# Fiber

{% hint style="success" %}
Fiber print options are only available to **Premium** users.
{% endhint %}

{% hint style="success" %}
Note: Fiber 3D print settings will work only with **FabMachines F3** printer models. Make sure to select the **F3 printer** before using Fiber print settings
{% endhint %}

## Basic Settings

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Fiber print by default uses Extrude 2 in C6. Enabling Fiber print will override any conflicting Extruder 2 settings
{% endhint %}

Check the **Fiber Print** checkbox to enable fiber print. 

<figure><img src="/files/VEKDIhOWodSkCVJNIlSu" alt=""><figcaption><p>C6 - Fiber print basic settings</p></figcaption></figure>

#### Extrusion Width

Fixed-width of the fiber filament when printed. This should be provided by the fiber manufacturer. Note that the width of filament in the spool (generally circular section) will be less than the printed width.

For FabMachines' CF print filament, the width is 2mm.

Entering incorrect width here can lead to overlapping fibers and other issues as described in [Fiber 3D Printing nuances](/fiber-3d-printing.md)

#### Print Speed (`FIBER_PRINT_SPEED)`

Speed at which fiber will be printed on the part.

Fiber print speed should match the speed at which the fiber is extruded from the spool (unlike plastic print). A mismatch can lead to fiber pulling away from the layer or excess fiber extrusion, which will lead to fiber not sticking on the layer and causing folds.

Print speed for fiber is generally slower than plastic because plastic filament melts completely and sticks to the layer. Fiber on the other hand is a continuous entity, which doesn't melt and deposit. It deposits with the help of surrounding resin material.&#x20;

#### **Print Speed after Cut**

Speed at which fiber will be printed on the part after a cut is made

This speed can be faster than `FIBER_PRINT_SPEED` as higher speed after cut will not pull the already printed fiber off from the layer.&#x20;

#### **Fiber Cut Offset (`FIBER_CUT_DISTANCE`)**

The distance between nozzle outlet and fiber cut point.

This distance decide when to make the cut in fiber, so the current segment ends exactly with cut fiber portion. Incorrect value here can lead to fiber overlap (if higher) or gap in fiber segments (if lower)

#### **Initial Fiber Extrusion ( `INITIAL_FIBER_EXTRUSION` )**

Extra fiber length to extrude outside the nozzle before starting print.&#x20;

Since sticking fiber on the layer is slightly different than plastic, sometimes extruding an extra distance of fiber on the part before starting fiber print helps fiber stick to the part.&#x20;

#### Fiber Z-hop (`FIBER_Z_HOP)`

The distance by which the nozzle should rise in Z direction before starting next segment.

When printing fiber, extruding fiber just to touch the nozzle tip (or slightly extra as noted by `INITIAL_FIBER_EXTRUSION` value) can be obstructed if the nozzle is just touching the part. In such case, nozzle can be lifted up by `FIBER_Z_HOP` value. Once the fiber is extruded for print start, the nozzle will be brought down to the part and print can progress normally.&#x20;

## Advanced Settings

<figure><img src="/files/kQarDaZvaSpn5PLknStI" alt=""><figcaption><p>C6 - Fiber print advanced settings</p></figcaption></figure>

#### Plastic Wall Count (`PLASTIC_WALL_COUNT`)

Number of plastic walls outside a fiber wall, for each perimeter.&#x20;

When fiber is used to print walls in a layer, plastic walls are printed outside and inside the fiber wall to ensure it is properly encapsulated and also to ensure bonding with infill portion. By default, at least 1 inner plastic wall is printed with a fiber wall. User can control how many plastic walls should be printed outside the fiber wall.

#### Fiber Wall Count (`FIBER_WALL_COUNT`)

Number of fiber walls per perimeter.&#x20;

If a specific wall perimeter length is less than **`FIBER_CUT_DISTANCE`** it cannot accommodate fiber walls. In such case, the same width of wall will be filled with required number of plastic walls.&#x20;

This option is disabled as the **`FIBER_WALL_COUNT`** can be estimated from `PLASTIC_WALL_COUNT` and `FIBER_WALL_COUNT`&#x20;

{% hint style="info" %}
This parameter is directly related to **`WALL_COUNT`** from [Layer Settings ](/modules/print-settings/advanced-settings/layer-settings.md). \
\&#xNAN;**`WALL_COUNT`**= `PLASTIC_WALL_COUNT + FIBER_WALL_COUNT + 1 inner plastic wall`
{% endhint %}

**Continuous Z Print (Vase mode)**

As the option says, this option allows a continuous print without cutting fiber after each layer.

This option can only be used if you are only printing walls of the object, no infill. In this case, the fiber doesn't need to cut. It can seamlessly transition from one layer to another.&#x20;

{% hint style="danger" %}
Using this mode with infill in the part can lead to unexpected results
{% endhint %}

#### Alternate Fiber Layers

When using fiber, this option prints fiber wall/infill every other layer only

This option can be used to increase bonding of fibers by providing a plastic layer between each fiber layer.

**Avoid layers for fiber**

Comma separated list of layers where fiber print should be avoided.

This provides user a custom control to avoid fiber in certain layers.&#x20;


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