diff --git a/script/camtool.py b/script/camtool.py
index ff2ace7..d527bf6 100644
--- a/script/camtool.py
+++ b/script/camtool.py
@@ -24,7 +24,6 @@ class CamToolImage(ReadableMatrix):
         return self._height
         
 
-
 class CamTool(DeviceBase):
     def __init__(self, name, prefix = "cam:", latch = False):
         DeviceBase.__init__(self, name)
@@ -47,10 +46,17 @@ class CamTool(DeviceBase):
         self.bg_en = Channel(self.prefix + "bg.enabled", type = 'l', alias = name + " bg en")
         self.bg_capture = Channel(self.prefix + "bg.capture", type = 'l', alias = name + " bg capture")
         self.bg_capture_remain = Channel(self.prefix + "bg.capture_remain", alias = name + " capture remain")        
-
+        self.num_images = 1
         self.image = CamToolImage(self)
         set_device_alias(self.image, name + " image")
 
+        self.com_x = [1.0,2.0, 3.0]
+        class CamToolComX(Readable):
+            def read(self):        
+                return mean(self.com_x)
+        self.com_x_mean = CamToolComX()
+        set_device_alias(self.com_x_mean, name + " com x mean")
+
     def doInitialize(self):        
         if self.latch:
             self.start()
@@ -77,7 +83,11 @@ class CamTool(DeviceBase):
             time.sleep(0.001)                        
 
     def doUpdate(self):
-        self.capture()
+        for i in range(self.num_images):
+            self.capture()
+
+    def setNumberOfImages(self, value):
+        self.num_images = value
 
     def enableBackground(self, value):
         self.bg_en.write(1 if value else 0)