diff --git a/resources/definitions/mingda_d3pro.def.json b/resources/definitions/mingda_d3pro.def.json
new file mode 100644
index 0000000000..63c9061fa2
--- /dev/null
+++ b/resources/definitions/mingda_d3pro.def.json
@@ -0,0 +1,21 @@
+{
+    "name": "MINGDA D3/Pro",
+    "version": 2,
+    "inherits": "mingda_base",
+    "overrides": {
+        "machine_name": { "default_value": "MINGDA D3/Pro" },
+        "machine_width": { "default_value": 320 },
+        "machine_depth": { "default_value": 320 },
+        "machine_height": { "default_value": 400 },
+        "gantry_height": { "value": 25 }
+		
+        
+
+    },
+    "metadata": {
+        "quality_definition": "mingda_base",
+        "visible": true,
+       "platform": "mingda_rock3_base.stl",
+        "platform_offset": [ -179, -108, 150]
+    }
+}
diff --git a/resources/definitions/mingda_d4pro.def.json b/resources/definitions/mingda_d4pro.def.json
new file mode 100644
index 0000000000..0cff777d2d
--- /dev/null
+++ b/resources/definitions/mingda_d4pro.def.json
@@ -0,0 +1,20 @@
+{
+    "name": "MINGDA D4 Pro",
+    "version": 2,
+    "inherits": "mingda_base",
+    "overrides": {
+        "machine_name": { "default_value": "MINGDA D4 Pro" },
+		"machine_start_gcode": { "default_value": "G28 ; home all axes\n G29; ABL\n M117 Purge extruder\n G92 E0 ; reset extruder\n G1 Z1.0 F3000 ; move z up little to prevent scratching of surface\n G1 X2 Y20 Z0.3 F5000.0 ; move to start-line position\n G1 X2 Y200.0 Z0.3 F1500.0 E15 ; draw 1st line\n G1 X2 Y200.0 Z0.4 F5000.0 ; move to side a little\n G1 X2 Y20 Z0.4 F1500.0 E30 ; draw 2nd line\n G92 E0 ; reset extruder\n G1 Z1.0 F3000 ; move z up little to prevent scratching of surface"},
+        "machine_width": { "default_value": 420 },
+        "machine_depth": { "default_value": 420 },
+        "machine_height": { "default_value": 400 },
+        "gantry_height": { "value": 25 }
+
+    },
+    "metadata": {
+        "quality_definition": "mingda_base",
+        "visible": true,
+        "platform": "mingda_d4pro_base.stl",
+        "platform_offset": [ -177, -140, 170]
+    }
+}
\ No newline at end of file
diff --git a/resources/definitions/mingda_rock3.def.json b/resources/definitions/mingda_rock3.def.json
new file mode 100644
index 0000000000..70254490b2
--- /dev/null
+++ b/resources/definitions/mingda_rock3.def.json
@@ -0,0 +1,19 @@
+{
+    "name": "MINGDA Rock3/Pro",
+    "version": 2,
+    "inherits": "mingda_base",
+    "overrides": {
+        "machine_name": { "default_value": "MINGDA Rock3/Pro" },
+        "machine_width": { "default_value": 320 },
+        "machine_depth": { "default_value": 320 },
+        "machine_height": { "default_value": 400 },
+        "gantry_height": { "value": 25 }
+
+    },
+    "metadata": {
+        "quality_definition": "mingda_base",
+        "visible": true,
+        "platform": "mingda_rock3_base.stl",
+        "platform_offset": [ -179, -108, 150]
+    }
+}