess that they are high inductance motors which makes things worse with low voltage.

    Then you have 5mm pitch screws which will limit your rapid speed.

    But to get a better idea of your setup we need more info.
    Are you using parallel port.?
    Are you using direct drive to screws or do have belts with reduction.?
    What micro stepping on the drives.?
    What values do you have in Motor tuning. :ie Steps Per, Velocity, Acceleration for each axis.?

    When you say slow how slow exactly what's the Max rapid you can achieve.?

  3. #3
    Hi
    im using a parallel port
    its that slow it is barely noticeable
    leadshine drivers have a software called pro tuner
    plug a cable from driver to serial port and I can get decent speeds
    but in Mach 3 it's super super slow
    ive tried all sorts of step per in motor tuning etc
    also tried lots of different micro step setting
    limits and estops work as they should
    motors are direct drive
    because they work with the pro tuner software which connects to the serial port Tells me it's either parallel port related or breakout board
    thanks
    for the reply

  4. #4
    Quote Originally Posted by Lewywri89 View Post
    ive tried all sorts of step per in motor tuning etc
    also tried lots of different micro step setting
    That tells me nothing and Steps per isn't something you guess at it's a fixed number dependant on screw Pitch and Micro stepping.

    One thing that could be doing this is if you have the Units set to Inch but using Millimeter to calculate Steps per.

    Quote Originally Posted by Lewywri89 View Post
    because they work with the pro tuner software which connects to the serial port Tells me it's either parallel port related or breakout board
    No if you can Jog around then everything is working as it should. The only thing that could limit speed is if you have the JOG speed set low.

  5. #5
    Sorry i meant I've tried different steps per just out of curiosity.
    jog speed is set to 100%, units are set in mm
    Sorry I this sounds dumb I'm still learning and thank you for replying :)

  6. #6
    No don't worry you don't sound Dumb but just saying I've tried all sorts doesn't help anyone help you so that's why said doesn't tell me anything.

    Give the Info I asked for and we'll see about getting you going.
    Last edited by JAZZCNC; 17-01-2016 at 09:58 PM.

  7. #7
    post a screenshot of your mach3 motor tuning page? also advise what the microstepping resolution it. if you are direct drive to the ballscrews and they are 5mm pitch, then it is quite simple to set up.

  8. #8
    Ok I will get back to you tomorrow as I'm not in my workshop at the moment
    Thank you

  9. #9
    Click image for larger version. 

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    Sent from my D6503 using Tapatalk

  10. #10
    Sorry couldnt figure out how to upload images but ive got it now
    I think one of tje leadshine drivers are faulty as there is no power to 1 motor
    Hope I can find the problem with it being super super slow


    Sent from my D6503 using Tapatalk

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