# Extruder

## Grinding: One Side Keeps Grinding.

### Problem

Only left or right side of my extruder keeps stripping when extruding.

### Solution

#### Wall-E may be tightened, in a skewed position.

Make sure both ports have filament inserted.

Loosen all three M4 screws.

![](/files/-LPCldhj-8bt3t_VdDMS)

Look for a shift in the Wall-E position, when loosening. The Wall-E should shift into its natural position, if not already all there.

Lightly tighten the all M4 screws.

Extrude again for 400 mm (minimum). Look for a grinding.

If still skipping, continue reading. 

#### There may be artifacts or clogging in your filament path.

Remove the Wall-E. Follow the [Uninstall Extruder](/repair-and-maintenance/install-uninstall/extruder.md#how-to-uninstall) guide.

Remove the plastic insert: [K'Tana](/documentation/mechanical-systems/single-ktana.md#back-components) or [Compound](/documentation/mechanical-systems/compound-mixing.md#back-components).

Look for artifacts.

![](/files/-LPCljSQhVD31ew5B5GT)

If it's a clog, follow the [Unclogging Nozzle](/repair-and-maintenance/unclogging-the-nozzle.md) guide.

## Skipping: No Extrusion. All Skipping.

### Problem

I hit extrude. Nothing comes out.

OR

I hit extrude. Only one side extrudes.

### Solution

#### There may be artifacts in your filament path.

Remove the Wall-E. Follow the [Uninstall Extruder](/repair-and-maintenance/install-uninstall/extruder.md#how-to-uninstall) guide.

Remove the plastic insert: [K'Tana](/documentation/mechanical-systems/single-ktana.md#back-components) or [Compound](/documentation/mechanical-systems/compound-mixing.md#back-components).

Look for artifacts.

![#1 is a clog. #2 is an artifact.](/files/-LPCljSQhVD31ew5B5GT)

If it's a clog, follow the [Unclogging Nozzle](/repair-and-maintenance/unclogging-the-nozzle.md) guide.

## Skipping: Extrudes, but Skips

### Problem

I am extruding and keep hearing skipping sounds.

### Solution

#### Check your extrusion settings.

Run:

```
M92; Displays motor steps.
M906; Displays current motor settings.
M350; Displays microstepping settings. 
```

#### Let's check the results with ones below.

***Compound Mixing*** Expected Settings:

```
E Motor Steps: E195.0:191.5:####:####
Motor Current: E400:400:####:####
Microstepping: E128:128:####:####
```

***Single K'Tana*** Expected Settings:

```
E Motor Steps: E198.82:197.00:####:####
Motor Current: E400:400:####:####
Microstepping: E128:128:####:####
```


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