Looks like an older mechanical machine--looks very similar to a Bernina I have. Hopefully nothing is broken or out of alignment that would cause this. Refrain from forcing the motor to run while the machine's parts will not move freely or it could damage the motor.
These are great machines, however, they do need maintenance to keep them operating smoothly. They are very prone to seizing when the old oil dries and turns to varnish, thus preventing the parts from moving efficiently. Here's the method I've use to fix several older machines that suffered from this problem. The problem can affect any moving part of your machine, ie the needle bar, the selector knobs/dials/levers, the feed dogs, the handwheel, etc.
Wheel on right side that controls the needle up and down is very tight...
Answers & Comments
Looks like an older mechanical machine--looks very similar to a Bernina I have. Hopefully nothing is broken or out of alignment that would cause this. Refrain from forcing the motor to run while the machine's parts will not move freely or it could damage the motor.
These are great machines, however, they do need maintenance to keep them operating smoothly. They are very prone to seizing when the old oil dries and turns to varnish, thus preventing the parts from moving efficiently. Here's the method I've use to fix several older machines that suffered from this problem. The problem can affect any moving part of your machine, ie the needle bar, the selector knobs/dials/levers, the feed dogs, the handwheel, etc.
Wheel on right side that controls the needle up and down is very tight...