There are many factors that go into beautiful embroidery.

Using the appropriate stabilizer and hooping the fabric in the frame are two important factors mentioned earlier.  For details, refer to "How do I hoop the fabric in the embroidery frame?".

Another important point is the appropriateness of the needle and thread being used. See the explanation of threads below.

Thread

Stabilizer material

• Attach a stabilizer material for embroidery to the fabric to prevent poor quality embroidery designs.
   
• Prepare stabilizer material that is larger than the embroidery frame being used.
   
• When embroidering on thin fabrics such as organdy or lawn, or on napped fabrics such as terry cloth or corduroy, use water soluble stabilizer (sold separately) for best results. The water soluble stabilizer material will dissolve completely in water, giving the project a more attractive finish.
   
• In the case of thick terry cloth towels we recommend that you place a piece of water soluble stabilizer on the top surface of the towel. This will help to reduce the nap of the toweling and result in more attractive embroidery.
   
• When using fabrics that cannot be ironed (such as terry cloth or fabrics that have loops which expand when ironed) or in places where ironing is difficult, position the stabilizer material under the fabric without fusing it, then position the fabric and stabilizer in the embroidery frame, or check with your authorized Brother dealer for the correct stabilizer to use.

Others

• When embroidering on large pieces of fabric, arrange the fabric so that it does not hang off the table where the sewing machine is placed. If embroidery is done with the fabric hanging off, the embroidery unit movement may be impaired, this could cause the pattern to sew incorrectly.
   
• Do not leave objects in the range of motion of the embroidery frame. The frame may strike the object and cause a poor finish to the embroidery pattern.
   
• Do not let hands or objects hit the carriage while sewing. The pattern may misalign.