I would say try a new needle too. I have an 830 on a Grace Mini Pinn frame & use it with no problem. I also have a spring loaded foot on it, generic one, not the expensive on Viking makes!, & use the spring load setting on my machine for it, & it works great. So, not sure what your machine problem, but keep trying, hopefully a new needle will solve the problem!...Good luck, I love my machine! Welcome here too!