diff --git a/springy.js b/springy.js
index 2304747..e2fc76b 100644
--- a/springy.js
+++ b/springy.js
@@ -325,11 +325,12 @@
 
 	// -----------
 	var Layout = Springy.Layout = {};
-	Layout.ForceDirected = function(graph, stiffness, repulsion, damping) {
+	Layout.ForceDirected = function(graph, stiffness, repulsion, damping, minEnergyThreshold) {
 		this.graph = graph;
 		this.stiffness = stiffness; // spring stiffness constant
 		this.repulsion = repulsion; // repulsion constant
 		this.damping = damping; // velocity damping factor
+		this.minEnergyThreshold = minEnergyThreshold || 0.01; //threshold used to determine render stop 
 
 		this.nodePoints = {}; // keep track of points associated with nodes
 		this.edgeSprings = {}; // keep track of springs associated with edges
@@ -508,7 +509,7 @@
 			}
 
 			// stop simulation when energy of the system goes below a threshold
-			if (t._stop || t.totalEnergy() < 0.01) {
+			if (t._stop || t.totalEnergy() < t.minEnergyThreshold) {
 				t._started = false;
 				if (onRenderStop !== undefined) { onRenderStop(); }
 			} else {