Lesson 1
Can two walk together, except they be agreed?
Amos 3:3
How the Walking Foot Keeps Three Layers Honest
Why an ordinary presser foot fails on a quilt
An ordinary presser foot does one job: it presses down and holds the cloth against the feed dogs, which pull from below. With a single layer that is a fair arrangement. With a quilt sandwich — top, batting, backing — it is not. The feed dogs grip only the backing and march it forward. The top layer, pinned under the smooth sole of the foot, is held back by friction. Every stitch moves the bottom a hair farther than the top. You do not see it for the first foot of stitching. By the far edge of a bed quilt you have a fold pleated in, a border that no longer lies flat, or a block pulled visibly out of square.
A walking foot, sold also as an even-feed foot, answers the problem directly. It carries its own set of feed dogs on the underside of the sole, driven by an arm that rides the needle bar. Both sets of dogs release as the needle comes down into the cloth, and both move forward together as the needle rises. The top layer is carried the same distance as the bottom. Nothing is left behind.
Scripture asks whether two can walk together unless they be agreed. That is the whole mechanical idea in one line. The upper feed and the lower feed must be in agreement, timed to the same needle, or they fight, and the fabric is what suffers. It is worth remembering when the work is other than sewing.
Mounting it and checking clearance
Walking feet attach differently from a snap-on foot. Most have a fork or arm that must sit over the needle clamp screw, and a shank that bolts where your ordinary shank sits. If the fork is not seated on the clamp screw, the upper dogs never move and you have a heavy, clumsy plain foot.
Before you touch the pedal, turn the handwheel toward you through one complete stitch and watch. The needle should enter the center of the opening cleanly. The fork should ride up and down without knocking the clamp or the needle. This ten-second check has saved a great many needles and more than a few bent needle bars.
Easing the pressure
New quilters assume more pressure means better control. The reverse is true over batting. Too much presser foot pressure compresses the loft directly under the foot and shoves the layers ahead of the needle instead of guiding them. The result is a small ripple that runs before the foot and gets stitched down as a pucker.
If your machine has an adjustable presser foot pressure — a dial, a screw on top of the presser bar, or a setting in the menu — ease it off gradually rather than dropping it to the bottom of its range. Machines differ so widely in how their pressure scales are numbered that no single number is worth quoting. Stitch a few inches on a practice sandwich, look at the surface behind the foot, and reduce a little further only while the layers still feed without shifting. When they begin to creep, you have gone one step too far; come back up.
Speed, rhythm, and thick spots
The upper feed mechanism is a linkage, and a linkage needs a moment to complete its travel. Run at roughly half to three-quarters of your machine's top speed. Domestic machines generally run somewhere around 800 to 1200 stitches a minute wide open, which is faster than the walking foot wants to work. Pushed to full speed, the dogs can skip on a thick spot — a seam intersection where six or eight layers stack — and you get a run of short, crowded stitches or a slipped inch.
At a seam intersection, keep your speed steady and simply feed with your hands resting flat on the quilt, guiding, never pulling. Pulling the quilt through defeats the foot entirely.
Reading the result
Turn the sample over. Even feed shows as a clean, straight line of stitching front and back, with the two outer layers ending flush at the far edge. If the backing extends past the top by half an inch after twenty inches of stitching, your feed is not even: check the fork seating first, then the pressure, then your speed. If the fabric shows small crosswise ripples between quilting lines, that is nearly always pressure, not tension.
Check yourself
What does a walking foot add that an ordinary presser foot lacks?
- A second needle position
- Its own set of feed dogs on the underside of the sole
- A built-in seam guide only
- A larger needle eye
Answer
B. Its own set of feed dogs on the underside of the sole
Why does an ordinary presser foot cause the top layer to lag on a quilt sandwich?
- The feed dogs grip only the backing while friction holds the top back
- The batting stretches lengthwise
- The needle pushes the top layer backward
- The bobbin thread pulls the top toward the operator
Answer
A. The feed dogs grip only the backing while friction holds the top back
The upper feed dogs of a walking foot are driven by:
- A separate motor inside the foot
- The bobbin race
- An arm that rides the needle bar
- Air pressure from the machine's fan
Answer
C. An arm that rides the needle bar
When does a walking foot's feeding action occur?
- Continuously, whether the needle is up or down
- Only when reverse is engaged
- Only on thick seam intersections
- Both sets of dogs release as the needle enters and move forward as it rises
Answer
D. Both sets of dogs release as the needle enters and move forward as it rises
What is the likely fault if the fork of the walking foot is not seated over the needle clamp screw?
- The bobbin will not wind
- The upper feed dogs never move and the foot behaves like a plain foot
- The stitch length doubles
- The tension disc opens
Answer
B. The upper feed dogs never move and the foot behaves like a plain foot
What check should be made before pressing the pedal after mounting a walking foot?
- Turn the handwheel through one full stitch and watch for clearance
- Rethread the bobbin
- Wash the batting
- Set stitch length to zero
Answer
A. Turn the handwheel through one full stitch and watch for clearance
Too much presser foot pressure over batting typically causes:
- Bobbin thread breakage
- A ripple pushed ahead of the foot that gets stitched in as a pucker
- The needle to unthread itself
- The upper dogs to run backward
Answer
B. A ripple pushed ahead of the foot that gets stitched in as a pucker
Why does the material avoid giving a specific number for presser foot pressure?
- Pressure has no effect on quilting
- The number is always 5.0
- Machines differ widely in how their pressure ranges are numbered
- Pressure is set by the thread weight
Answer
C. Machines differ widely in how their pressure ranges are numbered
What machine speed suits walking foot quilting?
- Full speed at all times
- The slowest possible stitch-by-stitch pace only
- Roughly half to three-quarters of the machine's top speed
- Whatever speed makes the foot hop
Answer
C. Roughly half to three-quarters of the machine's top speed
Amos 3:3 asks whether two can walk together except they be agreed. How does it match the foot?
- It teaches that quilting must be done in pairs
- It forbids the use of machines
- It refers to the two thread colors in a quilt
- The upper and lower feed must be timed in agreement or the fabric suffers
Answer
D. The upper and lower feed must be timed in agreement or the fabric suffers