spongocoel Report post Posted March 1, 2016 Does anyone know if needle position synchronizers for servo motors are compatible from control box to control box? I have a machine with a J7R Control Box (Model KE120B) that does not currently have a NPS installed, but it looks like it has the square four-pronged jack for it. I also have a spare position sensor from a Reliable SM6000SM that looks like it will plug right in there. Before I go and find a hand wheel bolt and plug it in, I just wanted a quick sanity check - is there any possibility this could work? Is there any possibility I could short something out or hurt anything? Quote Share this post Link to post Share on other sites
dikman Report post Posted March 2, 2016 Is there any possibility I could short something out or hurt anything? Quite possibly. Mine also has a 4-pin connection (Skyrit servo from China) but I have no idea if there's a wiring "standard" for these things. Unfortunately no-one seems to provide wiring diagrams for these things. Quote Share this post Link to post Share on other sites
dikman Report post Posted March 2, 2016 Don't know if this will help. I opened mine up and traced the connections. Looking at the front of the plug, notch at top. I'm guessing D and U (labels on the PC board) refer to Down and UP. (Excuse the slightly blurry photo, camera didn't want to focus where I wanted it to!!). If the plug on yours matches the socket on the servo, I would suggest checking the connections. As long as the +ve and -ve line up then plugging it in shouldn't do any damage. Quote Share this post Link to post Share on other sites
Gregg From Keystone Sewing Report post Posted March 2, 2016 J7R brand motor with control box KE120B uses syncronizer model SY2D that we offer and have in stock if you are need. Quote Share this post Link to post Share on other sites
