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    • OwenDundefined
      OwenD @RatRig0331
      last edited by OwenD

      @ratrig0331

      I believe the problem you are having is that I didn't allow for a probe that was offset to the other side of the extruder to mine.

      Try these files.
      I think it should sort it out.

      ;setDefaultProbePoints.g - to be called from config.g after Z probe configuration section and any time defaults need to be reset.
      
      var SafeZone = 10 ; probing won't be done closer than this amount from bed edge - adjust as required
      var defaultProbeSpacing = 50 ; default mesh grid spacing in mm - adjust as required
      
      ; shouldn't need to edit after here
      var MinReachableX = max(0,sensors.probes[0].offsets[0]) + var.SafeZone
      var MaxReachabeX = move.axes[0].max - abs(sensors.probes[0].offsets[0]) - var.SafeZone
      var MinReachableY =  max(0,sensors.probes[0].offsets[1]) + var.SafeZone
      var MaxReachabeY = move.axes[1].max - abs(sensors.probes[0].offsets[1]) - var.SafeZone
      
      M557 X{var.MinReachableX,var.MaxReachabeX} Y{var.MinReachableY,var.MaxReachabeY} S{var.defaultProbeSpacing}; define mesh grid
      ;echo "M557 X"^{var.MinReachableX}^","^{var.MaxReachabeX}, "Y"^{var.MinReachableY}^","^{var.MaxReachabeY}, "S"^{var.defaultProbeSpacing}
      if !exists(global.minProbeX)
      	global minProbeX = move.compensation.probeGrid.mins[0]
      else
      	set global.minProbeX = move.compensation.probeGrid.mins[0]
      
      if !exists(global.minProbeY)
      	global minProbeY = move.compensation.probeGrid.mins[1]
      else
      	set global.minProbeY = move.compensation.probeGrid.mins[1]
      
      if !exists(global.maxProbeX)
      	global maxProbeX = move.compensation.probeGrid.maxs[0]
      else
      	set global.maxProbeX = move.compensation.probeGrid.maxs[0]
      
      if !exists(global.maxProbeY)
      	global maxProbeY = move.compensation.probeGrid.maxs[1]
      else
      	set global.maxProbeX = move.compensation.probeGrid.maxs[1]
      
      

      revised mesh.g

      ;0:/sys/mesh.g
      ; run when G29 with no paramters is called.
      ; if this file not found G29 S0 will run
      var SafeZone = 3 ; safety margin for probing near edge.
      var MinSpace = 20 ; put default minimum spacing
      var MaxSpace = 60 ; put default maximum spacing
      
      ; these values are place holders aand will be calculated later
      var m557MinX = 40;  ; put your default here
      var m557MaxX = 180;  ; put your default here
      var m557MinY = 20;  ; put your default here
      var m557MaxY = 180;  ; put your default here
      var ProbeCenterX = 90 ; will be updated to probe centre of print
      var ProbeCenterY = 90 ; will be updated to probe centre of print
      var ProbeNumX = 8 ; put default number of probe points
      var ProbeNumY = 8 ; put default number probe points.
      
      
      var MaxProbePoints = max(floor(move.axes[0].max / var.MaxSpace),floor(move.axes[1].max / var.MaxSpace)) ; maximum points in either axis
      
      ;echo "Maximum allowed probe points is " ^ var.MaxProbePoints ^ " using max space of " ^ var.MaxSpace
      
      
      if exists(global.minProbeX)
      	if global.minProbeX < max(0,sensors.probes[0].offsets[0]) + var.SafeZone
      		echo "minProbeX (" ^ global.minProbeX ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[0] + var.SafeZone)
      		set global.minProbeX = max(0,sensors.probes[0].offsets[0]) + var.SafeZone
      	set var.m557MinX = global.minProbeX
      
      if exists(global.maxProbeX)
      	if global.maxProbeX < (global.minProbeX + (var.MinSpace*2))
      		set global.maxProbeX = (global.minProbeX + (var.MinSpace*2))
      	if global.maxProbeX > (move.axes[0].max - abs(sensors.probes[0].offsets[0]) - var.SafeZone)
      		echo "maxProbeX (" ^ global.maxProbeX ^ ") unreachable - reset to " ^ (move.axes[0].max - sensors.probes[0].offsets[0] - var.SafeZone)
      		set global.maxProbeX = move.axes[0].max - abs(sensors.probes[0].offsets[0]) - var.SafeZone
      	set var.m557MaxX = global.maxProbeX
      
