# MY LASER MACHINE IS ttc450 PRO

**URL:** <https://forum.lightburnsoftware.com/t/my-laser-machine-is-ttc450-pro/193825>\
**Category:** LightBurn Software Questions\
**Created:** [November 8, 2026, 11:39am UTC](https://forum.lightburnsoftware.com/t/my-laser-machine-is-ttc450-pro/193825 "2026-11-08T11:39:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![avishory](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/a/c5a1d2/32.png) [@avishory](https://forum.lightburnsoftware.com/u/avishory)\
**Post date:** [November 8, 2026, 11:39am UTC](https://forum.lightburnsoftware.com/t/my-laser-machine-is-ttc450-pro/193825/1 "2026-11-08T11:39:41Z")

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after setting the nachine i found out that no metter the speed set or power set, the machine moving on the same slow speed and not burning at sll.

what can be the reason? thanks

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**Author:** ![ednisley](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/ednisley/32/40455_2.png) [@ednisley](https://forum.lightburnsoftware.com/u/ednisley)\
**Post date:** [November 8, 2026, 1:40pm UTC](https://forum.lightburnsoftware.com/t/my-laser-machine-is-ttc450-pro/193825/2 "2026-11-08T13:40:29Z")

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> [@avishory](#):
>
> the machine moving on the same slow speed

Perhaps the speed units are `mm/min`, rather than `mm/sec`, so it moves at 1/60 the speed you expect:

> **[Layers and Cut Settings - First LightBurn Project - LightBurn User Guide](https://docs.lightburnsoftware.com/2.2/GetStarted/FirstProject/#layers-and-cut-settings)**
>
> One of the best ways to learn to use Lightburn is to use it. We recommend following along with our laser-engraved QR Code WiFi coaster to start exploring LightBurn. By the end, you'll be familiar with LightBurn's user interface and general workflow,...

> [@avishory](#):
>
> not burning at sll

Perhaps there’s a mismatch between the GRBL `$30` value and the LightBurn `S-Value Max` value:

> **[S-Value Max Set Incorrectly - GRBL: Low or No Power Output - LightBurn User...](https://docs.lightburnsoftware.com/2.2/Troubleshooting/JobQuality/GRBLPowerOutput/#s-value-max-set-incorrectly)**
>
> If you've already lowered your speed and are still seeing lower than expected power output, the S-value max setting in the Device Settings window could be incorrect. This number tells LightBurn how to represent 100% power for your machine. Current...

If those don’t improve the situation, more details about your machine and a [screenshot](https://www.take-a-screenshot.org/) of the [layer settings](https://docs.lightburnsoftware.com/2.2/Reference/CutSettingsEditor/) will help us see what you see.

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<div class="post-metadata">

**Author:** ![misken](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/misken/32/47593_2.png) [@misken](https://forum.lightburnsoftware.com/u/misken)\
**Post date:** [November 9, 2026, 9:19pm UTC](https://forum.lightburnsoftware.com/t/my-laser-machine-is-ttc450-pro/193825/3 "2026-11-09T21:19:32Z")

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Additionally, be aware that the ttc is a cnc machine and the mechanics are made for power, not speed. So the realistic maximum is maybe 500-800 mm/min.