I have to create a test harness for a lab. Part of the procedure is the pulling of a wire in tension. That is, the wire, when pulled, exerts resistance and thus will revert back to its original position when there is insufficient force pulling on it. I have to find a way to keep the wire in place when I pull it without the use of my hands so as to conduct experiments on the tension of the wire. There are a couple of ways that I found I could tackle this. Firstly, there could be a track that could pull the wire and the track could have locks to keep the wire at certain positions when needed. Secondly, I could pull the wire by hand and keep it at a certain position somehow. For the track option, I'm lost as to what could do this. Could anyone please provide some reference that would solve this issue? The method must be really simple, so if the method is not complicated, I would create it. For the manual pulling and stopping option, I was considering laying a rubber base on the platform and then pulling the wire on top of it. Then, I would have velcro going over the wire tightly to hold it in place (the rubber would provide friction, preventing it from going back to its original position). Although the method is simple, a possible issue is that the tension will overcome the velcro and rubber base. Does anyone have any other idea as to how to keep the wire at a certain position when pulled? Thanks a lot for the inputs.