MF01 Mini / MT07- Mod/Upgrade - Copper Heatsink Cover Plate - 1st batch shipped - 2nd in production

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man of light
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For everyone interested, today I updated the post #1 and post #2 with some news on the Status and the 2nd batch.
Please take a look for the latest infos.

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Gerrit
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It works great, done in 15 minutes. Thumbs Up

deus1ex
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Interest in one

Lexel
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Thermal test now done

Test conditions:
driver temp sensor on PCB calibrated
set to 50°C
Full AMC heating at 2.4A

Time lapse x5 almost 5 minutes

I found that stock the Anduril firmware seem to quite regulating after first throttle, it may get into unsafe temperatures
In an assembled light a lot of the heat will be conducted away from battery tube, so the bare AMCs will stay a bit cooler
and the AMC heat spreader will stay quite a lot cooler than in this test

1. tested stock upper left
it seems after first throttle the temperature regulation quits and it heats up to 70°C on PCB

2. Aluminum prototype
lower left

3. production sample copper

middle upper and lower

gchart
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Great comparison, Lexel. The clamp meter is a bit hard to read in the copper spreader test, but it looks like it stays around 2.4A perhaps? Aluminum doesn’t appear to be too far behind, but definitely better than running it bare.

man of light
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Lexel wrote:
Thermal test now done

Thanks for the test Lexel, great Job Thumbs Up

As expected, the temperatures on the copper version stays a bit lower than on the aluminum version.
Also the heat distribution between the heatsink and the head seems to be best balanced on the copper version.

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Lexel
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Yes with both heat spreaders in those 5 minutes the light ran constant, the clamp meter sometimes is acting bad not reading correct or fluctuating a bit, I may have to open it and clean

I am not sure how the temperature is affected in the total light assembly
with it the temperature is definitely a lot lower as the driver gets most cooling connection to the battery tube

But the strange behavior when thermal throttling should be history

Still it seems there is a bug in the firmware when it ran without heat spreader Anduril kept going almost at 100% while the light constantly heated up far behind the set point

moonstone4
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I am interested in 2 of them.

olles
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Thanks for making a second batch!
Olles

ZozzV6
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man of light you can add my post link to the OP where I have images of thermal paste and silicone heat pad images added Wink

Alvaro52021
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Interested!!! How can i get one of those!?? Thank you

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Interested in 1

man of light
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ZozzV6 wrote:
man of light you can add my post link to the OP where I have images of thermal paste and silicone heat pad images added Wink

Good idea Zozz, I’ve just added an alternative method of thermal contacting using thermal pads in the description of post #1 with a link to your post.

I also mentioned and linked the thermal test from Lexel in the OP.

Alvaro52021 wrote:
Interested!!! How can i get one of those!?? Thank you

Welcom to BLF, I’ve just answered your PM with some information and added you to the list of the 2nd batch.

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nobody
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ZozzV6 wrote:
So you need to make sure you use enough thermal transfer materials and I suggest using 0,5-1mm silicone thermal pads cutted shape on the 7135 top.

Just for clarification (maybe I missed something), you have pictures with the thermal pad on top of the 7135 chips and a picture with the thermal pad on the bottom of the copper plate.  Do you recommend putting it in both places or is one better than the other?

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nobody wrote:

ZozzV6 wrote:
So you need to make sure you use enough thermal transfer materials and I suggest using 0,5-1mm silicone thermal pads cutted shape on the 7135 top.

Just for clarification (maybe I missed something), you have pictures with the thermal pad on top of the 7135 chips and a picture with the thermal pad on the bottom of the copper plate.  Do you recommend putting it in both places or is one better than the other?


Not necessary. Those two pictures are two different try. Even if you add layers you make the thermal path worse. The second and current one is where I putted the thermal pad on the copper thing and cutted it exactly the shape it has. And I used thermap paste on the side of it. Then grabbed it with tweezers to put it in place.
nobody
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Got it. Thanks. 

mihlit
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Interested in 1 piece

MoreLumens
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Hmm so which one is better; thermal paste or with pads?

noboneshotdog
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MoreLumens wrote:
Hmm so which one is better; thermal paste or with pads?

Yes, please let us know. I was planning on paste…..

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gman7228
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Please put me down for two from the second batch. Thanks!

gman7228

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MoreLumens wrote:
Hmm so which one is better; thermal paste or with pads?

For me the combination of the two worked best this way:


MoreLumens
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ZozzV6 wrote:
MoreLumens wrote:
Hmm so which one is better; thermal paste or with pads?
For me the combination of the two worked best this way:

Im leaning on that option too, but I would need to get some thermal pads for that and the end result is that I would almost double the price of this light with all these mods. Totally worth it though, but still need to find good thermal pads. Anyone has some advices where to get some?

man of light
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noboneshotdog wrote:
MoreLumens wrote:
Hmm so which one is better; thermal paste or with pads?

Yes, please let us know. I was planning on paste…..

The heatsink plate is generally designed for usage with thermal compound paste, I would still recommend to use it this way.

Both thermal contacting methods will work well, if the installation is properly done and there will be no differences in the runtime performance or thermal effectiveness.

Good quality thermal pads are mostly more expensive than a high quality thermal compound paste.

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MoreLumens
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Ok then I stick with paste. Thanks for everything!

Malenurse84
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I will take 2 of them

freshnight
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I’ll take one !

Chinaheart
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Dr.Phillip
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I received mine, 3 pieces. Thank you man of light. Will install them after I flash it later. Hopefully I’ll post some pics as well. They look great! Thumbs Up

gecco
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If I have the lamp and the copper plate, I consider whether I should use a graphite cooling pad instead of the MX4 paste because of the mess when I open the lamp again, what do you think.
Graphite cooling pad should conduct better than a thermopad?.
What is the distance between the copper plate and the housing?

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Dr.Phillip
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gecco wrote:
If I have the lamp and the copper plate, I consider whether I should use a graphite cooling pad instead of the MX4 paste because of the mess when I open the lamp again, what do you think. Graphite cooling pad should conduct better than a thermopad?. What is the distance between the copper plate and the housing?

Graphite pads are electrically conductive, might not be a problem in large CPUs where you just cut them short near the edge of the professor, but it might be a problem with this small AMCs. Plus it might be hard getting them to touch the copper and all chips without touching the PCB and any component they might short.

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