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    Feature Request - workpiece angle compensation CNC

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    • dc42undefined
      dc42 administrators @jrentschler01
      last edited by dc42

      @jrentschler01 please test G68 using one of the firmware binaries at https://www.dropbox.com/sh/4h5zqc0ki73wa9r/AABrMZxfMzMH4M0uJQPLsBmQa?dl=0.

      Please note, these report the version as 3.4.0-beta6, however they are only candidates for the 3.4.0beta6 release. So please install the official beta6 when we release it.

      I have tested basic G1, G2 and G3 moves with G68 and I believe they are working correctly. I have forbidden using G92 to set X or Y when G68 is in effect. I haven't taken account of G68 in any other situations - there may be some where RRF ought to.

      The coordinate rotation defined by G68 is ignored when running system macros such as pause.g, resume.g, tool change and homing files.

      Duet WiFi hardware designer and firmware engineer
      Please do not ask me for Duet support via PM or email, use the forum
      http://www.escher3d.com, https://miscsolutions.wordpress.com

      jrentschler01undefined 1 Reply Last reply Reply Quote 0
      • jrentschler01undefined
        jrentschler01 @dc42
        last edited by

        @dc42 I tested now with G1 the same wy with drawing a simple rectangle and it worked so far, I assume G2&G3 as well. Thank you a lot.
        I'm continue getting a macro ready to probe the workpice and calulate the angle like @jay_s_uk mentioned.

        It would be great if we could visualize it after that somehow.

        Jürgen

        1 Reply Last reply Reply Quote 0
        • CanDo415undefined
          CanDo415 @jay_s_uk
          last edited by

          @jay_s_uk said in Feature Request - workpiece angle compensation CNC:

          @jrentschler01 i've written a macro.
          this in theory should work but I haven't tested it yet.

          var y_first_measurement = 0
var y_second_measurement = 0
var y_length = 0
var x_first_measurement = 0
var x_second_measurement = 0
var x_length = 0
var y_over_x = 0
var y_x_tan_rads = 0
var y_x_tan_deg = 0

M291 P"Put the probe on the left hand side of the bottom edge" S2 X1 Y1 Z1		; Pop up box asking for operator input
M558 F1500																		; Set the initial probing speed
G38.2 Y600 P0 K0																	; Probe the material as a first pass
G1 Y{move.axes[1].machinePosition-5}											; Move 5mm away from the material
M558 F150																		; Set the final probing speed
G38.2 Y600 P0 K0																	; Probe the material again
M400																			; Make sure all movement is complete
set var.y_first_measurement=move.axes[1].machinePosition						; Record the stop position y_first_measurement
set var.x_first_measurement=move.axes[0].machinePosition						; Record the stop position x_first_measurement
M400																			; Make sure all data recording is complete
G1 Y{move.axes[1].machinePosition-5}											; Move 5mm away from the material
G1 X{move.axes[0].machinePosition+50}											; Move along the workpiece in X
M558 F1500																		; Set the initial probing speed
G38.2 Y600 P0 K0																	; Probe the material as a first pass
G1 Y{move.axes[1].machinePosition-5}											; Move 5mm away from the material
M558 F150																		; Set the final probing speed
G38.2 Y600 P0 K0																	; Probe the material again
M400																			; Make sure all movement is complete
set var.y_second_measurement=move.axes[1].machinePosition						; Record the stop position y_second_measurement
set var.x_second_measurement=move.axes[0].machinePosition						; Record the stop position x_second_measurement
M400																			; Make sure all data recording is complete
set var.y_length={var.y_second_measurement-var.y_first_measurement}
set var.x_length={var.x_second_measurement-var.x_first_measurement}
set var.y_over_x={var.y_length/var.x_length}
set var.y_x_tan_rads=atan(var.y_over_x)
set var.var y_x_tan_rads = degrees{var.y_x_tan_rads}
G68 A0 B0 R{var.y_x_tan_rads}

          Now this will ask you to jog to the bottom edge of your material, ideally you should go to somewhere near the bottom left.
          This is of course assuming you're using a probe that can probe in X, Y and Z and its set as K0. I use a vers.by probe.
          It uses G38.2 and stores the X and Y coordinates of each point. Once it probes the first point, it moves 50mm in X and probes again.
          The angle is then calculated and fed into G68.
          If you don't want to set it that way, its set using G68 Ax Bx Rx where Ax is the centre point to rotate around in X, Bx is the centre point to rotate around in Y and Rx is the angle to offset and is counterclockwise

          Hello,
          Very good job so far.
          I still get an error while running the macro.
          "M292
          Error: in file macro line 37 column 13: meta command: expected '='
          "
          Can somebody help me?

