My serger won't cut. The cutting blade will not move up and down. Where can I go on line to look at how the serger (white superlock) works so I can see if I can better understand the problem

SOURCE: White Superlock Serger 1934D

Either adjust your knife to cut wider or tighten both looper threads.
sewman7

SOURCE: I have a juki mo-3614

first, pull out the bvlades and make surte they are sharp. It could simply be that they are dull. Next, line tyhe bottom blade up level to the surface of the needle plate. The top blade should be adjusted to where it slices against the botom blade. You may have to experiment with the height adjustment on the top blade, assuming you have a suitable cutting edge.

SOURCE: serger blades do not cut.

For now, it works only satisfactorily:
I applied alcohol to further clean both blades,
dried and then oiled them. There seemed to be a slight gap between blades;
the fabric was dragged into the gap instead of being cut.

SOURCE: my viking serger 905 wont cut

Sometimes the blades need to be adjusted. Lower them all the way manually to the bottom. The cutters if you look on the side should meet. If they don't' meet or if there is a small space then the upper cutter needs to be lowered.
There are screws that hold this in place. You might need a man to help since the screws on my machine are very tight!

SOURCE: Brother 1034D serger is not cutting and is binding up

This problem is usually when the lower blade drops below the sewing plate. Look at the blade in relation to the plate and see if it has dropped below the plate, then you can reset the blade. If it is not the upper blade may be too dull to cut so it will need to be replaced.