Fix and improve bed sensing

Fixing:
* bed screws location
* bed screws order
* X max 510 -> 500

Improvements:
* Probing points
* Home all speed
* Probing speed (decreased speed for increased accuracy)

bed.g

@@ -2,12 +2,13 @@
 ; so if G31 P500 X-30 Y-15 Z1.7 then first probe will be at
 ; X30 Y20 (when G30 P0 X0 Y5)
 
-M280 P0 S160 ; clear and reset BL touch
+
 M561 ; clear any bed transform
 
-G30 P0 X25 Y25 Z-99999 ; probe near a leadscrew
+G30 P0 X20 Y20 Z-99999 ; probe near a leadscrew
-G30 P1 X250 Y475 Z-99999 ; probe near a leadscrew
+G30 P1 X250 Y480 Z-99999 ; probe near a leadscrew
-G30 P2 X475 Y25 Z-99999 S3 ; probe near a leadscrew and calibrate 3 motors
+G30 P2 X480 Y20 Z-99999 S3 ; probe near a leadscrew and calibrate 3 motors
 
-G29  ; probe the bed and enable compensation
+M280 P0 S160 ; clear and reset BL touch
+;G29  ; probe the bed and enable compensation
 

config.g

@@ -27,7 +27,7 @@ M84 S30                                            ; Set idle timeout
 
 ; Axis Limits
 M208 X0 Y0 Z0 S1                                   ; set axis minima
-M208 X510 Y500 Z500 S0                             ; set axis maxima
+M208 X500 Y500 Z500 S0                             ; set axis maxima
 
 ; Endstops
 M574 X1 S1 P"io2.in"                               ; configure active-high endstop
@@ -36,14 +36,15 @@ M574 Y2 S1 P"io1.in"                               ; configure active-high endst
 
 ; Z-Probe
 M950 S0 C"io7.out"                                 ; create servo pin 0 for BLTouch
-M558 P9 C"^io7.in" H3 F500 T12000                  ; set Z probe type to bltouch and the dive height + speeds
+M558 P9 C"^io7.in" H3 F250 T12000                  ; set Z probe type to bltouch and the dive height + speeds
 ;; Pay special attention to the values bellow on G31, the Z value needs to be validated for your printer
 ;; Start with something like 0.5
 ;; Documentation available: https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe
-G31 P500 X-28 Y-13 Z2.225                          ; set Z probe trigger value, offset and trigger height
+G31 P500 X-28 Y-13 Z2.210                          ; set Z probe trigger value, offset and trigger height
 ;;
-M671 X-4.5:250:504.5 Y-4.52:505:-4.52 S5           ; define positions of Z leadscrews or bed levelling screws
+M671 X506.5:250:-2.5 Y0:508.5:0 S6                 ; define positions of Z leadscrews or bed levelling screws
-M557 X25:475 Y25:475 P10                           ; define 10x10 mesh grid
+
+M557 X25:475 Y25:475 P15                           ; define 15x15 mesh grid
 
 ; Heaters
 ;; BED

homeall.g

@@ -2,19 +2,23 @@
 ; called to home all axes
 ;
 
+; BLTouch
+M280 P0 S160           ; Precautionary alarm release
+M280 P0 S90            ; Ensure the pin is raised
+;
 M280 P0 S160            ; Reset probe
 G91                     ; relative positioning
 G1 H2 Z5 F6000          ; lift Z relative to current position
-G1 H1 X-625 Y625 F1800  ; move quickly to X and Y axis endstops and stop there (first pass)
+G1 H1 X-625 Y625 F3600  ; move quickly to X and Y axis endstops and stop there (first pass)
-G1 H1 X-625 F900        ; move quickly to X axis endstops and stop there (first pass)
+G1 H1 X-625 F1800       ; move quickly to X axis endstops and stop there (first pass)
-G1 H1 Y625 F900         ; move quickly to Y axis endstops and stop there (first pass)
+G1 H1 Y625 F1800         ; move quickly to Y axis endstops and stop there (first pass)
-G1 H2 X5 Y-10 F1800     ; go back a few mm
+G1 H2 X20 Y-20 F6000     ; go back a few mm
 G1 H1 X-625 Y625 F256   ; move slowly to X and Y axis endstops once more (second pass)
 G1 H1 X-625 F256        ; move slowly to X axis endstops once more (second pass)
 G1 H1 Y625 F256         ; move slowly to Y axis endstops once more (second pass)
 
 G90                     ; absolute positioning
-G1 X250 Y250 F10000     ; go to first probe point
+G1 X275 Y250 F10000     ; go to first probe point
 G30                     ; home Z by probing the bed
 
 G91                     ; relative positioning

homex.g

@@ -7,6 +7,6 @@ G1 H2 Z2 F10800   ; lift Z relative to current position
 G1 H1 X-625 F3600 ; move quickly to X axis endstop and stop there (first pass)
 G1 H2 X5 F6000    ; go back a few mm
 G1 H1 X-625 F360  ; move slowly to X axis endstop once more (second pass)
-G1 H2 Z-2 F10800  ; lower Z again
+;G1 H2 Z-2 F10800  ; lower Z again
 G90               ; absolute positioning
 G1 X10 F6000      ; move forward 10mm 

homey.g

@@ -7,6 +7,6 @@ G1 H2 Z2 F10800   ; lift Z relative to current position
 G1 H1 Y625 F3600  ; move quickly to Y axis endstop and stop there (first pass)
 G1 Y-10 F6000     ; go back a few mm
 G1 H1 Y625 F360   ; move slowly to Y axis endstop once more (second pass)
-G1 H2 Z-2 F10800  ; lower Z again
+;G1 H2 Z-2 F10800  ; lower Z again
 G90               ; absolute positioning
 G1 Y-10 F6000     ; move forward 10 mm

homez.g

@@ -6,7 +6,7 @@ M280 P0 S160        ; Reset probe
 G91                 ; relative positioning
 G1 H2 Z5 F10800     ; lift Z relative to current position
 G90                 ; absolute positioning
-G1 X250 Y250 F10800 ; go to first probe point
+G1 X275 Y250 F10800 ; go to first probe point
 G30                 ; home Z by probing the bed
 
 ; Uncomment the following lines to lift Z after probing

macros/Calibration/Reset BLTouch.g

@@ -0,0 +1 @@
+M280 P0 S160 ; clear and reset BL touch