          Phaedruxundefined 1 Reply Last reply Reply Quote 0
          • Phaedruxundefined
            Phaedrux Moderator @CanDo415
            last edited by

            @CanDo415 Can you share your firmware version?

            Z-Bot CoreXY Build | Thingiverse Profile

            CanDo415undefined 1 Reply Last reply Reply Quote 0
            • CanDo415undefined
              CanDo415 @Phaedrux
              last edited by

              @Phaedrux 3.4.1

              Phaedruxundefined 1 Reply Last reply Reply Quote 0
              • Phaedruxundefined
                Phaedrux Moderator @CanDo415
                last edited by

                @CanDo415 Please update to 3.5.1 and double check your macro that it matches the one shared. Particularly the line number the error reports.

                Z-Bot CoreXY Build | Thingiverse Profile

                CanDo415undefined 1 Reply Last reply Reply Quote 0
                • CanDo415undefined
                  CanDo415 @Phaedrux
                  last edited by

                  @Phaedrux
                  copied the macro.
                  I have to fix all problems from the update first. Messed up my whole config😧

                  1 Reply Last reply Reply Quote 0
                  • CanDo415undefined
                    CanDo415
                    last edited by CanDo415

                    "Error: in file macro line 37 column 12: meta command: unknown variable 'var'"
                    is the new result after updating to 3.5.1

                    var y_first_measurement = 0
var y_second_measurement = 0
var y_length = 0
var x_first_measurement = 0
var x_second_measurement = 0
var x_length = 0
var y_over_x = 0
var y_x_tan_rads = 0
var y_x_tan_deg = 0
 
M291 P"Probe links vor das Werstück positionieren" S2 X1 Y1 Z1					; Pop up box asking for operator input
M558 F1500																		; Set the initial probing speed
G38.2 Y600 P0 K0																	; Probe the material as a first pass
G1 Y{move.axes[1].machinePosition-5}											; Move 5mm away from the material
M558 F150																		; Set the final probing speed
G38.2 Y600 P0 K0																	; Probe the material again
M400																			; Make sure all movement is complete
set var.y_first_measurement=move.axes[1].machinePosition						; Record the stop position y_first_measurement
set var.x_first_measurement=move.axes[0].machinePosition						; Record the stop position x_first_measurement
M400																			; Make sure all data recording is complete
G1 Y{move.axes[1].machinePosition-10}											; Move 5mm away from the material
G1 X{move.axes[0].machinePosition+50}											; Move along the workpiece in X
M558 F1500																		; Set the initial probing speed
G38.2 Y600 P0 K0																	; Probe the material as a first pass
G1 Y{move.axes[1].machinePosition-5}											; Move 5mm away from the material
M558 F150																		; Set the final probing speed
G38.2 Y600 P0 K0																	; Probe the material again
M400																			; Make sure all movement is complete
set var.y_second_measurement=move.axes[1].machinePosition						; Record the stop position y_second_measurement
set var.x_second_measurement=move.axes[0].machinePosition						; Record the stop position x_second_measurement
M400																			; Make sure all data recording is complete
set var.y_length={var.y_second_measurement-var.y_first_measurement}
set var.x_length={var.x_second_measurement-var.x_first_measurement}
set var.y_over_x={var.y_length/var.x_length}
set var.y_x_tan_rads=atan(var.y_over_x)
set var.var y_x_tan_rads=degrees{var.y_x_tan_rads}
G68 A0 B0 R{var.y_x_tan_rads}
                    jay_s_ukundefined droftartsundefined 2 Replies Last reply Reply Quote 0
                    • jay_s_ukundefined
                      jay_s_uk @CanDo415
                      last edited by

                      @CanDo415 i have a mistake in my macro. i have corrected my original

                      Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                      CanDo415undefined 1 Reply Last reply Reply Quote 0
                      • CanDo415undefined
                        CanDo415 @jay_s_uk
                        last edited by

                        @jay_s_uk
                        @Phaedrux
                        Error: line 37 column 22: meta command: unknown value 'degrees'
                        there seems to be a bit more

                        jay_s_ukundefined 1 Reply Last reply Reply Quote 0
                        • jay_s_ukundefined
                          jay_s_uk @CanDo415
                          last edited by

                          @CanDo415 i've made another change but I don't think its going to fix the issue.
                          I don't know why "degrees" throws an error though as its a built in command

                          Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                          CanDo415undefined OwenDundefined 2 Replies Last reply Reply Quote 0
                          • CanDo415undefined
                            CanDo415 @jay_s_uk
                            last edited by

                            that's why i added Phaedrux.

