# Laser Head
**URL:** https://forum.cloudray.com/c/co2-laser-cutting-engraving/laser-head/41.md
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## [About the Laser Head category](https://forum.cloudray.com/t/about-the-laser-head-category/72)
**Author:** [@Technician](https://forum.cloudray.com/u/Technician)\
**Replies:** 0
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## [How to choose the right nozzle of fiber laser cutting machine](https://forum.cloudray.com/t/how-to-choose-the-right-nozzle-of-fiber-laser-cutting-machine/491)
**Author:** [@Polaris](https://forum.cloudray.com/u/Polaris)\
**Replies:** 0\
**Last updated:** [August 7, 2021, 6:58am UTC](https://forum.cloudray.com/t/how-to-choose-the-right-nozzle-of-fiber-laser-cutting-machine/491 "2021-08-07T06:58:32Z")
The nozzle of the laser cutting machine can assist the rapid ejection of gas, and it can control the area and size of gas diffusion, which will affect the cutting quality of the laser cutting machine. The user selects t…
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## [New user to CO2 engraving](https://forum.cloudray.com/t/new-user-to-co2-engraving/470)
**Author:** [@IconicLaserEngraving](https://forum.cloudray.com/u/IconicLaserEngraving)\
**Replies:** 7\
**Last updated:** [July 29, 2021, 5:34am UTC](https://forum.cloudray.com/t/new-user-to-co2-engraving/470 "2021-07-29T05:34:27Z")
Good Day here from South Africa. I’m just received my new lenses from Cloudray. 20mm FL38.1 , 50.8 and 101.6. Now I’m in trouble, only have the FL63.5 lens tube and my nozzle is 45mm. Can you please help me in selecti…
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## [Installing E-Series Laser Head . . . and 1.5 lens](https://forum.cloudray.com/t/installing-e-series-laser-head-and-1-5-lens/461)
**Author:** [@JBrondos](https://forum.cloudray.com/u/JBrondos)\
**Replies:** 5\
**Last updated:** [July 19, 2021, 7:08am UTC](https://forum.cloudray.com/t/installing-e-series-laser-head-and-1-5-lens/461 "2021-07-19T07:08:46Z")
I purchased a red CloudRay E Series laser head (through AliBaba) to replace the stock unit on my red-and-black Chinese 80W laser. It looks like the installation should be fairly simple, but I wonder if there are any ins…
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## [Consider the different installation methods when replacing the laser head](https://forum.cloudray.com/t/consider-the-different-installation-methods-when-replacing-the-laser-head/312)
**Author:** [@Technician](https://forum.cloudray.com/u/Technician)\
**Replies:** 0\
**Last updated:** [April 21, 2021, 2:35am UTC](https://forum.cloudray.com/t/consider-the-different-installation-methods-when-replacing-the-laser-head/312 "2021-04-21T02:35:34Z")
1.Problem description: I already have the installation structure diagram of the old laser head. I want to upgrade the laser head. Is the series external sliding suitable? 2.Analysis:Not suitable, this is an external …
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## [Only the mixed cutting head does not have the mixed cutting suit. Now you need a focusing lens. The focal length on the detail page is 63.5-101.6mm, while the focal length on the mixed cut package is 63.5mm. How to choose](https://forum.cloudray.com/t/only-the-mixed-cutting-head-does-not-have-the-mixed-cutting-suit-now-you-need-a-focusing-lens-the-focal-length-on-the-detail-page-is-63-5-101-6mm-while-the-focal-length-on-the-mixed-cut-package-is-63-5mm-how-to-choose/309)
**Author:** [@Technician](https://forum.cloudray.com/u/Technician)\
**Replies:** 0\
**Last updated:** [April 21, 2021, 2:12am UTC](https://forum.cloudray.com/t/only-the-mixed-cutting-head-does-not-have-the-mixed-cutting-suit-now-you-need-a-focusing-lens-the-focal-length-on-the-detail-page-is-63-5-101-6mm-while-the-focal-length-on-the-mixed-cut-package-is-63-5mm-how-to-choose/309 "2021-04-21T02:12:04Z")
Non-metal is carbon dioxide cutting, metal is fiber cutting, the corresponding focusing lens is 10.6 and 1064; short focal length is used for cutting metal, long focal length is suitable for cutting thick non-metal.
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## [Where is the water injection port in the drawing?](https://forum.cloudray.com/t/where-is-the-water-injection-port-in-the-drawing/308)
**Author:** [@Technician](https://forum.cloudray.com/u/Technician)\
**Replies:** 0\
**Last updated:** [April 21, 2021, 1:46am UTC](https://forum.cloudray.com/t/where-is-the-water-injection-port-in-the-drawing/308 "2021-04-21T01:46:25Z")
Analysis:This type is air cooling, no water cooling, and the red area is the amplifier interface.
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## [Is there a built-in motor in the non-metal cutting head?](https://forum.cloudray.com/t/is-there-a-built-in-motor-in-the-non-metal-cutting-head/307)
**Author:** [@Technician](https://forum.cloudray.com/u/Technician)\
**Replies:** 0\
**Last updated:** [April 21, 2021, 1:42am UTC](https://forum.cloudray.com/t/is-there-a-built-in-motor-in-the-non-metal-cutting-head/307 "2021-04-21T01:42:41Z")
No.