      if exists(global.minProbeY)
      	if global.minProbeY < max(0,sensors.probes[0].offsets[1]) + var.SafeZone
      		echo "minProbeY (" ^ global.minProbeY ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[1] + var.SafeZone)
      		set global.minProbeY = max(0,sensors.probes[0].offsets[1]) + var.SafeZone
      	set var.m557MinY = global.minProbeY
      
      
      if exists(global.maxProbeY)
      	if global.maxProbeY < (global.minProbeY + (var.MinSpace*2))
      		set global.maxProbeY = (global.minProbeY + (var.MinSpace*2))
      	if global.maxProbeY > (move.axes[1].max - abs(sensors.probes[0].offsets[1]) - var.SafeZone)
      		echo "maxProbeY (" ^ global.maxProbeY ^ ") unreachable - reset to " ^ (move.axes[1].max - sensors.probes[0].offsets[1] - var.SafeZone)
      		set global.maxProbeY = (move.axes[1].max - abs(sensors.probes[0].offsets[1]) - var.SafeZone)
      	set var.m557MaxY = global.maxProbeY
      
      echo "Probing grid - X" ^ var.m557MinX ^ ":" ^ var.m557MaxX ^ " Y" ^ var.m557MinY ^ ":" ^ var.m557MaxY
      
      var MinProbesX = floor((var.m557MaxX - var.m557MinX) / var.MaxSpace)
      ;echo "Min Probes X is " ^ var.MinProbesX
      
      var MaxProbesX = floor((var.m557MaxX - var.m557MinX) / var.MinSpace)
      ;echo "Max Probes X is " ^ var.MaxProbesX
      
      set var.ProbeNumX = min(var.MaxProbePoints,var.MaxProbesX)
      
      var MinProbesY = floor((var.m557MaxY - var.m557MinY) / var.MaxSpace)
      ;echo "Min Probes Y is " ^ var.MinProbesY
      
      var MaxProbesY = floor((var.m557MaxY - var.m557MinY) / var.MinSpace)
      ;echo "Max Probes Y is " ^ var.MaxProbesY
      
      set var.ProbeNumY = min(var.MaxProbePoints,var.MaxProbesY)
      
      ; sanity check probe points
      if var.ProbeNumX<2
      	set var.ProbeNumX=2
      if var.ProbeNumY<2
      	set var.ProbeNumY=2
      
      if var.ProbeNumX > var.MaxProbePoints
      	set var.ProbeNumX = var.MaxProbePoints
      
      if var.ProbeNumY > var.MaxProbePoints
      	set var.ProbeNumY = var.MaxProbePoints
      
      if (var.ProbeNumX * var.ProbeNumY) > 441
      	if var.ProbeNumX > 21
      		set var.ProbeNumX = 21
      		echo "Too many X points - reduced to 21"
      	if var.ProbeNumY > 21
      		set var.ProbeNumY = 21
      		echo "Too many Y points - reduced to 21"
      	
      echo "Probing " ^ var.ProbeNumX ^ " points in X direction & " ^ var.ProbeNumY ^ " points in Y direction"
      
      ;check state of heaters
      var bedState = heat.heaters[0].state
      var bedActiveTemp = heat.heaters[0].active
      var bedStandbyTemp = heat.heaters[0].standby
      var nozzleState = heat.heaters[1].state
      M140 P0 S-276 ; turn off bed heater
      M568 P0 A0 ; turn off nozzle heater
      
      ; do probing
      set var.ProbeCenterX = (global.maxProbeX - ((global.maxProbeX - global.minProbeX)/2)) ; calculate centre point of probe area
      set var.ProbeCenterY = (global.maxProbeY - ((global.maxProbeY - global.minProbeY)/2)) ; calculate centre point of probe area
      echo "Setting Z datum point at X" ^ var.ProbeCenterX ^ " Y" ^ var.ProbeCenterY
      ; set Z = 0 to centre of probe area
      G1 X{var.ProbeCenterX- sensors.probes[0].offsets[0]} Y{var.ProbeCenterY- sensors.probes[0].offsets[1]} Z{sensors.probes[0].diveHeight+2} F3600
      G30
      echo "Mesh probing"
      M557 X{var.m557MinX,var.m557MaxX} Y{var.m557MinY,var.m557MaxY} P{var.ProbeNumX,var.ProbeNumY}
      if result != 0
      	abort "ERROR: could not create mesh" 
      else
      	G29 S0
      	if result != 0
      		abort "ERROR: Mesh probing failed"
      	else
      		echo "Mesh probing successful.   Loading mesh.."
      
