# Y-Motor Replacement

{% hint style="warning" %}

### Repair guides are to be used when directed by Voltera Support only!

**Performing these without Voltera Support's direction could be the wrong resolution path for your issue and could cause damage to your machine. If you haven't been in contact with Voltera Support about your issue please email <support@voltera.io> or reach out in the chat before proceeding.**
{% endhint %}

## Before you begin

This guide will take you through replacing the Y-motor in NOVA. Before beginning this guide you should have been in contact with our support team and received replacement parts.

{% hint style="warning" %}
**Safety first!** Before starting any repair, take a moment to review the [safety information in your user manual.](https://docs.voltera.io/docs/nova/downloads/nova-user-manual) An online version of the guidelines can also be found [here.](https://docs.voltera.io/docs/nova/getting-started/safety-guidelines)
{% endhint %}

As you work through this guide please reach out to our email <support@voltera.io> or through the chat if you run into any issues or have any questions. We are more than happy to assist you virtually with this repair.&#x20;

{% hint style="success" %}
**When in doubt, reach out!**
{% endhint %}

#### Estimated Repair Time:

* 60 minutes

#### Tools you will need:

* T20 Torx bit + screwdriver&#x20;
* 2.5 mm and 4 mm hex keys

#### Parts & Fixtures you have received from Voltera:

* Y-motor
* Extra mounting screws and washers (if needed)
* Dial gauge and mounting fixture
* Belt tensioner

## Replace the Y-Motor

{% stepper %}
{% step %}

### Disconnect NOVA from power

Ensure that NOVA is turned off with the power button and then unplug the power cable.

<figure><img src="https://lh7-rt.googleusercontent.com/slidesz/AGV_vUfemsBggVvQ8Ff_ZVNRTmpkd158WPpBQ0B7CNAqRBrfkR_C0BAvXNGywtz5_gZki5GWEYspOsjUTN3nnPTMo00ktidX4Qc5NInz_X71B5vyUwBeWMLrLROkIDL03cMfzRGM1mBhnA=nw?key=FyXWpw1YygHPFuhH-bIybD7L" alt="" width="375"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Remove the backplate

With a T20 Torx bit remove the 6 screws (2 on the back side, 4 on the bottom of the panel) securing the back panel. Once the screws are out you can pull the back panel out by tilting it up slightly and then pulling away from the machine.

<figure><img src="https://lh7-rt.googleusercontent.com/slidesz/AGV_vUeO6-HkfCE3zIxQr-_WtjKVnlmS5M-R3yajPiDXrqERn6Ut6NxOmw_3whIbhy_ktuR-K0_s6sRbs48nIQKqciC35oejbpM3Z8SMHcuKrdYPWPtRFmWvO7IjjV6ltlKWcY9xXkMs0g=nw?key=FyXWpw1YygHPFuhH-bIybD7L" alt=""><figcaption></figcaption></figure>

{% embed url="<https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FYKzrL5Rz2l0ufpEa39Yc%2Fuploads%2FggfE1jiHZSVl0wYG2Ysu%2FIMG_6192.mp4?alt=media&token=ecce98f3-10a0-468e-bf24-b9ce93116546>" %}
{% endstep %}

{% step %}

### Locate the Y-motor

Now that the back panel is off locate the Y-motor in the bottom right corner of NOVA.

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/OCMAmHricuwRTKYyXJve/image.png" alt=""><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Remove the old Y-motor

Use the 2.5mm hex key to remove the 4 screws and washers securing the motor to NOVAs body and remove the old motor.

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/LCuDWOh3JGlOaxQWVt65/image.png" alt=""><figcaption></figcaption></figure>

Disconnect the motor from the cable by wiggling it out (it has no locking tab or latch).

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/tL8ggYeEuKsj78tA6o7z/image.png" alt=""><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Insert the new Y-motor

Take the new Y-motor and plug in the cable. Insert the motor into the mounting bracket.

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/wPOKE205EEK5bXqZBogx/image.png" alt=""><figcaption></figcaption></figure>

Using the 2.5mm hex key, loosely secure the motor in place with the 4 screws and washers.&#x20;

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/8E9xoVzbrSj5U1XAYkPL/image.png" alt=""><figcaption></figcaption></figure>

Place the belt over the y-motor pulley and ensure that the teeth of the belt are fully engaged with pulley. Now roll the belt over the larger pulley to fully seat the belt.

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/8GkbdJqqPSMBPRAa7JNu/image.png" alt=""><figcaption></figcaption></figure>

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/VTZUCJXpuu8KhbPsG1E2/Y%20belt.gif" alt=""><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Tension the Y belt

{% tabs %}
{% tab title="With the Belt Tensioner" %}
Install the belt tensioner by positioning it between the upper and lower pulleys, then secure it by turning the screw clockwise.

<figure><img src="https://907254262-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FUg3mbo6FhPbGOGvlUwTu%2Fuploads%2FW2aSdQitbMtyDKIzZZrL%2FBelt%20tension.gif?alt=media&#x26;token=ec9db050-dd90-41f2-bfb4-f5bda407b91b" alt=""><figcaption></figcaption></figure>

Using your phone and an online chromatic tuner, pluck the Y belt like a guitar string. The measured frequency should be between **274–293 Hz**.

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/ILpMj9x4jjuCs68L1vVV/image.png" alt=""><figcaption></figcaption></figure>

Turn the belt tensioner screw to increase or decrease the tension until the belt falls within the correct frequency range. Once the correct tension is achieved, tighten all four mounting screws. Then, loosen the belt tensioning tool and double-check the tension with your phone to confirm it remains within **274–293 Hz**.

