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CNC and Coordinate Systems

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  • undefined
    FelixH
    last edited by 20 Jun 2020, 20:23

    Hi all,

    Reading articles, forum posts here and there and watching videos has got me confused as hell... maybe somebody could help me shine some light here?

    Let's see if I understood that correctly:

    • G53 is the Machine coordinate system
    • G54 is the Work Coordinate System #1
    • G55 is the Work Coordinate System #2
    • and so on...

    did I get it right?

    Then I have a macro to manually set the X=0 on WCS #1 which would be:

    G10 P2 L20 X0 ; Sets new zero on WCS #2
    G54 ; switches to WCS #2
    M500

    would that be right?

    So when I send a G10 command:

    P2 is G54
    P3 is G55

    and so on? The Gcode wiki does not specify that...

    1 Reply Last reply Reply Quote 0
    • undefined
      Jacotheron
      last edited by 21 Jun 2020, 09:32

      The first part about G53 being machine coordinates, G54 WCS #1 etc are correct.

      In my CNC I have the G54 already in the config.g to always use it (while Fusion supports multiple WCSs, I never needed more than 1). This ensures we are on WCS #1.

      My macro for setting the XY origin then contains the line: G10 L20 P1 X0 Y0

      The P1, will thus set WCS #1 (aka G54); Therefore, P2 will set WCS #2 (aka G55) etc.

      undefined 1 Reply Last reply 21 Jun 2020, 11:41 Reply Quote 0
      • undefined
        FelixH @Jacotheron
        last edited by 21 Jun 2020, 11:41

        @Jacotheron said in CNC and Coordinate Systems:

        In my CNC I have the G54 already in the config.g to always use it (while Fusion supports multiple WCSs, I never needed more than 1). This ensures we are on WCS #1.

        Hey, thanks for your input. Would you mind sharing that part of the config.g? Nothing on my config.g resembles that... (see below)

        ; Configuration file for Duet
        ; executed by the firmware on start-up
        ; WorkBee Firmware Version 1.0.7
        ; Configure Connection - ENABLE ONLY ONE OF THE BELOW THREE
        M552 S1 ; Enable Wifi Network
        ;M552 S2 ; Enable Access Point Mode
        ;M552 S1 P192.168.2.14 ; Enable Ethernet - Change IP Address to suit
        ; - - - - - - - - - - - - - - - - - - - -
        ; DO NOT CHANGE ANY OF SETTINGS BELOW
        ; TO MAKE A CHANGE, COPY THE LINE OF CODE, PASTE IT INTO customconfig.g. THE CHANGE CAN THEN BE MADE IN customconfig.g
        ; ANY ADDITIONAL SETTINGS SHOULD BE PUT IN customconfig.g
        ; General preferences
        M453 ; Put the machine into CNC Modes
        M550 PWorkBee CNC Machine ; Set machine name
        G90 ; Set absolute coordinates
        ; Network
        M586 P0 S1 ; Enable HTTP
        M586 P1 S0 ; Disable FTP
        M586 P2 S0 ; Disable Telnet
        ; Configure Drives
        M569 P0 S0 ; Drive 0 goes forwards
        M569 P1 S1 ; Drive 1 goes forwards
        M569 P2 S0 ; Drive 2 goes forwards
        M569 P3 S1 ; Drive 3 goes forwards
        M584 X0 Y1:3 Z2 ; Apply drive mapping to axes
        ; Configure Axes
        M92 X400 Y400 Z400 ; Set steps per mm
        M350 X16 Y16 Z16 I1 ; Configure microstepping
        M566 X500 Y500 Z500 ; Set maximum instantaneous speed changes (mm/min)
        M203 X2500 Y2500 Z2500 ; Set maximum speeds (mm/min)
        M201 X150 Y150 Z150 ; Set accelerations (mm/s^2)
        M906 X2400 Y2400 Z2400 I100 ; Set motor currents (mA)
        ; Configure Axis Limits
        M208 X0 Y0 Z0 S1 ; Set axis minima
        M208 X800 Y770 Z94 S0 ; Set axis maxima
        ; Configure Endstops
        M574 X2 Y2 Z2 S0 ; Set active low endstops
        ; Other Settings
        M140 H-1 ; Disable heated bed
        M564 S1 H1 ; Disable jog commands when not homed
        M911 S21.0 R23 P"G91 G1 Z3 F1000" ; Configure power loss resume
        M501 ; Load Stored Parameters
        M98 Pcustomconfig.g ; Execute custom config settings
        1 Reply Last reply Reply Quote 0
        • undefined
          Jacotheron
          last edited by 21 Jun 2020, 15:53

          I added the G54 in the section "Other Settings" myself. Since it does not take further parameters, it simply does what it should.

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          • undefined
            FelixH
            last edited by 21 Jun 2020, 17:02

            Ah, OK. I understand now. Thanks!

            1 Reply Last reply Reply Quote 0
            • undefined
              FelixH
              last edited by 21 Jun 2020, 20:12

              Well, I finally got the time to do some experimenting. If I understood that correctly, I was mistaken regarding the G10 command. It seems it's like this:

              P1 is G54 (WCS #1)
              P2 is G55 (WCS #2)
              etc.

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