      ; set Z = 0 to centre of probe area
      echo "Reset Z datum in mesh centre"
      G1 X{var.ProbeCenterX - sensors.probes[0].offsets[0]} Y{var.ProbeCenterY - sensors.probes[0].offsets[1]} Z{sensors.probes[0].diveHeight+2} F3600
      G30
      
      ; turn the heaters back on if needed
      if var.bedState != "off"
      	M140 S{var.bedActiveTemp} R{var.bedStandbyTemp}
      	if var.bedState="active"
      		M144 P0 S1 ; put bed on active temp
      	else
      		M144 P0 S0 ; put bed on standby temp
      if var.nozzleState	!= "off"
      	if var.nozzleState = "active"
      		M568 P0 A2 ; set nozzle to active
      	else
      		M568 P0 A1 ; set nozzle to standby
      
      1 Reply Last reply Reply Quote 1
      • dc42undefined
        dc42 administrators @RatRig0331
        last edited by dc42

        @ratrig0331 the minimum spacing between points allowed is 0.1mm in each of X and Y. "Spacing too small" means you have tried to specify a smaller spacing than that.

        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

        OwenDundefined 1 Reply Last reply Reply Quote 1
        • OwenDundefined
          OwenD @dc42
          last edited by

          @dc42 said in Only probe where the part will be printed:

          the minimum spacing between points allowed is 0.1mm in each of X and Y. "Spacing too small" means you have tried to specify a smaller spacing than that.

          In that case I'm at a bit of a loss how @RatRig0331 is getting that error using my code.
          It's early morning here (Australia) and I have to go to work, so I can't look at till I get home.
          @RatRig0331 Can you please un-comment all the lines in the mesh.g that show the calculations and post the output from the console.

          At the start I work out the maximum possible number of probes if a full bed was done using maxSpace.
          Later I use the object size to recalculate the number of probes also using maxSpacing.
          The lesser of these two numbers is used (or should be).

          There must be a fundamental flaw in my logic (at least with your bed size and probe configuration). 😕

          It also occurs to me that I haven't catered for deltas or printers where X0, Y0 is in the center of the bed.

          RatRig0331undefined 2 Replies Last reply Reply Quote 1
          • RatRig0331undefined
            RatRig0331 @OwenD
            last edited by

            @owend

            8/15/2022, 8:04:58 PM Error: M557: bad grid definition: Spacing too small
            8/15/2022, 8:04:26 PM Reset Z datum in mesh centre
            8/15/2022, 8:04:26 PM Mesh probing successful. Loading mesh..
            8/15/2022, 8:04:26 PM 36 points probed, min error -0.141, max error 0.093, mean -0.020, deviation 0.066
            Height map saved to file 0:/sys/heightmap.csv
            8/15/2022, 8:01:59 PM Mesh probing
            8/15/2022, 8:01:50 PM Setting Z datum point at X250.0000 Y250.0000
            8/15/2022, 8:01:50 PM Probing 6 points in X direction & 6 points in Y direction
            8/15/2022, 8:01:50 PM Probing grid - X183.907:316.093 Y188.907:311.093
            8/15/2022, 8:01:32 PM Leadscrew adjustments made: -0.014 0.008 0.009, points used 3, (mean, deviation) before (0.001, 0.010) after (-0.000, 0.000)
            8/15/2022, 8:01:12 PM Leadscrew adjustments made: 0.015 0.022 0.001, points used 3, (mean, deviation) before (0.014, 0.008) after (-0.000, 0.000)
            8/15/2022, 8:00:52 PM Leadscrew adjustments made: 0.102 0.033 -0.002, points used 3, (mean, deviation) before (0.046, 0.040) after (0.000, 0.000)
            8/15/2022, 8:00:32 PM Leadscrew adjustments made: 0.503 0.279 0.452, points used 3, (mean, deviation) before (0.404, 0.087) after (-0.000, 0.000)
            8/15/2022, 7:58:35 PM M32 "0:/gcodes/First_Layer_Test_0.2mm_PLA_10mhhhhhhhhhhhhhh.gcode"
            File 0:/gcodes/First_Layer_Test_0.2mm_PLA_10mhhhhhhhhhhhhhh.gcode selected for printing

            1 Reply Last reply Reply Quote 0
            • RatRig0331undefined
              RatRig0331 @OwenD
              last edited by

