diff --git a/machines/simple_electric_item_processor.lua b/machines/simple_electric_item_processor.lua
index 18ceb6e..458e075 100644
--- a/machines/simple_electric_item_processor.lua
+++ b/machines/simple_electric_item_processor.lua
@@ -98,12 +98,10 @@ function industrialtest.SimpleElectricItemProcessor.onMetadataInventoryMove(self
 	local inv=meta:get_inventory()
 	local srcSlot=inv:get_stack("src",1)
 	local dstSlot=inv:get_stack("dst",1)
-	if fromList=="src" and count==srcSlot:get_count() then
+	if fromList=="src" and srcSlot:is_empty() then
 		meta:set_float("srcTime",-1)
 		meta:set_float("maxSrcTime",0)
-		if meta:get_int("industrialtest.powerAmount")>0 then
-			self:updateFormspec(pos)
-		end
+		self:updateFormspec(pos)
 	elseif fromList=="dst" and dstSlot:get_free_space()>0 then
 		self:triggerIfNeeded(pos)
 	end
@@ -120,12 +118,10 @@ function industrialtest.SimpleElectricItemProcessor.onMetadataInventoryTake(self
 	local inv=meta:get_inventory()
 	local srcSlot=inv:get_stack("src",1)
 	local dstSlot=inv:get_stack("dst",1)
-	if listname=="src" and stack:get_count()==srcSlot:get_count() then
+	if listname=="src" and srcSlot:is_empty() then
 		meta:set_float("srcTime",-1)
 		meta:set_float("maxSrcTime",0)
-		if meta:get_int("industrialtest.powerAmount")>0 then
-			self:updateFormspec(pos)
-		end
+		self:updateFormspec(pos)
 	elseif listname=="dst" and dstSlot:get_free_space()>0 then
 		self:triggerIfNeeded(pos)
 	end