CXB 3590 CB Build

Just thought id contribute a bit back to the forum after learning so much. Me and my bro had a bit of time free this week to get all the equipment sorted

The full build will consist of 12 CXB 3590. We bought 3 heat sinks measuring 1200mm X 165mm X 45mm and mounted 4 cobs per heat sink using cob holders. We also bought lenses to go over the cobs to penetrate deeper into the canopy.

Drivers running the cobs are the meanwell hlg-185-1400-B at about 50w per cob - 200 watts per heat sink.
We tested the heat sinks passively in the sun room on a warm day and they got a bit too hot after about an hour of running. The next day the same test was done in a cooler part of the house with just a ceiling fan running and they never got over 30C using an infrared thermometer.

We used a killawatt to measure draw of the panel and it was 211-213 watts which is an accurate draw.

To attach the cob holders initially we was going to tap the holes into the heat sink. Instead we got a 4mm hss drill bit and just used that to drill the holes which was way quicker.

Here are some attached pictures of the panels including the lenses. The light is crazy intense and will have you blinded for sure.

All parts were sourced through Jerry @ kingbrite, and their service was 10/10. I must also give my thanks to Supra, Greengenes and Realstyles for all their type ups and the knowledge they have shared.

Impressive bruce. thank you for sharing.

Im working on a pair of passively cooled 3590 panels. Im waiting on the cobs but i have my drivers hlg h120 c700. I will drive 2 cobs on each panel at .700mA.

Can i ask a few questions please...

Which bin and temp did you select?
what wire did you use to connect the cobs?
did you have any trouble mounting the holders?
what did you use to connect the drivers to the power source.

Fantastic job. Inspiring.

Hey test,
The CD bin was used at 3000k
The wire i will double check as i purchasd about 4 different kinds. Some would not hold securely into the connectors
There was no trouble mounting the holders. I seen a couple videos on youtube. But in the end my bro just used a 4mm hss bit and some self tapping screws.
I used some mains cable 3 core which is very common in the UK. Ill get some additonal photos later this evening.

Thanks bruce. Are your panels grounded?

Those cd bin are not available right now as far as i can tell. Im waiting for 2 pair.

I have the ideal holders coming from newark. Psyched to get those mounted very soon.

Appreciate the details bro

What model lens did you end up ordering?

If cobs are so great, why isn't everyone using them? Oh wait, they are.

Hey bicit, i went with 100mm glass 60 degree lenses (6$each and heavy as fuck) Im not interested in Spread as i have assigned one cob per plant in my setup.
Yea church im hoping to document a side by side hps/cob grow as i normally run 2 600w hps per tent. This time ill be using the cob light on one side and hps on another, same reservoir and same environment.

Test my panels are not grounded yet, but i think i will be doing the soon in the next day or so.

bruce786 said:

Hey bicit, i went with 100mm glass 60 degree lenses (6$each and heavy as fuck) Im not interested in Spread as i have assigned one cob per plant in my setup.
Yea church im hoping to document a side by side hps/cob grow as i normally run 2 600w hps per tent. This time ill be using the cob light on one side and hps on another, same reservoir and same environment.

Test my panels are not grounded yet, but i think i will be doing the soon in the next day or so.

Click to expand...

How's the fit with the 100mm lens? Do you think any of the smaller diameter lenses would fit over the holder?

We finished the final panel yesterday, so i took some more photos on how it all went together. I dont think youd get a good fit on smaller diameter. Maybe 90mm at a really tight fit.

Day 1 veg.

bruce786 said:

Day 1 veg.

Click to expand...

Looking good pulling my seat up

Awesome build man! Do you dim them for veg? Are they 3000K CD bin or was hat a typo for 3500K CD? Do you have a link to that heatsink profile? Thank you for sharing!

Bonjour
Nice job!
What is the numbers of fins on your h.s. it is interested me cause mine is 1000X165X35 with 14 fins for the same amount of cob and the same driver, but i cut it in 4 pieces and I will had a 140mm fan on each! So maybe a smaller fan will do the job, but it is very hot where i live so maybe i will stick to 140mm and dimmed it as the heat will rise?!?
Have a great day ★

SupraSPL said:

Awesome build man! Do you dim them for veg? Are they 3000K CD bin or was hat a typo for 3500K CD? Do you have a link to that heatsink profile? Thank you for sharing!

Click to expand...

Hey Supra, we did want to dim, but havent got our heads round the process, we know we need a potentiometer for the driver but as we have 3 drivers running do we use 100k per driver? Im pretty sure we used 3000k, I will double check.

littlejacob said:

Bonjour
Nice job!
What is the numbers of fins on your h.s. it is interested me cause mine is 1000X165X35 with 14 fins for the same amount of cob and the same driver, but i cut it in 4 pieces and I will had a 140mm fan on each! So maybe a smaller fan will do the job, but it is very hot where i live so maybe i will stick to 140mm and dimmed it as the heat will rise?!?
Have a great day ★

Click to expand...

I think i have 14 fins again i will double check that. I use the grow room fans to cool the heatsinks as there is ample airflow for the plants. Saves the headache of adapters and wiring. Our heatsinks get warm but not uncomfortably hot and this is our summer at the moment. This will be a sort of head to head, as the its a 600w led vs 600w hps. Clones are the same and also the Reservoir there feeding from is the same. Hopefully once this is done we may upgrade all the fixtures to led.

Thanks

You are correct 100K per driver for individual dimming for each driver. Watch out for rogue pots that may be under 100K I came across an 87K yesterday but most are 100 or above. It is OK if they are above.

If you want to control all 3 drivers with one knoby, ou could use a 50K. 33K is what you would need to get adjustment across the whole range of the knob, but 50K pot is the closest and you will get driver dimming from 0-100%

You could use a 25K pot and add 8K of resistors. That would give you adjustment across the full range of the knob and driver dimming from 25% to 100%

Just wondering does any1 have thread of how to connect the patentiometer to the meanwell drivers? The reason asking cuz on the dimming wires there a blue and white wire and on the 100k there no + or - so not sure wat to do

Doesnt matter which pin gets which color. So if you use pin 1 and 2, it will dim when turned counter clockwise. If you use pin 2 and 3 it will dim when turned clockwise. To control multiple drivers connect the white dimming wires together on one pin and the blue wires together on the other pin (parallel wiring).

If you run the driver without a POT, it will output its maximum current.

xinfin said:

Just wondering does any1 have thread of how to connect the patentiometer to the meanwell drivers? The reason asking cuz on the dimming wires there a blue and white wire and on the 100k there no + or - so not sure wat to do

Click to expand...

Resistance do not care for + or -. They just do their resisting job either way.
Connect the drivers dim + Blue or dim - White to the middle post of potentiometer and the other one of the end of the potentiometer

Edit: read Supra's post i guess it makes sense to connect the all white together all blues together if they share a potentiometer

Awesome reply people great help understand now thumbs up

I have just ordered 1 from eBay hopefully be able to dim all three meanwell drivers
C1400b thanks for the advice il let you how get on.