              @owend

              8/15/2022, 8:17:42 PM Error: M557: bad grid definition: Spacing too small
              8/15/2022, 8:17:10 PM Reset Z datum in mesh centre
              8/15/2022, 8:17:10 PM Mesh probing successful. Loading mesh..
              8/15/2022, 8:17:10 PM 36 points probed, min error -0.105, max error 0.079, mean -0.005, deviation 0.044
              Height map saved to file 0:/sys/heightmap.csv
              8/15/2022, 8:14:43 PM Mesh probing
              8/15/2022, 8:14:34 PM Setting Z datum point at X250.0000 Y250.0000
              8/15/2022, 8:14:34 PM Probing 6 points in X direction & 6 points in Y direction
              8/15/2022, 8:14:34 PM Max Probes Y is 6
              8/15/2022, 8:14:34 PM Min Probes Y is 2
              8/15/2022, 8:14:34 PM Max Probes X is 6
              8/15/2022, 8:14:34 PM Min Probes X is 2
              8/15/2022, 8:14:34 PM Probing grid - X183.907:316.093 Y188.907:311.093
              8/15/2022, 8:14:34 PM Maximum allowed probe points is 8 using max space of 60
              8/15/2022, 8:14:16 PM Leadscrew adjustments made: 0.002 0.008 0.006, points used 3, (mean, deviation) before (0.005, 0.002) after (0.000, 0.000)
              8/15/2022, 8:13:56 PM Leadscrew adjustments made: 0.016 0.016 0.011, points used 3, (mean, deviation) before (0.015, 0.002) after (0.000, 0.000)
              8/15/2022, 8:13:36 PM Leadscrew adjustments made: 0.168 0.055 0.022, points used 3, (mean, deviation) before (0.084, 0.057) after (-0.000, 0.000)
              8/15/2022, 8:13:16 PM Leadscrew adjustments made: 0.413 0.322 0.388, points used 3, (mean, deviation) before (0.372, 0.035) after (0.000, 0.000)
              8/15/2022, 8:12:01 PM M32 "0:/gcodes/First_Layer_Test_0.2mm_PLA_10mhhhhhhhhhhhhhh.gcode"
              File 0:/gcodes/First_Layer_Test_0.2mm_PLA_10mhhhhhhhhhhhhhh.gcode selected for printing

              OwenDundefined 1 Reply Last reply Reply Quote 0
              • OwenDundefined
                OwenD @RatRig0331
                last edited by

                @ratrig0331
                The M557 that is causing the error seems to be well after all the stuff I did.
                Check for an M557 somewhere else in your slicer start gcode

                RatRig0331undefined 2 Replies Last reply Reply Quote 0
                • RatRig0331undefined
                  RatRig0331 @OwenD
                  last edited by

                  @owend

                  your right sorry it was in my start code purge line for some reason thank you so much for your time and patients with me this is all still vary new to me

                  8/15/2022, 9:22:31 PM Reset Z datum in mesh centre
                  8/15/2022, 9:22:31 PM Mesh probing successful. Loading mesh..
                  8/15/2022, 9:22:31 PM 36 points probed, min error -0.174, max error 0.083, mean -0.012, deviation 0.067
                  Height map saved to file 0:/sys/heightmap.csv
                  8/15/2022, 9:20:04 PM Mesh probing
                  8/15/2022, 9:19:56 PM Setting Z datum point at X250.0000 Y250.0000
                  8/15/2022, 9:19:55 PM Probing 6 points in X direction & 6 points in Y direction
                  8/15/2022, 9:19:55 PM Max Probes Y is 6
                  8/15/2022, 9:19:55 PM Min Probes Y is 2
                  8/15/2022, 9:19:55 PM Max Probes X is 6
                  8/15/2022, 9:19:55 PM Min Probes X is 2
                  8/15/2022, 9:19:55 PM Probing grid - X183.907:316.093 Y188.907:311.093
                  8/15/2022, 9:19:55 PM Maximum allowed probe points is 8 using max space of 60
                  8/15/2022, 9:19:55 PM Leadscrew adjustments made: -0.003 0.011 0.016, points used 3, (mean, deviation) before (0.007, 0.007) after (-0.000, 0.000)
                  8/15/2022, 9:19:34 PM Leadscrew adjustments made: 0.006 -0.003 0.004, points used 3, (mean, deviation) before (0.002, 0.003) after (0.000, 0.000)
                  8/15/2022, 9:19:14 PM Leadscrew adjustments made: 0.046 0.021 0.031, points used 3, (mean, deviation) before (0.032, 0.009) after (-0.000, 0.000)
                  8/15/2022, 9:18:54 PM Leadscrew adjustments made: -0.011 0.368 0.277, points used 3, (mean, deviation) before (0.213, 0.149) after (-0.000, 0.000)

