Lens Issue

Hardware settings, adjustments and fixes and other hardware discussion. This includes the "doHICky" Laser Power measurement system by Russ.
Nathan Hunsworth
Posts: 40
Joined: Sun Dec 11, 2016 10:55 am
Location: London, UK

Lens Issue

Postby Nathan Hunsworth » Mon Jan 09, 2017 12:29 pm

Evening all, you would not believe the luck I am having, after a full rewire of the laser cutter and I do mean full.over the holidays and a replacement controller. Loads of thanks and appreciation to Keith and all on here for the support while doing all this troubleshooting.

I have finally got around to running some small test jobs on the cutter to see how it performs and noticed it was having real issues cutting 4mm acrylic. So a full check or everything I found the following


So question if I am going to replace this any recommendations, the diameter is 18mm.

Have found the following, any thoughts or recommendations


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X700 Clone (eBay) 60W, 700mm x 500mm, T.R.
RDWorks V8.01.19 on Windows 10.

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Gene Uselman
Posts: 785
Joined: Thu Jul 07, 2016 1:18 pm
Location: Suburban Minneapolis, Minnesota, US

Re: Lens Issue

Postby Gene Uselman » Mon Jan 09, 2017 12:49 pm

Do you know for a fact that you have a 2" (50.xmm) lens? Beyond that- with my 130w laser I use cheap lenses from all different sources and don't notice a lot of difference (I buy a couple at a time as they are expendable)- with a low power laser I believe a HQ lens will work better (less loss) at 2-2.5x the price. It kinda depends on if you feel your power is adequate. Your laser almost certainly came with a cheap lens so hopefully you got to try it out enough to get a feel for how much power you had cutting what you are likely to cut. Gene
Gene- 130W 1300x900 China Laser with 2" FL lens
V8.01.19 RDWorks on Win 7 pro
500mm Z, blade table machine home is upper right.

100W Reci tube in a Bodor BCL0605MU V8.01.19
600x500x 200Z, SS table, 2" FL- mach home upper right
Vectric Aspire software- FlexiSignPro- vector/bitmap

Nathan Hunsworth
Posts: 40
Joined: Sun Dec 11, 2016 10:55 am
Location: London, UK

Re: Lens Issue

Postby Nathan Hunsworth » Mon Jan 09, 2017 12:58 pm


Thanks I know it was a 2" FL Lens as before the controller died at Christmas I had done a number of tests and worked it out.

Will see what others are out there
X700 Clone (eBay) 60W, 700mm x 500mm, T.R.
RDWorks V8.01.19 on Windows 10.

Alexis Tzoulis
Posts: 88
Joined: Thu Oct 06, 2016 5:03 pm
Location: Greece

Re: Lens Issue

Postby Alexis Tzoulis » Wed Jan 11, 2017 2:07 am

I bought a HQ 1.5'' lens from cnccheap and after a month lens became blurry.
KH-7050 60w (50w real) (700mmx500mm) redsail clone TR
Ruida 6442G controller - MYJG-60W power supply - 1000mm/50mm co2 tube
RDWorks V8.01.19 - corel draw x8 - windows 10

Doug Fisher
Posts: 286
Joined: Sat Aug 20, 2016 10:42 am
Location: Atlanta, Georgia, USA

Re: Lens Issue

Postby Doug Fisher » Wed Jan 11, 2017 6:21 am

You might talk to the people at Light Objects and ask them what you get for the different price points. They seem to be reputable if you are willing to pay a little more for a domestic seller. You just never know what you will get ordering from unknown sellers on ebay, amazon and alibaba.
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment

Michael Dunning
Posts: 42
Joined: Sat Nov 26, 2016 11:02 pm
Location: Alabama USA

Re: Lens Issue

Postby Michael Dunning » Wed Jan 11, 2017 12:37 pm

This is the vendor I have used for both my 1.5" and 2.0" HQ lenses. So far I've been happy.

EBay Chinese 60W (45W actual) laser cutter, 700x500mm, (TR)
RDWorks V8.01.18 and V8.00.27

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