86mm kaidomain reflectors for xhp35hi
Nice job on the cut outs grin.
That reflector array looks amazing!
I’m inspired by this thread! I’m looking at a big, vintage enlarging lens on eBay right now, might be rubbish for making a thrower, but I want to have a go anyway!
Thanks, it is good to see someone get something from my ramblings. I have found an article on light collection and collimation that can explain better than I. https://www.newport.com/t/light-collection-and-systems-throughput
The reflectors are a follow on from my OL competition light. I want to get the process of cutting and finishing the reflectors right before I start the big build. So for this one I made a simple jig to put in the metal cutoff bandsaw.
MRsDNF I was cleaning up at work and they told me to throw a pallet of these in the scrap bin I think they are cutters from a horizontal mill. They are brand new except for the bottom left which I got to make a flail or mace. Anyway before I set my lathe up to try it would they be any good to dress the reflectors? The bandsaw cut isnt perfectly straight.
I’d try and use a fine file or emery on a flat surface. I’ve seen some use an emery wheel on a grinder but dont have one of those. One day. I thought your cuts looked really neat. A lot better than I could have achieved.
I did mill some small reflectors like you have cut and holding them in a vice, even gently they tend to warp.
Saying all that your doing a terrific job. 
The quad has been put on hold since I put the leds and boards on the gas burner and walked outside the boards and leds got burnt 
So at the request of another BLFer I have been adapting the 150mm lens I made before and wasnt going to work on that light to a GT90.
Bummer. I was looking forward to that quad.
That pic of the GT’s is a little deceptive. Never owned a GT but I know what 150mm stormwater pipe looks like. That light is not small 
Quad wont be far off.
The GT with 150mm lens is huge and heavy but surprisingly well balanced. Outside is finished except for polish. It will be a 3 element lens train and I still have one internal carrier to build. I will post internals dimensions and lens when it is focused properly.
O….M……G……
I just love coming in here every week to see what craziness you are cooking up! You never fail to please 
No wonder your username is grin!
Keep it up man! I’m fairly sure soon you’ll be responsible for attracting aliens with these crazy beams 
I second this. I really love what you’re doing.
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And I third this :+1:
Great Job Grin !!
A barrel full of chips, I bet.
Nice!
What are the two lens you used for this?
What was the estimated spacing for both lens in reference to the LED?
There are 3 elements 40mmx40mm FL, 75mmx150mm FL, 150mmx300mm FL. I used 3 elements to get the focal length short enough to focus it properly. The 40mm is as close as possible to the led to collect the light. The 75mm takes this light and shapes it for the 150mm to throw down the paddock. I have made the intermediate lens adjustable to allow for focus without changing the outside dimensions. Some photos wil explain better
Amazing work there Grin. Well done.
That’s a great design and build, it is an amazing light beam.
How did you hold the tapered cone in the lathe to cut both inner and outer fine threads at the small end? Plus all the collars and thin lock rings with fine threads? You are a master at precision machine work.
One reason I'm not a modder:
I don't like to get my hands dirty. 
Thanks, there was some trial and error to get it right and it will look better anodized.
Kennybobby many many times I have stuffed parts by not getting the sequence right you end up not having any way of holding it. So to cut the internals of the cone I left a ridge at the base for the chuck to grip.
Raccon city even when I get them clean they are still covered in cuts, scratches and scars. After leaving construction 13years ago and not swinging a hammer every day I still have callouses on my hands.
I got one interesting beam pattern when I was working out the focus. What i think was happening is the lens closest to the led was in focus and creating two beams.