                  1 Reply Last reply Reply Quote 0
                  • RatRig0331undefined
                    RatRig0331 @OwenD
                    last edited by

                    @owend

                    sorry one more question so far every time the start code hits your lines the hotend and bed turn off during the mesh than back on after. i tryed moving some things around but it still turns off all heaters during the mesh. here is my full start code

                    BED_TEMP=[first_layer_bed_temperature]
                    G90 ; use absolute coordinates
                    M83 ; extruder relative mode
                    M140 S[first_layer_bed_temperature] ; set final bed temp
                    M104 S150 ; set temporary nozzle temp to prevent oozing during homing and auto bed leveling
                    G4 S10 ; allow partial nozzle warmup
                    G28 ; home all axis
                    G1 Z50 F240
                    G1 X50 Y50 F3000
                    M116 ; Wait for all temps to stabilise
                    G32; (TRIM BED)
                    G32; (TRIM BED)
                    G32; (TRIM BED)
                    G32; (TRIM BED)

                    ;;;;;;auto probe print area only;;;;;;

                    set global.minProbeX = {first_layer_print_min[0]}
                    set global.maxProbeX = {first_layer_print_max[0]}
                    set global.minProbeY = {first_layer_print_min[1]}
                    set global.maxProbeY = {first_layer_print_max[1]}
                    M561 ; clear any bed transform
                    M140 S[first_layer_bed_temperature] ; set final bed temp
                    M104 S150 ; set temporary nozzle temp to prevent oozing during homing and auto bed leveling
                    G4 S10 ; allow partial nozzle warmup
                    G29 ; do mesh for printed area
                    G29 S1 ; load small mesh
                    G01 X0 Y{"{move.axes[1].max}"} Z0.6 F1500 ; Move to back corner while heating
                    M568 P{current_extruder} R{"{heat.coldExtrudeTemperature+5}"} S{first_layer_temperature[current_extruder]} A2 ; (set standby and active temperatures for active tool. Standby is 5 degrees above cold extrude temp )
                    M116 ; Wait for all temps to stabilise

                    ;;;;final temp and purge line;;;;

                    M104 S{first_layer_temperature[initial_extruder]+extruder_temperature_offset[initial_extruder]} ; set final nozzle temp
                    M190 S[first_layer_bed_temperature] ; wait for bed temp to stabilize
                    M109 S{first_layer_temperature[initial_extruder]+extruder_temperature_offset[initial_extruder]} ; wait for nozzle temp to stabilize
                    G4 S10 ; allow partial nozzle warmup
                    G1 Z2.0 F3000; (MOVE Z AXIS UP LITTLE)
                    G1 X0.1 Y20 Z0.35 F5000.0; (MOVE TO PURDGE START)
                    G1 X0.1 Y200.0 Z0.35 F1500.0 E25; (DRAW FIRST LINE)
                    G1 X0.4 Y200.0 Z0.35 F5000.0; (MOVE TO THE SECOND LINE)
                    G1 X0.4 Y20.0 Z0.35 F1500.0 E30; (DRAW SECOND LINE)
                    G92 E0; (EXTRUDER RESET)

                    OwenDundefined 2 Replies Last reply Reply Quote 0
                    • OwenDundefined
                      OwenD @RatRig0331
                      last edited by

                      @ratrig0331
                      The turning off of the heaters is deliberate and is done in mesh.g
                      I find that the accuracy of my bltouch suffers if they are on when probing
                      I run a 240v bed.
                      I'll have a look later and add an option to not turn off heaters.

                      dc42undefined 1 Reply Last reply Reply Quote 0
                      • dc42undefined
                        dc42 administrators @OwenD
                        last edited by

                        @owend you can turn off heaters temporarily during probing by using the B1 parameter in your M558 command.

                        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

                        OwenDundefined 1 Reply Last reply Reply Quote 0
                        • OwenDundefined
                          OwenD @dc42
                          last edited by

                          @dc42
                          Roger that..
                          That makes that section of code superfluous.
                          Does it turn off the bed heater as well?

                          dc42undefined 1 Reply Last reply Reply Quote 0
                          • OwenDundefined
                            OwenD @RatRig0331
                            last edited by OwenD

                            @ratrig0331 said in Only probe where the part will be printed:

                            You can remove these lines in your slicer as you have set your temps elsewhere in your start code.

