Hello sewing machine nuts
I'm having a lot of fun getting the machines, 7 now, going. 3 of those machines have the same prob of showing dramatically different thread tensions in foward vs. reverse. I get the foward stitching looking pretty good by testing and adjusting the upper and lower tensions then in reverse it all goes south, the top thread runs straight on top of the fabric with lower thread loops on top, the same prob on all 3 machines, no problems with the other 4 machines of similar pedigree. The prob machines are a 1960? very heavy Riccar straight and zz, it has push button reverse and a reverse hold feature; An '80s? Nelco model SZA-221 with push button reverse only, it has stitch length probs also; And a later model Phaff Hobby beginner model that would need an expert to run because the upper tension assembly is hidden, it has push lever reverse only. I've done a lot of reading and experimenting before bugging the folks on this forum. Any ideas? Thanks from San Diego.