I cannot raise the drop feed lever.

If you used the slide control to lower the drop feed lever and you want to raise it again, first return the slide control to the position as shown in the picture below. Then either press the foot controller for a short time, or turn the handwheel manually one or two turns. The drop feed lever should now move upwards and feed the fabric as usual.

In rare cases, the spaces in the drop feed lever may become dirty and need cleaning.