fix gear

servo_pusher/servo_pusher2.scad

@@ -219,8 +219,8 @@ module servo_gear() {
     translate([ 0,    0, 0]) rotate([0,0, $t*360/n1])
     difference() {
     gear(mm_per_tooth,n2,thickness,hole_screw,twist,108);    // servo gear
-    cylinder(r=4.5/2, h=kopf_screw*2, center=true, $fn=100);
-    //gear(0.77,n_servo,thickness_servo*2,0,0,108);    // servo gear
+    translate([0,0,-thickness/2])    cylinder(r=4.5/2, h=kopf_screw*2, center=true, $fn=100);
+    translate([0,0,thickness/2])    gear(0.77,n_servo,thickness_servo*2,0,0,108);    // servo gear
     };
     echo("pitch radius of servo bearing is: ", pitch_radius(0.79, n_servo));
 }