diff --git a/lib/intval/index.js b/lib/intval/index.js
index 06219b1..fa27623 100644
--- a/lib/intval/index.js
+++ b/lib/intval/index.js
@@ -162,7 +162,7 @@ intval._stop = function () {
 *
 */
 intval._watchMicro = function (err, val) {
-	const NOW = +new Date()
+	const now = +new Date()
 	if (err) {
 		log.error('_watchMicro', err)
 	}
@@ -171,13 +171,13 @@ intval._watchMicro = function (err, val) {
 	if (val === 0 && intval._state.frame.active) {
 		if (!intval._state.micro.primed) {
 			intval._state.micro.primed = true
-			intval._state.micro.exposure = NOW
+			intval._state.micro.time = now
 			//log.info('Microswitch primed to stop motor')
 		}
 	} else if (val === 1 && intval._state.frame.active) {
-		if (intval._state.micro.primed && !intval._state.micro.paused) {
+		if (intval._state.micro.primed && !intval._state.micro.paused && (now - intval._state.frame.start) > intval._frame.open) {
 			intval._state.micro.primed = false
-			intval._state.micro.exposure = 0
+			intval._state.micro.time = 0
 			//setTimeout( () => {
 				intval._stop()
 			//}, intval._microDelay)