Feed Dog
A feed dog is a tooth-like part that moves in and out from beneath the sewing machine needle plate, and it works together with the presser foot to feed the fabric backward in set increments.
Contents6 sections
Definition and Role
A feed dog is a part with small teeth visible through the hole in the needle plate. It works in sync with the motion of the sewing needle as it passes through the fabric, lifting the fabric and feeding it backward, then returning it beneath the needle plate again. This repeated action allows sewing at a set stitch length.
Fabric feeding is not accomplished by the feed dog alone. The presser foot, which holds the fabric from above, works together with it to feed the fabric, so presser pressure, the needle plate, and the thickness and slipperiness of the material being sewn also affect stitch stability.
How to Use and Adjust Fabric Feeding
For normal sewing, use the machine with the feed dog raised and let the machine feed the fabric without pulling it by hand. Pulling strongly by hand can make stitches too tight or too loose, and may lead to bent or broken needles.
Stitch length is generally adjusted by changing the feed amount of the feed dog. For thin fabrics, stretch materials, and thick fabrics, it is important to do a test sew and check the stitch length, thread tension, and presser pressure together.
For free-motion quilting or darning, a setting that lowers the feed dog or stops the feed may be used. In this case, the fabric is moved by hand while sewing, so the way the fabric is handled differs from normal sewing.
- Do not pull the fabric strongly from the front or back
- At the start of sewing, hold the fabric edge and check where the needle will land
- For slippery or stretchy fabrics, test the feeding on scrap pieces
- After lowering the feed dog, return it to the original position before normal sewing
Types and How to Choose
Feed dogs differ in shape, number of teeth, and feed method depending on the sewing machine model. Many household sewing machines have multiple feed dogs, and industrial or professional machines may be selected together with the needle plate and presser foot according to the intended use and sewing specifications.
With thick fabrics, uneven sections, slippery materials, and knits, the standard bottom feed alone may cause differences in feed amount between the top and bottom layers. In such cases, consider using an auxiliary tool such as a walking foot that also feeds the fabric from above, or a presser foot suitable for the material.
When choosing a feed dog as a replacement part, compatibility is not guaranteed even if it looks similar. Check the sewing machine model, the combination with the needle plate, and the height of the feed dog, and use a part that fits the machine model.
Care and Safety Notes
Lint and fiber debris tend to collect in the grooves of the feed dog, and buildup can make fabric feeding unstable. Turn off the power and raise the needle, then if the model allows the needle plate to be removed, clean it with the included brush or similar tool.
Whether oil needs to be applied around the feed dog or needle plate, and where it should be applied, varies by sewing machine. Applying too much oil on your own may stain the fabric or thread, so follow the instruction manual.
Always turn off the power before cleaning, removing the needle plate, or replacing the feed dog. If a needle breaks, unusual noise occurs, or fabric feeding becomes poor during sewing, stop using the machine and check for damage to the needle, presser foot, needle plate, or feed dog, as well as their installation condition.
Differences from Similar Terms
The feed dog is the part that moves the fabric from below, while the presser foot is the part that holds the fabric from above. The needle plate has holes for the needle and feed dog to pass through and supports the fabric. These parts are related to one another, but each has a different role.
A walking foot is not the feed dog itself, but a type of presser foot that also feeds the upper fabric. It is used when you want to reduce shifting between the top and bottom layers. On the other hand, lowering the feed dog and moving the fabric by hand is used for free-motion sewing.
Frequently Asked Questions
Why does the feed dog not feed the fabric?
Main things to check are whether the feed dog has been left lowered, whether lint is clogging the area around the feed dog, and whether the presser foot is lowered. It can also happen if the needle plate or feed dog is damaged, or if a part is out of position, so if the problem is not fixed after cleaning, check the instruction manual and request inspection if necessary.
What should I do if thin fabrics or knits do not advance easily?
First choose a sewing machine needle, thread, and presser foot suitable for the material, and adjust the presser pressure and stitch length on a scrap piece. For thin fabrics, be careful about the needle catching in the hole of the needle plate, and for knits, also watch for stretching and waviness. If the top and bottom layers shift, an upper-feed function or an auxiliary presser foot may also be options.
