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  1. #12
    Quote Originally Posted by RichardR View Post
    No I was not aware of that, so I need to take all the earths separately to a connection on the back of the machine, choc strip, then one wire to the bolt on the control box?
    While I am on I wonder if you can help with the amount of travel of the Axis, for instance the machine is set up for mm however the actual movement on the axis's do not correspond with the amount that was inputted. I presume that if I enter G0 X10 then it should move 10 centimetres but it only moves approx. 6 centimetres. Am I correct in thinking that if I enter a code of G0 X0.05 then it should move 5mm. I get very confused with Metric but I have a feeling that the 6040 has a metric screw thread, although I cannot find any information on it now.
    Ok I'll start with the Earths first.

    Only earth one end of the screen on each cable to the single Gnd point in the control box. Likewise, any other earths should be taken or run from this single point.

    Now the movement. Any commands like G0 X10 are in MM's not Cm's so G0 X10 would move 10mm.
    If you are not moving the correct distance this will be because your Steps Per setting is wrong in the Motor tuning section.
    The steps per amount is a calculation based on the amount of Micro stepping used in the drives and the pitch and if used any ratio applied.
    So lets say you have 1600 micro steps set on the drives and the ballscrew pitch is 5mm and the motor is direct drive so no ratio the Step per calculation would 1600/5=320 steps per mm.

    Now you probably don't know the Micro steps and if your not sure about the ball screw pitch then Mach3 does have feature where it will calculate the steps per based on distance travelled.
    Go to the Settings tab and just above the red Reset button you'll see a button that says Set steps Per Unit. Click this and it will ask which axis to calibrate, then it will ask you to enter a distance to move in mm's, enter a distance and when you click enter the machine will move, then it ask you to enter the actual distance the machine moved, from this it will caculate the steps per unit.
    So before doing this make a reference mark some where on the machine or the bed which you can acurately measure from. For a first try I suggest you enter a small amount just in case your settings are way off target and measure the distance it moved. Then repeat this over the longest distance you can accurately measure, the secret is accuracy in your measuring. A tape measure is NOT accurate enough, If you have a digital vernier gauge then you can use this by opening it up wide and zeroing it out, then let the machine shove it to see how far it moves. ie: 150mm vernier then opens wide and set the distance to 100mm and see what it actually measures. Enter this value into the steps per calculator when it asks for distance travelled.

    Do this for each axis.
    Last edited by JAZZCNC; 25-10-2020 at 11:03 PM.
    -use common sense, if you lack it, there is no software to help that.

    Email: [email protected]

    Web site: www.jazzcnc.co.uk

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