                            I want to change it a bit to get the corner as well. so the degrees issue has to be solved anyway.
                            Thanks for the great start jay

                            CanDo415undefined 1 Reply Last reply Reply Quote 0
                            • CanDo415undefined
                              CanDo415 @CanDo415
                              last edited by

                              @dc42
                              maybe he can help?

                              1 Reply Last reply Reply Quote 0
                              • droftartsundefined
                                droftarts administrators @CanDo415
                                last edited by

                                @CanDo415 @jay_s_uk

                                set var.var y_x_tan_rads=degrees{var.y_x_tan_rads}

                                There's a space in the variable name, ie var.var y_x_tan_rads isn't a valid variable name.

                                Ian

                                Cartesian bed-slinger with Duet 3 Mini 5+ WiFi and 1LC : RRP Fisher Delta v1 with Duet 2 Maestro : TronXY X5S with Duet 3 MB6HC and Roto toolboard

                                CanDo415undefined 1 Reply Last reply Reply Quote 0
                                • CanDo415undefined
                                  CanDo415 @droftarts
                                  last edited by CanDo415

                                  @droftarts
                                  jay corrected it already.
                                  the problem shifted to the degrees command

                                  1 Reply Last reply Reply Quote 0
                                  • OwenDundefined
                                    OwenD @jay_s_uk
                                    last edited by

                                    @jay_s_uk said in Feature Request - workpiece angle compensation CNC:

                                    @CanDo415 i've made another change but I don't think its going to fix the issue.
                                    I don't know why "degrees" throws an error though as its a built in command

                                    degrees() is a function

                                    You've used curly braces instead of parentheses

                                    set var.y_x_tan_deg=degrees{var.y_x_tan_rads}

                                    try

                                    set var.y_x_tan_deg=degrees(var.y_x_tan_rads)
                                    jay_s_ukundefined CanDo415undefined 2 Replies Last reply Reply Quote 2
                                    • jay_s_ukundefined
                                      jay_s_uk @OwenD
                                      last edited by jay_s_uk

                                      @OwenD i knew it would be something about the way its been formatted
                                      updated the original again

                                      Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                                      1 Reply Last reply Reply Quote 0
                                      • CanDo415undefined
                                        CanDo415 @OwenD
                                        last edited by

                                        @OwenD
                                        thank you for showing up the problem

                                        CanDo415undefined 1 Reply Last reply Reply Quote 0
                                        • CanDo415undefined
                                          CanDo415 @CanDo415
                                          last edited by

                                          G68 A0 B0 R{-var.y_x_tan_rads}
                                          the "-" seems important. otherwise the system gets turned the wrong way round

                                          CanDo415undefined 1 Reply Last reply Reply Quote 0
                                          • CanDo415undefined
                                            CanDo415 @CanDo415
                                            last edited by CanDo415

                                            @jay_s_uk
                                            i modified it quite a bit. some points are still not ready.
                                            I'm not shure how to ent the if passage.
                                            end if seems not to work

                                            var y_1 = 0
var x_1 = 0
var x_2 = 0
var x_3 = 0
var x_4 = 0
var x_5 = 0
var delta_x = 0
var y_2 = 0
var y_3 = 0
var y_4 = 0
var y_5 = 0
var delta_y = 0
var z0 = 0
var d_probe = 0
var m_1 = 0
var m_2 = 0
var m_1_tan_rads = 0
var m_1_tan_deg = 0
 
M291 P"position probe over front left corner of workpiece" S2 X1 Y1 Z1	; Pop up box asking for operator input
M558 F300																		; Set the initial probing speed
G38.2 Z-60 P0 K0																; Probe the material as a first pass
M558 F50																		; Set the final probing speed
G38.4 Z50 P0 K0	                                                                                                                                ; Move away from workpiece in Z
M400																			        ; Make sure all movement is complete
set var.z0=move.axes[2].machinePosition	                			    		                ; Record the stop position y_first_measurement
M400																			        ; Make sure all data recording is complete

G1 Z{move.axes[2].machinePosition+5}										; Move along the workpiece in X
G1 X{move.axes[0].machinePosition-20}										; Move 5mm away from the material
G1 Y{move.axes[1].machinePosition+5}										; Move 5mm away from the material
G1 Z{move.axes[2].machinePosition-3}											; Move along the workpiece in X

