Sparks In Sewing Machine Motor
I hope this is just a dumb question and not something serious...
Bit of background - a couple of years ago I came across a Portable Electric White Family Rotary circa 1921 (or earlier...its the exact same machine as the treadle version, but with a motor on the side. Husqvarna-Viking gave me the build date of the wrong machine when I asked them.) in very good shape. It had been used until maybe a year or so before I bought it, and then given to the secondhand store when the old lady either died or became incapacitated. It even still had thread in the bobbin. I downloaded both manual #11 and #12 for it.
So today I was going to try and learn to use it for a silly little project, and in testing it pressed the footbar. The motor was slow in getting going, but it did...but...smoke came out of it. Assuming that this was smoke from any accumulated dust, I tried it a few more times and indeed the smoke did stop and the motor runs smoothly. But...here's my possibly dumb question. When looking at the motor while its running, from the angle that the picture below is taken, I see sparks inside the motor. Should I be seeing sparks?
This is my machine (I'm working on cleaning and oiling the bobbin case and shuttle/race, that's why the plate is missing):