User manual BROTHER 2340CV BROCHURE

[. . . ] 11 Two needle three threads cover stitch . When using the sewing machine, basic safety precautions should always be followed, including the following. The sewing machine should never be left unattended when plugged in. Always unplug this sewing machine from the electrical outlet immediately after using and before cleaning. [. . . ] CAUTION Always be sure to turn off the power before carrying out this operation. This machine is equipped with two sets of feed dogs under the presser foot to move the fabric through the machine. The differential feed controls the movement of both the front and the rear feed dogs. When set at 1, the feed dogs are moving at the same speed (ratio of 1). When the differential feed ratio is set at less than 1, the front feed dogs move slower than the rear feed dogs, stretching the fabric as it is sewn. This is effective on lightweight fabric that may pucker. When the differential feed ratio is set at greater than 1, the front feed dogs move faster than the back feed dogs, gathering the fabric as it is sewn. This function assists in removing the rippling when serging stretch fabrics. (1) Locate the differential feed adjustment lever on the left side of the machine. 0 Main feed (rear) Differential feed (front) Effect Material is pulled tight. Application Prevents thin materials from puckering Normal sewing Prevents stretch materials from stretching or puckering When stretch material is sewn without using the differential feed, the material will be wavy. To make the material more smooth, adjust the feed ratio from 1. (The feed ratio required depends on the elasticity of the material. ) The more elastic the material, the further toward 2. 0 the differential feed ratio should be set. Test sew with a scrap of the fabric to find the correct adjustment. CAUTION When sewing thick non-stretchable material such as denim, do not use the differential feed as it may damage the fabric. The pressure of the presser foot can be adjusted by Turning the pressure adjustment screw at the top left of this machine. Since this machine has already been adjusted to a pressure suitable for light to medium fabrics, no further adjustment is necessary except when sewing on very heavy or very light materials. Usually, when sewing on very light materials, the presser foot pressure should be loosened. When sewing very heavy materials, the presser foot pressure should be tightened. 1 Pressure adjustment screw 2 Less pressure 3 More pressure 4 Pressure adjustment screw 5 (Standard height for medium material) This machine uses a standard home sewing machine needle. [. . . ] (1) (2) Lower the presser foot, turn the handwheel toward you a few times by hand, and then lightly step on the foot controller to start sewing. (2) NOTE: When starting to sew or after changing the thread, in order for the needle thread to be on top of the presser foot, sew with it positioned under the presser foot when you begin sewing. If necessary, turn the handwheel toward you a few times by hand, and then cut the thread as shown in the illustration. (1) By hand, turn the handwheel toward you until the needle is at its highest position. [. . . ]