Focal length guage

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Gene Uselman
Posts: 895
Joined: Thu Jul 07, 2016 1:18 pm
Location: Suburban Minneapolis, Minnesota, US

Focal length guage

Postby Gene Uselman » Sat Jul 16, 2016 7:37 am

I thought I got this Idea from Russ S. but I must have gotten it on the WWW somewhere- anyway this is my redesign of it and it works very nicely.
The black on the bottom is where my machine normally will focus- you can move it to what ever your focus is. I darkened it with a magic marker for ease of location. I often focus lower (and sometimes higher) for thick substrates and it is easy to check with this gauge. The ribbon I did get from Russ- with a clear gauge- it is easy to lose.

DSC00245.JPG
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focal length guage mm.dxf
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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.

Bodor BCL0605MU w/100w Reci- gone but fondly remembered :D

Vectric Aspire software- FlexiSignPro- vector/bitmap

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Gene Uselman
Posts: 895
Joined: Thu Jul 07, 2016 1:18 pm
Location: Suburban Minneapolis, Minnesota, US

Re: Focal length guage

Postby Gene Uselman » Mon Jul 18, 2016 10:06 am

Actually it was one of Russ' earlier vids- before the Learning Lab series. Mea Culpa.
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.

Bodor BCL0605MU w/100w Reci- gone but fondly remembered :D

Vectric Aspire software- FlexiSignPro- vector/bitmap

User avatar
Gene Uselman
Posts: 895
Joined: Thu Jul 07, 2016 1:18 pm
Location: Suburban Minneapolis, Minnesota, US

Re: Focal length guage

Postby Gene Uselman » Wed Jul 20, 2016 7:28 am

I apparently muffed the export- I work 'mostly' in inches, but RDworks even when loaded in inches- a lot of the stuff is in mm.
I am oldish and sometimes get confused. I will upload the correct file. Sorry and thanks for the poke, I need it. 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.

Bodor BCL0605MU w/100w Reci- gone but fondly remembered :D

Vectric Aspire software- FlexiSignPro- vector/bitmap

User avatar
Gene Uselman
Posts: 895
Joined: Thu Jul 07, 2016 1:18 pm
Location: Suburban Minneapolis, Minnesota, US

Re: Focal length guage

Postby Gene Uselman » Mon Aug 22, 2016 3:53 pm

That seems like quite a FL- what lens do you use? Thanks 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.

Bodor BCL0605MU w/100w Reci- gone but fondly remembered :D

Vectric Aspire software- FlexiSignPro- vector/bitmap

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Keith Sherwin
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Joined: Fri Jun 24, 2016 1:44 pm
Location: Heart of Canada

Re: Focal length guage

Postby Keith Sherwin » Tue Aug 23, 2016 7:26 am

I think Gene meant Focal Length. To do that, just focus the lens, then measure up from the focused surface to the bottom of the lens. That will give you thee "Approximate" Focal Length. The lenses seem to come in 1/2" (12.7 mm) increments:
25.4(1")
38 (1-1/2")
50.8 (2")
63.5 (2-1/2")
76.2 (3")
69 Real (80)Watt Laser w/multi FL lenses. T.L.
Made 5 CNC's, Electronics, Electrical, PLC & Computer background.
:idea: Started this forum - Using RDWorks V8.01.21 on W7 Pro
Lead in creation of the RDWorksLab English Manual.
Crazy Uncle Keith!

User avatar
Keith Sherwin
Site Admin
Posts: 1166
Joined: Fri Jun 24, 2016 1:44 pm
Location: Heart of Canada

Re: Focal length guage

Postby Keith Sherwin » Tue Aug 23, 2016 7:57 am

Interesting method! I think the other method is way easier and you don't need rubber gloves for protection.
69 Real (80)Watt Laser w/multi FL lenses. T.L.
Made 5 CNC's, Electronics, Electrical, PLC & Computer background.
:idea: Started this forum - Using RDWorks V8.01.21 on W7 Pro
Lead in creation of the RDWorksLab English Manual.
Crazy Uncle Keith!


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