i am trying to make an RFID safe. the mechanism will use a garden gate latch such as this one:http://www.laornamental.com/Store/product3eb3.html?prdId=523532
The locking part of the latch is mounted on a piece of wood next to a continuous rotation servo. the servo turns and pulls a string connected to the latch which opens it, allowing the door to open. The latch opens and everything, but the problem i am having is that the servo moves past its stopping point on the previous rotation. For example, if on rotation 1, the servo stops at the 1 o'clock position, on rotation 2, it stops just before to 2 o'clock position, and on rotation 3, it stops just past the 2 o'clock position, and so on and so forth. Eventually, the servo turns but no longer opens the latch. I dont think its a software problem because the program simply tells the servo to turn for 1.5 seconds, pause for 3 seconds, and move backwards for 1.5 seconds and stop. Please help.
thanks in advance.