# UI freezes frequently

**URL:** <https://forum.onefinitycnc.com/t/ui-freezes-frequently/17888>\
**Category:** Uncategorized\
**Created:** [January 5, 2023, 6:26pm UTC](https://forum.onefinitycnc.com/t/ui-freezes-frequently/17888 "2023-01-05T18:26:47Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [January 7, 2023, 10:56pm UTC](https://forum.onefinitycnc.com/t/ui-freezes-frequently/17888/5 "2023-01-07T22:56:12Z")

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Hey Brian,

> [@IronCreek](#):
>
> Mine isn’t freezing, but since I added a spindle it goes black intermittently.

This is a new topic, since it’s not the “User interface freezes” issue, but the “[Monitor is intermittent](https://forum.onefinitycnc.com/search?q=monitor%20intermittent)” issue.

> [@Decided to get ferrite cores](https://forum.onefinitycnc.com/t/decided-to-get-ferrite-cores/11217/2):
>
> in the first one would place the [ferrite cores](https://en.wikipedia.org/wiki/Ferrite_bead) on the Monitor’s HDMI cable, best at both ends, especially if you have the [monitor intermittent issue](https://forum.onefinitycnc.com/search?q=monitor%20intermittent).

> [@Decided to get ferrite cores](https://forum.onefinitycnc.com/t/decided-to-get-ferrite-cores/11217/2):
>
> #### Snap-on Ferrite cores for cables
> 
> ![A_collection_of_Snap-On_-_Clamp-on_ferrite_beads__25pct](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/2/6/2669b24835384718e04b2fc7af63c6f98812da2e.png)  
> _– Source: [Unconventional2](https://commons.wikimedia.org/wiki/File:A_collection_of_Snap-On_-_Clamp-on_ferrite_beads.jpg), [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0), via Wikimedia Commons_

If the problem persists, you should be aware that…

> [@349iq2345](#):
>
> a [VFD](https://en.wikipedia.org/wiki/Variable-frequency_drive) and especially its output cable, the cable to the three-phase spindle, **are heavy sources of EMI.** Therefore it is required to use shielded cables, also a VFD is intended to be installed into an earthed [electrical cabinet](https://forum.onefinitycnc.com/t/hey-is-this-your-vfd-enclosure/10130/3). Both should be indicated in your VFD manual, including **which wires to use** , on a page that should look [like shown here](https://forum.onefinitycnc.com/t/what-is-needed-to-wire-up-2-2kw-220v-spindle-and-vfd/11123/2). As you can see there,
> 
> - for the _signal cables_ like used for **ModBus communication** , you should use [shielded](https://en.wikipedia.org/wiki/Shielded_cable), [twisted pair](https://en.wikipedia.org/wiki/Twisted_pair) cable.
> - On the output of the VFD, i.e. the **spindle cable** , you should use shielded **3+[PE](https://en.wikipedia.org/wiki/Protective_earth)** for the three-phase spindle, like shown here:
> 
> ![Spindle_Cable_3+PE_with_shield](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/2X/e/e227edbe91680d9a110b933bcd9fdb81cd454e89.jpeg)  
> _Image 1:_ A typical spindle cable for use in a power chain ([LAPP ÖLFLEX® CLASSIC FD 810 CY](https://products.lappgroup.com/online-catalogue/power-and-control-cables/power-chain-applications/various-applications/oelflex-classic-fd-810-cy.html))

And finally to not only prevent [EMI](https://en.wikipedia.org/wiki/Electromagnetic_interference) but also to comply [EN/IEC 60204-1](https://en.wikipedia.org/wiki/IEC_60204) safety standard, the machine should be [electrically bonded](https://en.wikipedia.org/wiki/Electrical_bonding) and [grounded](https://en.wikipedia.org/wiki/Earthing_system),

- as [described here](https://forum.onefinitycnc.com/t/proper-grounding-how-have-you-grounded-your-frame/12331/22) ←

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