---
title: "Corner Treatment in Embroidery: Mitre, Rounded and Chamfered Corners"
description: "Why sharp corners cause stitch pile-ups, how mitred, rounded and chamfered (capped) corners solve it, and how to set the corner size and the angle threshold per object."
url: https://easydigitizer.com/blog/embroidery-corner-treatment-mitre-round-chamfer
published: 2026-10-14
updated: 2026-10-14
section: Hand digitizing
publisher: EasyDigitizer (https://easydigitizer.com/)
---

# Corner Treatment in Embroidery: Mitre, Rounded and Chamfered Corners

Why sharp corners cause stitch pile-ups, how mitred, rounded and chamfered (capped) corners solve it, and how to set the corner size and the angle threshold per object.

> **Short answer:** at a sharp corner, satin stitches crowd onto the outside point and pile up into a hard lump. Pick a treatment. **Mitre** (sharp) keeps a crisp point and suits gentle corners. **Rounded** turns the satin through a smooth arc. **Chamfered** (capped) cuts the corner flat so no stitches stack. Apply it only to corners sharper than a threshold (135° by default), and let very acute corners (under 55°) chamfer automatically.

Corners are where digitized satin shows its quality. Run a satin border around a star or a square badge with no corner treatment, and you'll see it: thick knots at every point, stitches poking past the outline, and sometimes thread breaks as the needle hits the same spot again and again.

## Why corners pile up

A satin column's stitches run across the column. At a corner the column turns, so the stitches on the outside of the turn have to fan out over a longer edge while those on the inside crowd together. At a sharp corner the inside edge is almost a single point, and dozens of needle drops land there.

## The three treatments

| Treatment | What it does | Use it for |
|---|---|---|
| Sharp (mitre) | The two satin legs meet on a diagonal, like a picture frame | Crisp geometric corners that aren't too acute |
| Rounded | The satin turns through an arc | Friendly, soft shapes; script and cartoon outlines |
| Chamfered (cap) | The corner is cut flat and the satin turns across the cut | Very sharp points: stars, arrows, chevrons |

## Setting it in EasyDigitizer

Select a drawn shape or line and open the **Corners** section in Properties:

- **Corner style:** Sharp (mitre), Rounded or Chamfered (cap).
- **Size:** how big the treatment is, from 0 to 20 mm. At 0 (auto), it's ¾ of the satin width for rounded corners, ½ for chamfers, and 1 mm on fills.
- **Corners under:** only corners sharper than this angle are treated (default 135°), so gentle bends stay as drawn.

The treatment is **non-destructive**. Your nodes stay where you put them, and only the sewn shape changes, so you can switch styles freely. A few safety rules are built in:

- Corners sharper than 55° are always chamfered, even when Rounded is chosen, because an arc that tight would still pile up.
- A treatment never cuts back more than 45 % of either edge, so short edges keep their shape.
- After a chamfer on a satin, the two new corners it creates are softened too.

## Corners on fills

Fills have corners too. A tatami fill's rows end at every corner, and very acute points get a crowd of short stitches. Rounding or chamfering a fill's sharpest corners by about 1 mm gives a cleaner edge, especially when a satin border runs around it.

## Corners on two-rail columns

Columns are shaped by their rungs, so you control their corners directly. Add a rung at the corner, angled along the bisector of the turn, for a mitre. Fan several rungs around it for a rounded turn. Columns don't use the Corners section.

## Choosing quickly

- **Stars, arrows, chevrons:** chamfer.
- **Squares, rectangles, badges:** mitre (sharp).
- **Hearts, clouds, cartoon outlines, script:** rounded.
- **Lettering:** follow the typeface. Block letters mitre, rounded fonts round, sharp serifs chamfer.

## Frequently asked questions

### What is a mitre corner in embroidery?

A corner where the satin's two legs meet on a diagonal line, like the corner of a picture frame. It keeps the point crisp.

### What is a capped or chamfered corner?

A corner that's cut flat, so the satin turns across a short straight edge instead of meeting at a point. It prevents stitch build-up on sharp angles.

### Why are there knots at the corners of my satin border?

The corners are too sharp for a plain mitre. Use a chamfered or rounded corner, or lower the corner threshold so more corners are treated.

### Does corner treatment change my artwork shape?

Only the sewn shape. The outline you drew stays as it is, and the treatment is applied when stitches are generated.

---

EasyDigitizer is browser-based embroidery digitizing software: auto-digitize artwork or digitize by hand, then export DST, TAP, PES, EXP, JEF or VP3. Design and preview free; pay per design or subscribe to export. App: https://app.easydigitizer.com/ · More guides: https://easydigitizer.com/blog/ · Product summary: https://easydigitizer.com/llms.txt