# Concepts

## <mark style="color:red;">Printed part codes</mark>

Our parts have printed codes to aid assembly.

1. A part code identifies
   1. If the part belongs on the **left (‘L’)** or **right (‘R’)** side of the printer.
   2. The **version** of the part.

<figure><img src="https://834763357-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXgzDoYdwl0Vuu3qB4KOp%2Fuploads%2FjycCRH6nSra3Xk9eKGoS%2Fmerc_naming_concept_example.png?alt=media&#x26;token=56a04860-1760-4959-abc3-cc8e662cde3a" alt=""><figcaption></figcaption></figure>

## <mark style="color:red;">Flange Stacks</mark>

Flange stacks (along with 5x30mm dowel pins) are used to create smooth idlers.

{% hint style="info" %}
Quality idlers, smooth and toothed, are key for your printer's performance. We use flange stacks throughout assembly.
{% endhint %}

Single flange stacks use

* [**three (3)** shims](#user-content-fn-1)[^1] and [**two (2)** bearings](#user-content-fn-2)[^2].

Double stacks uses

* [**five (5**) shims](#user-content-fn-1)[^1] and [**four (4)** bearings](#user-content-fn-2)[^2].

<figure><img src="https://834763357-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXgzDoYdwl0Vuu3qB4KOp%2Fuploads%2FFRkuDgFyw2p2Cki2ZuDH%2Fflange_stack_example_concept.png?alt=media&#x26;token=2067fa24-00d1-476b-9f19-036e56e7cc24" alt=""><figcaption></figcaption></figure>

## <mark style="color:red;">Types of Idlers</mark>

### <mark style="color:red;">Smooth Idlers</mark>

[Smooth idlers](#user-content-fn-3)[^3] are the most common idler that we will use; they turn the belt around its smooth side.

A **single flange stack** has **one (1)** smooth idler; a **double flange stack** has **two (2)**.

<figure><img src="https://834763357-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXgzDoYdwl0Vuu3qB4KOp%2Fuploads%2FgCFXu2QSj9GiJdgt7m0a%2Fimage.png?alt=media&#x26;token=e238a3f7-b56b-4cf0-9828-657c2b5a107c" alt=""><figcaption></figcaption></figure>

### <mark style="color:red;">Toothed Idlers</mark>

**Toothed idlers** are used on the **X joints only**. These are used when the belt turns towards its toothed side.

<figure><img src="https://834763357-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXgzDoYdwl0Vuu3qB4KOp%2Fuploads%2FvPAZZqHbvFCi0swaQFlL%2Fimage.png?alt=media&#x26;token=a04ba1b2-2082-482b-a9b3-8a3077ac0481" alt="" width="375"><figcaption></figcaption></figure>

[^1]: M5X1MM

[^2]: F695 BEARING

[^3]: Revering to one step up, this is our definition of Smooth Idlers.