diff --git a/machines/wind_mill.lua b/machines/wind_mill.lua
index 5bfccc5..9c01464 100644
--- a/machines/wind_mill.lua
+++ b/machines/wind_mill.lua
@@ -76,13 +76,14 @@ function industrialtest.WindMill.action(self,pos)
 		local dimMax=31000
 		local dim=mcl_worlds.pos_to_dimension(pos)
 		if dim=="overworld" then
-			dimMax=mcl_vars.mg_overworld_max
+			dimMax=mcl_vars.mg_overworld_max_official
 		elseif dim=="nether" then
 			dimMax=mcl_vars.mg_nether_max
 		elseif dim=="end" then
-			dimMax=mcl_vars.mg_end_max
+			dimMax=mcl_vars.mg_end_max_official
 		end
-		charging=math.max(mcl_worlds.layer_to_y(pos.y,dim),0)/dimMax
+		local layer,_=mcl_worlds.y_to_layer(pos.y)
+		charging=math.min(math.max((layer or 0),0)/dimMax,1.0)
 	end
 	local neighbourPositions={
 		vector.offset(pos,-1,0,0),