to some extent, the thread you use depends on the project you are making. I use a 40 weight rayon on for those projects that probably will not be laundered very much. Rayon thread is not as strong as poly or cotton threads but has a beautiful texture to it. I have mainly RA (Robinson Anton) Rayon thread as that is what my Viking dealer carried when I first got my viking machine. I use poly if the item probably will be laundered or if I am doing a free standing lace design like a book mark. Poly is stronger and has more body. Again I have RA poly 40 weight. A lot of folks I know use Isocord poly 40 weight and that is a nice thread also. I also have used YLI soft touch 50 weight cotton thread for finer free standing lace like snowflakes. I have some Mettler metrosone thread that is also very nice and gives a softer more matte finish to embroideries. I tried some sulky threads but had more problems with breakage with them. I would pick a project and start out with some poly threads and see how you like them. Also look at what is available locally but don't make that your primary decision as I do not care for the thread available at some of my local shops. It is very nice to have a large number of colors at hand so you do not have to run to get the specific colors for each project. I would advise you that once you have decided on the brand and type of thread you like, that you purchase a thread card (has actual samples of each color thread) this is so helpful. I think the Ruby will have a thread conversion chart built in so you can use the brand of threads you have if the design calls for another brand of thread. I would check and see what thread manufactures the embroidery conversion program has built in. I have way more thread then I will ever hope to use so I have not explored the more recent threads that have come out but there are a lot of them. I would also check out what embroidery threads superior has as some of their threads can be used for machine embroidery as well as piecing and quilting so you could cut down on the number of threads you have.
Oh, the Ruby has been out for a while now...?maybe 10 years. If you have a local Viking dealer you could ask or go to the Viking website and look up under the "support" link. you may have to scroll down the list of machines and pick "other machines" if it is not listed. They will usually have an firmware updates there and you can see what the last one was. They usually don't update the machines after a few years so it will give you an idea.
Ok...back from the viking website....that latest update for Viking Ruby Deluxe is in 2016 and it is found in the bottom tap under "other machines" make sure you click on that one if you need a manual. The Viking Ruby 90 is not the machine you want to click on...why do so many manufactures give the same basic name to so many versions?
Last edited by sewingpup; 10-30-2021 at 09:45 AM.