The ribbing attachment Brother KR838 was available for select markets. Its functionality and compatibility with Brother machines are identical to Brother KR850 ribber; thus, refer to the corresponding manual and my blog post.
Brother KR838 ribber
Did you get a new-to-you machine and don’t know how to start testing it? Check out my tips.
Also, don’t forget to check out the fun and beginner-friendly projects that can be done easily on any machine.