Triple REFLECTOR for X6 or C8

For mtb I certainly appreciate the smoother overall beam from a tir. My curiousity compels me to compare them and sometimes I want something more in the center.

So I’ve actually made a triple reflector setup in an X6 using the Noctigon mcpcb. I used the ET D25A reflectors from KD with just a touch of file work on the rim flanges to make them mate and center over the LEDs. I’ll get a pic posted when I can but it’s a great beam. Reflector area is nearly 100% maximized while not having overlapping reflector wells which lead to the dreaded (at least for me) flower pedal spill beams.

Oh… I did have to put an additional spacer underneath the copper adapter that was made for the ledil optic. But that was easy too…

Not trying to dissuade you at all; the reflector beam is nice and better for some applications. But a reflector should throw only a bit better than a TIR. I measured the throw of an XPL HI in a narrow TIR and the SMO S2 reflector and the TIR measured about 87% of the SMO reflector intensity. The honeycomb pattern on the CUTE-3 SS also decreases throw by about 10% compared to a polished version.

Regarding the Ledil cute-3 SS that we usually use with this mcpb, can anyone look up the data sheet and tell me the pcd or the diameter of the inner holes? Is is diameter 17 3*120 degrees? Having trouble opening up PDF on my phone sorry. Help appreciated so I can ask another manufacturer what their triple pcd is.

The spacing for the emitter holes for the 40 mm reflector means that the pcb will have to be wider and therefore further forward, so you’ll have to make some sort of pill so that the emitters have proper thermal contact. Other than that and it almost definitely ending up head heavy, it sounds good.

I found some other reflectors so need the pcd to contact the manufacturer and check what their pcd is rather than buy and test

Yes, it’s 17 x 3*120 with 4.4 ID holes. Same size pcb would work with emitter foot prints nearer the edge. I think the 40 mm was made for an mcpcb using P4 emitters.

Thanks. Manufacturer contacted. They are plastic but will see what they respond

Both the 35 and 40 mm reflectors I purchased from KD arrived and are solid aluminum with emitter holes 3 x 120 on a 15mm circle. The 40 fits my convoy C8(old style w/separate pill) perfectly.

I got the 3 from KaiDomain this past weekend, was out of state for a wedding but will be looking at them this week hopefully. They appear well made, at least…

Nice and solid with reflectors pretty much the full depth. ~13mm for the 35 and ~19mm for the 40 vs ~11mm for the cute-3.

The 40 fits perfectly in a C8 but the 35 won’t fit into the bezel of an X6(neither alu nor SS) without some filing of the reflector lip. Both take the standard SRK metric screw in the center. The emitter holes in the 40 are large enough for an MT-G2 while those in the 35 fit XM size LEDs.

It doesn’t take long to Dremel off 120 degree tangents so that they center. What requires more time is making up buss rings that fit between the reflector and the 3 mcpcb’s or dremeling space for wires into the back of the reflector. An fr4 board with heat pad slots would be better. A single board is possible for XM pads since the space between the /- pads is greater than the minimum slot size. For XP’s it would take two separate boards, one with the pads and the other with the - pads. Both very simple since they’re only copper and no traces, just 3 stop masks and a wire via in each one with the ID of the outer one exceeding the OD of the inner one by the width of the XP heat pad. A copper ring replaces the heat pad and spaces the boards correctly. None of these options is as simple as a DTP copper board with the LEDs on 7.5 mm radius but that’s not likely to happen.

Thin fr4 board with heat pad hole + milled cu plate with hill that will fill this hole is best desicion for small quantity dtp multi-leds pcb IMO.

I agree although it might take a thicker board to get 2 oz copper. With solid pours that might not matter.

Been working on the host a bit. Not done but making progress
Here you can see the bottoms of the 3 –16mm sinkpads. I used the reflector as a jig and used JB weld to join them. It doesn’t stick to ziplock bags so you can peel of the new triple mcpcb once it’s cured(yes, some sanding is required).
In this pic you can see the brass buss bar(triangle) for Led- and the small brass bit that covers the Led+ solder pads as well as the notches in the bottom of the reflector for the wires.
The spacer is similar to the one I made for an SRK clone, a 2mm thick disc brazed to a fitted copper cylinder only this one has a 1/4” thick aluminum disc inserted to add some buffering since it’s a smaller host.
The tapped center hole is so that I can attach it to the stock aluminum pill and assemble the light engine outside of the host.

The wood tube looks nice.

About 5 coats of epoxy nice? They’re very thin coats sanded in between usually with a few days cure time between.

That is looking amazing Rbd. :+1:

Wow, wood worthy wood.
Just a bit of alliteration for you at the end of a long day.