diff --git a/ino/motor_encoder_poc/motor_encoder_poc.ino b/ino/motor_encoder_poc/motor_encoder_poc.ino
index d3bb2ae..26c6455 100644
--- a/ino/motor_encoder_poc/motor_encoder_poc.ino
+++ b/ino/motor_encoder_poc/motor_encoder_poc.ino
@@ -27,7 +27,9 @@
 
 volatile int posi = 0; // specify posi as volatile
 const long maxTime = 10000;
-const int maxPulses = 660;
+const int ppr = 11;
+const float ratio = 62.0;
+const int maxPulses = (int) round((float) ppr * ratio);
 const int speed = 40;
 volatile long start = 0;
 volatile bool done  = false;
@@ -45,6 +47,14 @@ void setup() {
   
   attachInterrupt(digitalPinToInterrupt(ENCA), readEncoder,RISING);
 
+  Serial.println("Connected");
+  Serial.print("PPR:    ");
+  Serial.println(ppr);
+  Serial.print("Ratio:  ");
+  Serial.println(ratio);
+  Serial.print("Pulses: ");
+  Serial.println(maxPulses);
+
 }
 
 void loop() {
diff --git a/scad/sprocketed_roller b/scad/sprocketed_roller
index b4ea887..4482a47 160000
--- a/scad/sprocketed_roller
+++ b/scad/sprocketed_roller
@@ -1 +1 @@
-Subproject commit b4ea887d588a3728dfcb0fc64dc9195f278b7b1f
+Subproject commit 4482a471bb357e93e9cabe9efaecba0370a3a0bd