Fixes the robot transformer (#4430)

-fixes #4245

code/game/machinery/transformer.dm

@@ -34,7 +34,7 @@
 		var/turf/west = get_step(src, WEST)
 		if(istype(west, /turf/simulated/floor))
 			new /obj/machinery/conveyor(west, WEST, 1)
-	
+
 /obj/machinery/transformer/CollidedWith(var/atom/movable/AM)
 	// HasEntered didn't like people lying down.
 	if(ishuman(AM))
@@ -56,15 +56,17 @@
 		use_power(6000) // Use a lot of power.
 		visible_message("<span class='danger'>The machine makes a series of loud sounds as it starts to replace [H]'s organs and limbs with robotic parts!</span>")
 		H <<"<span class='danger'>You feel a horrible pain as the machine you entered starts to rip you apart and replace your limbs and organs!</span>"
-		sleep(30)
-		if(H.loc == src.loc)
-			H <<"<span class='danger'> You lose consciousness for a brief moment before waking up with a whole new body...</span>"
-			H.Robotize()
-			playsound(src.loc, 'sound/machines/ping.ogg', 50, 0)
-			canuse = 0
-			sleep(120) // cooldown
-			canuse = 1
+		H.Robotize()
+		H <<"<span class='danger'> You lose consciousness for a brief moment before waking up with a whole new body...</span>"
+		playsound(src.loc, 'sound/machines/ping.ogg', 50, 0)
+		canuse = FALSE
+		addtimer(CALLBACK(src, .proc/rearm), 120 SECONDS)
 	else
 		playsound(src.loc, 'sound/machines/buzz-sigh.ogg', 50, 0)
 		visible_message("<span class='notice'>The machine displays an error message reading it is still making the required parts.</span>")
 		return
+
+/obj/machinery/transformer/proc/rearm()
+	src.visible_message("<span class='notice'>\The [src] pings!</span>")
+	playsound(src.loc, 'sound/machines/ping.ogg', 50, 0)
+	canuse = TRUE