                            M568 P{current_extruder} R{"{heat.coldExtrudeTemperature+5}"} S{first_layer_temperature[current_extruder]} A2 ; (set standby and active temperatures for active tool.  Standby is 5 degrees above cold extrude temp )
                            M116 ; Wait for all temps to stabilise
                            

                            This version removes all the code related to heating from mesh.g

                            ;0:/sys/mesh.g
                            ; run when G29 with no paramters is called.
                            ; if this file not found G29 S0 will run
                            var SafeZone = 3 ; safety margin for probing near edge.
                            var MinSpace = 20 ; put default minimum spacing
                            var MaxSpace = 60 ; put default maximum spacing
                            
                            ; these values are place holders aand will be calculated later
                            var m557MinX = 40;  ; put your default here
                            var m557MaxX = 180;  ; put your default here
                            var m557MinY = 20;  ; put your default here
                            var m557MaxY = 180;  ; put your default here
                            var ProbeCenterX = 90 ; will be updated to probe centre of print
                            var ProbeCenterY = 90 ; will be updated to probe centre of print
                            var ProbeNumX = 8 ; put default number of probe points
                            var ProbeNumY = 8 ; put default number probe points.
                            
                            
                            var MaxProbePoints = max(floor(move.axes[0].max / var.MaxSpace),floor(move.axes[1].max / var.MaxSpace)) ; maximum points in either axis
                            
                            ;echo "Maximum allowed probe points is " ^ var.MaxProbePoints ^ " using max space of " ^ var.MaxSpace
                            
                            
                            if exists(global.minProbeX)
                            	if global.minProbeX < max(0,sensors.probes[0].offsets[0]) + var.SafeZone
                            		echo "minProbeX (" ^ global.minProbeX ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[0] + var.SafeZone)
                            		set global.minProbeX = max(0,sensors.probes[0].offsets[0]) + var.SafeZone
                            	set var.m557MinX = global.minProbeX
                            
                            if exists(global.maxProbeX)
                            	if global.maxProbeX < (global.minProbeX + (var.MinSpace*2))
                            		set global.maxProbeX = (global.minProbeX + (var.MinSpace*2))
                            	if global.maxProbeX > (move.axes[0].max - abs(sensors.probes[0].offsets[0]) - var.SafeZone)
                            		echo "maxProbeX (" ^ global.maxProbeX ^ ") unreachable - reset to " ^ (move.axes[0].max - sensors.probes[0].offsets[0] - var.SafeZone)
                            		set global.maxProbeX = move.axes[0].max - abs(sensors.probes[0].offsets[0]) - var.SafeZone
                            	set var.m557MaxX = global.maxProbeX
                            
                            if exists(global.minProbeY)
                            	if global.minProbeY < max(0,sensors.probes[0].offsets[1]) + var.SafeZone
                            		echo "minProbeY (" ^ global.minProbeY ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[1] + var.SafeZone)
                            		set global.minProbeY = max(0,sensors.probes[0].offsets[1]) + var.SafeZone
                            	set var.m557MinY = global.minProbeY
                            
                            
                            if exists(global.maxProbeY)
                            	if global.maxProbeY < (global.minProbeY + (var.MinSpace*2))
                            		set global.maxProbeY = (global.minProbeY + (var.MinSpace*2))
                            	if global.maxProbeY > (move.axes[1].max - abs(sensors.probes[0].offsets[1]) - var.SafeZone)
                            		echo "maxProbeY (" ^ global.maxProbeY ^ ") unreachable - reset to " ^ (move.axes[1].max - sensors.probes[0].offsets[1] - var.SafeZone)
                            		set global.maxProbeY = (move.axes[1].max - abs(sensors.probes[0].offsets[1]) - var.SafeZone)
                            	set var.m557MaxY = global.maxProbeY
                            
                            echo "Probing grid - X" ^ var.m557MinX ^ ":" ^ var.m557MaxX ^ " Y" ^ var.m557MinY ^ ":" ^ var.m557MaxY
                            
                            var MinProbesX = floor((var.m557MaxX - var.m557MinX) / var.MaxSpace)
                            ;echo "Min Probes X is " ^ var.MinProbesX
                            
                            var MaxProbesX = floor((var.m557MaxX - var.m557MinX) / var.MinSpace)
                            ;echo "Max Probes X is " ^ var.MaxProbesX
                            
                            set var.ProbeNumX = min(var.MaxProbePoints,var.MaxProbesX)
                            
                            var MinProbesY = floor((var.m557MaxY - var.m557MinY) / var.MaxSpace)
                            ;echo "Min Probes Y is " ^ var.MinProbesY
                            
                            var MaxProbesY = floor((var.m557MaxY - var.m557MinY) / var.MinSpace)
                            ;echo "Max Probes Y is " ^ var.MaxProbesY
                            
