diff --git a/SD-image/sys-CoreXY/config.g b/SD-image/sys-CoreXY/config.g
index ebae71c..e8ccd26 100644
--- a/SD-image/sys-CoreXY/config.g
+++ b/SD-image/sys-CoreXY/config.g
@@ -24,6 +24,7 @@ M569 P4 S1							; Drive 4 goes forwards
 ; If you use an endstop switch for Z homing, change Z0 to Z1 in the following line, and see also M558 command later in this file
 M574 X1 Y1 Z0 S1					; set endstop configuration (X and Y and endstops only, at low end, active high)
 M667 S1								; set CoreXY mode
+M92 X80 Y80 Z4000					; Set axis steps/mm
 M906 X800 Y800 Z800 E800            ; Set motor currents (mA)
 M201 X800 Y800 Z15 E1000            ; Accelerations (mm/s^2)
 M203 X15000 Y15000 Z100 E3600       ; Maximum speeds (mm/min)
diff --git a/SD-image/sys-Huxley/config.g b/SD-image/sys-Huxley/config.g
index f711e68..074a687 100644
--- a/SD-image/sys-Huxley/config.g
+++ b/SD-image/sys-Huxley/config.g
@@ -14,6 +14,7 @@ M83									; ...but relative extruder moves
 M574 X0 Y1 Z0 S1					; set endstop configuration (Y endstop only, at low end, active high)
 M569 P0 S1							; Reverse the X motor
 M569 P3 S0							; Don't reverse the extruder motor
+M92 X87.4890 Y87.4890 Z4000			; Set axis steps/mm
 M906 X600 Y600 Z600 E600			; Set motor currents (mA)
 M305 P0 T100000 R4700               ; bed thermistor is 100K with 4K7 series resistor
 M305 P1 R4700                       ; first nozzle thermistor has 4K7 series resistor
diff --git a/SD-image/sys-Ormerod1/config.g b/SD-image/sys-Ormerod1/config.g
index b76a765..61b38d2 100644
--- a/SD-image/sys-Ormerod1/config.g
+++ b/SD-image/sys-Ormerod1/config.g
@@ -14,6 +14,7 @@ G21                                 ; Work in millimetres
 G90                                 ; Send absolute coordinates...
 M83                                 ; ...but relative extruder moves
 M574 X0 Y2 Z0 S1					; set endstop configuration (Y endstop only, at high end, active high)
+M92 X87.4890 Y87.4890 Z4000			; Set axis steps/mm
 M906 X800 Y1000 Z800 E800           ; Set motor currents (mA)
 M563 P0 D0 H1                       ; Define tool 0
 G10 P0 S0 R0                        ; Set tool 1 operating and standby temperatures
diff --git a/SD-image/sys-Ormerod2/config.g b/SD-image/sys-Ormerod2/config.g
index e469d8f..9e6f072 100644
--- a/SD-image/sys-Ormerod2/config.g
+++ b/SD-image/sys-Ormerod2/config.g
@@ -14,6 +14,7 @@ G21                                 ; Work in millimetres
 G90                                 ; Send absolute coordinates...
 M83                                 ; ...but relative extruder moves
 M574 X0 Y1 Z0 S1					; set endstop configuration (Y endstop only, at low end, active high)
+M92 X87.4890 Y87.4890 Z4000			; Set axis steps/mm
 M906 X800 Y1000 Z800 E800           ; Set motor currents (mA)
 M563 P0 D0 H1                       ; Define tool 0
 G10 P0 S0 R0                        ; Set tool 0 operating and standby temperatures