M558 F1000																		; Set the initial probing speed
G38.2 X100 P0 K0																; Probe the material as a first pass
M558 F50																		; Set the final probing speed
G38.4 X-10 P0 K0	                                                                                                                        ; Move away from workpiece in X
M400																			        ; Make sure all movement is complete
set var.y_1=move.axes[1].machinePosition							    		        ; Record the stop position y_first_measurement
set var.x_1=move.axes[0].machinePosition							    		        ; Record the stop position x_first_measurement
M400																			        ; Make sure all data recording is complete

G1 X{move.axes[0].machinePosition-5}											; Move 5mm away from the material
G1 Z{move.axes[2].machinePosition+10}										; Move along the workpiece in X
G1 X{move.axes[0].machinePosition+15}										; Move 5mm away from the material
G1 Y{move.axes[1].machinePosition-20}										; Move 5mm away from the material
G1 Z{move.axes[2].machinePosition}	    										; Move along the workpiece in X

M558 F1000																		; Set the initial probing speed
G38.2 Y100 P0 K0																; Probe the material as a first pass
M558 F50																		; Set the final probing speed
G38.4 Y-10 P0 K0															        ; Probe the material again
M400																			        ; Make sure all movement is complete
set var.y_2=move.axes[1].machinePosition								    	        ; Record the stop position y_first_measurement
set var.x_2=move.axes[0].machinePosition					    				        ; Record the stop position x_first_measurement
M400																			        ; Make sure all data recording is complete
G1 Y{move.axes[1].machinePosition-50}										; Move 5mm away from the material
G1 X{move.axes[0].machinePosition+50}										; Move along the workpiece in X
M558 F1000																		; Set the initial probing speed
G38.2 Y100 P0 K0																; Probe the material as a first pass
M558 F50																		; Set the final probing speed
G38.4 Y-10 P0 K0																; Probe the material again
M400																			        ; Make sure all movement is complete
set var.y_3=move.axes[1].machinePosition								    	        ; Record the stop position y_second_measurement
set var.x_3=move.axes[0].machinePosition								    	        ; Record the stop position x_second_measurement
M400																			        ; Make sure all data recording is complete
M291 P"Probe Diameter" R"enter diameter of probe" S5 L0 H10			; Pop up box asking for operator input diameter of 
set var.d_probe=input															; set the diameter of the probe
;calculation
set var.delta_y={var.y_3-var.y_2}
set var.delta_x={var.x_3-var.x_2}
set var.m_1={var.delta_y/var.delta_x}											; m of the staight P2-P3
set var.m_2={(-var.delta_x)/var.delta_y}										        ; m of perpendicilar to straight P2-P3
set var.m_1_tan_rads=atan(var.m_1)
set var.m_1_tan_deg=degrees(var.m_1_tan_rads)

;calc the corner of workpeace
set var.x_4=((var.y_1-(-(var.x_3-var.x_2)/(var.y_3-var.y_2))*var.x_1)-(var.y_2-((var.y_3-var.y_2)/(var.x_3-var.x_2)*var.x_2)))/(((var.y_3-var.y_2)/(var.x_3-var.x_2))-(-(var.x_3-var.x_2)/(var.y_3-var.y_2)))
set var.y_4=(-(var.x_3-var.x_2)/(var.y_3-var.y_2))*((var.y_1-(-(var.x_3-var.x_2)/(var.y_3-var.y_2))*var.x_1)-(var.y_2-((var.y_3-var.y_2)/(var.x_3-var.x_2)*var.x_2)))/(((var.y_3-var.y_2)/(var.x_3-var.x_2))-(-(var.x_3-var.x_2)/(var.y_3-var.y_2)))+(var.y_1-(-(var.x_3-var.x_2)/(var.y_3-var.y_2))*var.x_1)
If var.y_2>var.y_3																; workpiece Zero coordinates
set var.x_5=var.x_4+(COS(ARCTAN(var.m_1))+COS(ARCTAN(var.m_2)))*var.d_probe/2
set var.y_5=var.y_4+(SIN(ARCTAN(var.m_1))+SIN(ARCTAN(var.m_2)))*var.d_probe/2
If var.y_2<var.y_3
set var.x_5=var.x_4+(COS(ARCTAN(var.m_1))-COS(ARCTAN(var.m_2)))*var.d_probe/2
set var.y_5=var.y_4+(SIN(ARCTAN(var.m_1))-SIN(ARCTAN(var.m_2)))*var.d_probe/2

;move over workpiece zero and set tool x&y to 0
G1 Y{move.axes[1].machinePosition-1}											        ; Move 1mm away from the material
G1 Z{move.axes[2].machinePosition+10}											; Move above workpiece

;G68 A0 B0 R{-var.m_1_tan_deg}                                                                                                        ; set Rotation
                                            Exerqtorundefined 1 Reply Last reply Reply Quote 0
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