                            set var.ProbeNumY = min(var.MaxProbePoints,var.MaxProbesY)
                            
                            ; sanity check probe points
                            if var.ProbeNumX<2
                            	set var.ProbeNumX=2
                            if var.ProbeNumY<2
                            	set var.ProbeNumY=2
                            
                            if var.ProbeNumX > var.MaxProbePoints
                            	set var.ProbeNumX = var.MaxProbePoints
                            
                            if var.ProbeNumY > var.MaxProbePoints
                            	set var.ProbeNumY = var.MaxProbePoints
                            
                            if (var.ProbeNumX * var.ProbeNumY) > 441
                            	if var.ProbeNumX > 21
                            		set var.ProbeNumX = 21
                            		echo "Too many X points - reduced to 21"
                            	if var.ProbeNumY > 21
                            		set var.ProbeNumY = 21
                            		echo "Too many Y points - reduced to 21"
                            	
                            echo "Probing " ^ var.ProbeNumX ^ " points in X direction & " ^ var.ProbeNumY ^ " points in Y direction"
                            
                            
                            ; do probing
                            set var.ProbeCenterX = (global.maxProbeX - ((global.maxProbeX - global.minProbeX)/2)) ; calculate centre point of probe area
                            set var.ProbeCenterY = (global.maxProbeY - ((global.maxProbeY - global.minProbeY)/2)) ; calculate centre point of probe area
                            echo "Setting Z datum point at X" ^ var.ProbeCenterX ^ " Y" ^ var.ProbeCenterY
                            ; set Z = 0 to centre of probe area
                            G1 X{var.ProbeCenterX- sensors.probes[0].offsets[0]} Y{var.ProbeCenterY- sensors.probes[0].offsets[1]} Z{sensors.probes[0].diveHeight+2} F3600
                            G30
                            echo "Mesh probing"
                            M557 X{var.m557MinX,var.m557MaxX} Y{var.m557MinY,var.m557MaxY} P{var.ProbeNumX,var.ProbeNumY}
                            if result != 0
                            	abort "ERROR: could not create mesh" 
                            else
                            	G29 S0
                            	if result != 0
                            		abort "ERROR: Mesh probing failed"
                            	else
                            		echo "Mesh probing successful.   Loading mesh.."
                            
                            ; set Z = 0 to centre of probe area
                            echo "Reset Z datum in mesh centre"
                            G1 X{var.ProbeCenterX - sensors.probes[0].offsets[0]} Y{var.ProbeCenterY - sensors.probes[0].offsets[1]} Z{sensors.probes[0].diveHeight+2} F3600
                            G30
                            
                            
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                            • OwenDundefined
                              OwenD
                              last edited by OwenD

                              @RatRig0331

                              While I was thinking about how to make these macros "universal" to suit all sorts of configurations, it occurred to me that they had, over time, grown ever more complicated with little benefit.
                              Bed sizes and the probe positions don't tend to change after all.

                              I have therefore decided to simplify things.

                              I still call "setDefaultProbePoints.g" from config.g and anywhere else I might want to set the mesh for the entire bed.
                              Rather than me trying to calculate the area that can be probed, you just enter your M557 just as you would normally do in config.g

                              ;setDefaultProbePoints.g
                              M557 X10:470 Y10:470 P6 ; set values as you would normally do in config.g
                              

                              In superslicer, rather than call G29, I call mesh.g using M98, but pass the parameters for the min/max print values and the distance between probe points
                              A=xMin of print area
                              B=xMax of print area
                              C=yMin of print area
                              D=yMax of print area
                              N=distance between probe points (equivalent to S parameter in M557)

                              M98 P"0:/sys/mesh.g" A{first_layer_print_min[0]} B{first_layer_print_max[0]} C{first_layer_print_min[1]} D{first_layer_print_max[1]} N30 ; set N to your desired distance between points
                              G29 S1 ; load small mesh
                              

                              In mesh.g I check if all those parameters have been passed.
                              If they have, I do the small mesh.
                              If they haven't I reload the defaults and probe the full bed.
                              Therefore if you send G29 or select mesh probing in DWC it will do the entire bed even if you forget to reset the defaults.

