On the Archaic Arcane blog is a rather good one, maybe in two separate posts. I can't make links at the moment, but should be possible to search up. One part of it is to clean and polish up the parts themselves; another is to adjust them for a good speed range from stop to start. I think there's only one adjustment nut to set the distance for movement or push on the parts that control speed. Speed should be gradual from stop to full.
Some have reported improvement when they have had the carbon disks out of the bakelite casing and cleaned them carefully. There's often a sort of putty or chalk seal on top, and it can look like it's permanent but in but it comes off. These disks brake easily, so handle them gently, have them flat on a smooth surface, and rub them dustyfree with a microfiber cloth. This might not be necessary, and it's a bit dusty, similar to the dust comming of a pencil tip when you sharpen it.
Yet another thing is developing a feel for the pedal, I use it the wrong way around from Singers original suggestion, I have my foot on top of it and use my big toe to push it down. If you have shoes with proper sole on, you rest your foot on the solid button, and press gently on the push button. Both ways work fine.
Last edited by Mickey2; 12-14-2017 at 05:10 PM.