Hi Tweakie
I have an off the wall question for you. Here goes, I am in the process of automating the upper takeup roller of my CNC Quilter, and I am running into a programming issue. I have constructed a moving plate to carry the upper roller and roll it up as it travels forward, and unroll it when it reverses. That all works fine. The question is regarding synchronizing the movement of the upper roller with the movement of the Y-axis along the same longitudinal axis. This motion only needs to move about two inches when the center of the throat of the sewing machine is not in place over the takeup roller, but when the throat moves either forward or reverse over the roller, the direction of the movement of the takeup roller must be the same as the carriage with the Y-axis. I hope that makes sense. I have placed a drawing of the roller and the sewing machine carriage as an attachment. You will see that the roller is centered in the throat of the sewing machine. As the sewing machine moves forward, the takeup roller needs to move to stay centered in the throat, same with the reverse movement.
Any thoughts?
Larry