                              ;mesh.g
                              M98 P"setDefaultProbePoints.g"
                              if (exists(param.A) && exists(param.B) && exists(param.C) && exists(param.D) && exists(param.N))
                              	M557 X{max(move.compensation.probeGrid.mins[0],param.A),min(move.compensation.probeGrid.maxs[0],param.B)} Y{max(move.compensation.probeGrid.mins[1],param.C),min(move.compensation.probeGrid.maxs[1] ,param.D)} S{param.N}
                              	if result != 0
                              		abort "Invalid M557 parameters"
                              
                              G29 S0
                              

                              If you wanted to set the number of probe points rather than the distance between them just change S{param.N} to P{param.N} in the M557 line in mesh.g

                              1 Reply Last reply Reply Quote 2
                              • oozeBotundefined
                                oozeBot
                                last edited by

                                This might be useful: https://forum.duet3d.com/topic/29647/you-down-with-opp-oozebot-post-processor

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                                • dc42undefined
                                  dc42 administrators @OwenD
                                  last edited by

                                  @owend said in Only probe where the part will be printed:

                                  @dc42
                                  Roger that..
                                  That makes that section of code superfluous.
                                  Does it turn off the bed heater as well?

                                  Yes, it turns all heaters off. In the past it's been the bed heater that causes most of the problems for Z probes, however I suspect that with Revo and similar hot ends the hot end heater might affect Z probes too because of the higher magnetic field they are likely to produce.

                                  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

                                  1 Reply Last reply Reply Quote 0
                                  • RatRig0331undefined
                                    RatRig0331 @OwenD
                                    last edited by

                                    @owend I’m getting some mix results with the bed mesh either works out great or works out horrible with driving my nozzle right into the bed I don’t know is doing a 3 point axis bed level is messing with the bed mesh or the last z offset probe touch

                                    OwenDundefined 1 Reply Last reply Reply Quote 0
                                    • OwenDundefined
                                      OwenD @RatRig0331
                                      last edited by

                                      @ratrig0331
                                      There's nothing in the code which can cause intermittent faults such as that you describe.
                                      The problem is either wiring related, electrical interference , or a faulty BlTouch.
                                      You can check if the BlTouch is in an error state or already deployed using the object model, but this only serves to allow you to cancel the process.
                                      You need to find the root cause.
                                      You need to provide details of what is happening exactly. What lights are on the BlTouch. What messages appear in DWC
                                      It's probably better to start a new thread.

                                      RatRig0331undefined 1 Reply Last reply Reply Quote 0
                                      • RatRig0331undefined
                                        RatRig0331 @OwenD
                                        last edited by

                                        @owend I have a Theory to why it’s crashing. My 3 point bed leveling before the new smaller mesh on my 500x500mm bed is just too much of a difference from the outter most points of the bed level to the new inner smaller point bed mesh. I manually moved the three probe points much closer the the center and the mesh looks quite a bit better as well as flatter with less extreams. My z changed quite a bit with this new bed level as well by almost .45mm.

                                        Is there a way to auto ajust the bed level points to be in the same area of the auto bed mesh?

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                                        • OwenDundefined
                                          OwenD
                                          last edited by

                                          @ratrig0331

                                          What you're describing doesn't sound right to me.
                                          I suggest you study this page
                                          https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_auto_levelling
                                          To get your 3 point levelling right.
                                          The probe points must be near the lead screws.

                                          RatRig0331undefined 2 Replies Last reply Reply Quote 0
                                          • RatRig0331undefined
                                            RatRig0331 @OwenD
                                            last edited by

                                            @owend changing my bed.g to this seems to have helped

                                            M561 ; clear any bed transform
                                            G30 P0 X10 Y30 Z-99999 ; probe near leadscrew 1
                                            G30 P1 X60 Y80 Z-99999 ; probe near leadscrew 1
                                            G30 P2 X110 Y130 Z-99999 ; probe near leadscrew 1
                                            G30 P3 X160 Y180 Z-99999 ; probe near leadscrew 1
                                            G30 P4 X240 Y480 Z-99999 ; probe near leadscrew 2
                                            G30 P5 X240 Y430 Z-99999 ; probe near leadscrew 2
                                            G30 P6 X240 Y380 Z-99999 ; probe near leadscrew 2
                                            G30 P7 X240 Y330 Z-99999 ; probe near leadscrew 2
                                            G30 P8 X470 Y30 Z-99999 ; probe near leadscrew 3
                                            G30 P9 X420 Y80 Z-99999 ; probe near leadscrew 3
                                            G30 P10 X370 Y130 Z-99999 ; probe near leadscrew 3
                                            G30 P11 X320 Y180 Z-99999 S3 ; probe near leadscrew 3 and calibrate 3 motors

                                            M280 P0 S160 ; clear and reset BL touch
                                            G1 Z10 F300
                                            G29 S1 ; probe the bed and enable compensation

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