<figure><img src="https://907254262-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FUg3mbo6FhPbGOGvlUwTu%2Fuploads%2F3pWtcMLMDfWJLBjjh7rT%2Fimage.png?alt=media&#x26;token=aeefcdd4-4969-4ec5-8de4-6fedaf27c168" alt=""><figcaption></figcaption></figure>
{% endtab %}

{% tab title="Without the Belt Tensioner" %}
Using a second hex key push down on the top of the motor body to apply tension to the belt and tighten two of the four screws.

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/eWvKwfWXZrHzMPy7m8Ov/image.png" alt=""><figcaption></figcaption></figure>

Using your phone and an online chromatic tuner, pluck the Y belt like a guitar string. The measured frequency should be between **274–293 Hz**.

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/ILpMj9x4jjuCs68L1vVV/image.png" alt=""><figcaption></figcaption></figure>

Apply downward force on the top of the motor to increase the tension until the belt falls within the correct frequency range. Once the correct tension is achieved, tighten all four mounting screws. Then, loosen the belt tensioning tool and double-check the tension with your phone to confirm it remains within **274–293 Hz**.

<figure><img src="https://907254262-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FUg3mbo6FhPbGOGvlUwTu%2Fuploads%2FKd16AzEWtZtJxSnqZbwf%2Fimage.png?alt=media&#x26;token=9fcffd23-a45d-4433-8b9c-ab7831772da6" alt=""><figcaption></figcaption></figure>
{% endtab %}
{% endtabs %}
{% endstep %}

{% step %}

### Reattach the backplate

Put the back plate back into place and with a T20 Torx bit secure the 6 screws (2 on the back side, 4 on the bottom of the panel).

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/G1k6Sfzr4f2WIZtWAoaz/image.png" alt=""><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Turn NOVA back on!

You can now plug NOVA back in and turn it on using the power button.
{% endstep %}
{% endstepper %}

## Calibrate the Y-motor

Now that we have replaced the Y-motor we need to recalibrate NOVAs Y axis. To do this we will be using a dial gauge to measure NOVAs step size movement in the Y axis.&#x20;

{% stepper %}
{% step %}

### Install the Calibration Fixture

Attach the T shaped mounting fixture to the mounting grid at the below location, four mounting holes from the front. Use a 4mm hex key to tighten down the two bolts and secure the fixture.&#x20;

{% hint style="danger" %}
**It is critical that the jig is in the exact position as it could result in a machine crash otherwise**
{% endhint %}

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/kxrbwhayEWI4OJqUjV8P/image.png" alt=""><figcaption></figcaption></figure>

Attach the dial gauge to the T fixture by engaging the tool port lever. Now turn on the dial gauge by pressing the green on/off button and zero the dial gauge by pressing and holding the origin button.&#x20;

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/cKsw3PdeoFafPXvlEr7X/image.png" alt="" width="349"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Run the Calibration Command

Open the console by clicking the **\~ key** and copy the below command block into the console. The command moves the tool mount forward and backwards in 1 mm increments; the goal is to find the difference between each shift and the absolute value is the compensation value.

```
M507 Y0;
G28;
V2 T0 X37 Y47;
G01 C-1;
G04 P3500;
V2 T0 Y25;
(V2 T0 Y1 F500; G04 P3500;
V2 T0 Y-1 F500; G04 P3500;)*10;
G28;
```

As NOVA moves back and forth take note of the values on the dial gauge focusing on the decimals. It can be helpful to take a video of the dial gauge to review the measurements after the test or have a second person reading out the numbers as it goes.&#x20;

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/EtL7BgVbWPd3GURuTmyt/Y%20backlash%20Bad.gif" alt=""><figcaption></figcaption></figure>

Again, we are calculating the difference between each shift and the absolute value will be our compensation value.

{% hint style="info" %}
Ex. The machine moves to 4.442 than 5.432. The compensation value would be 0.010 mm.
{% endhint %}

Once you have calculated the compensation value you can enter it in the console with the command below replacing the 'X' with your unique value.

```
M507 Y0.0XX
```

A compensation of 0.015 mm will look like the image below when entered into the console:

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/UfuAauMs5bRSWiM8bXPx/image.png" alt=""><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Confirm Calibration Value

You can confirm that your compensation value is correct by entering this command block into the console and taking note of the difference between each 1 mm shift.

{% hint style="warning" %}
Any step movement difference under 0.020 mm is acceptable for this axis.&#x20;
{% endhint %}

```
G28;
V2 T0 X37 Y47;
G01 C-1;
G04 P3500;
V2 T0 Y25;
(V2 T0 Y1 F500; G04 P3500;
V2 T0 Y-1 F500; G04 P3500;)*10;
G28;
```

<figure><img src="https://content.gitbook.com/content/Ug3mbo6FhPbGOGvlUwTu/blobs/0tDWchFxUKL4NapndPpK/Y%20backlash.gif" alt=""><figcaption></figcaption></figure>

Repeat steps 2 and 3 until the calibration value is acceptable.&#x20;
{% endstep %}

{% step %}

### Remove the Calibration Fixture

Remove the dial gauge and mounting fixture using a 4mm hex key.
{% endstep %}
{% endstepper %}

## Repair Complete!

Congratulations, you have successfully replaced NOVAs Y-motor!

Please reach back out to our support team through email (<support@voltera.io>) or the chat to let them know everything went well. We will arrange a shipping label to return the old parts and calibration jig back to us for further testing.