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Old 08-23-2014, 12:32 AM #1
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Default Heat sinking for an x-drive?

Hello all,

As you all know the x-drive is a rectangular shape and I have mine set at 3.5 amps. Running it this high really needs heat sinking although I do not know the best way to do this. I read that you can just epoxy on a slab of copper but that seems very crude unless you fin it. What would you guys do?

Right now I am leaning toward epoxying the driver to the host but his might make it difficult to remove.


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Old 08-23-2014, 12:43 AM #2
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Default Re: Heat sinking for an x-drive?

You can either epoxy a chunk (or finned, obviously) of copper or aluminum- copper being preferred. Or you could epoxy it right to the host like you said- a third option would be to epoxy a heatsink to the driver, then said heatsink to the host. That might make it a bit easier to remove.
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Old 08-23-2014, 12:52 AM #3
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Default Re: Heat sinking for an x-drive?

I'm considering doing this to a lab style build I'm about to do for safety. What part of the driver do you attach the heat sink to ? Thanks in advance
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Old 08-23-2014, 01:05 AM #4
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Default Re: Heat sinking for an x-drive?

usually the main IC. If you can't figure out which thing the IC is...well...
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Old 08-23-2014, 02:00 AM #5
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Default Re: Heat sinking for an x-drive?

I usually just thermal epoxy mine down wherever I wanted to mount it. Unless it's epoxied down in a well where there is no access to the side of it, I've had success with running a pocket knife blade between the epoxy and what I mounted it to and carefully popping it loose.
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Old 08-23-2014, 03:40 AM #6
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Default Re: Heat sinking for an x-drive?

Ok, thanks for the suggestions. I think I might just epoxy it to the host itself.
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Old 08-23-2014, 05:04 AM #7
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Default Re: Heat sinking for an x-drive?

Yea you will want it attached to the main heatsink or the host body. The problem with just putting a small block of aluminum or copper yes it may extend out the duty cycle by a small amount usually not much but with nowhere for that heat to go it is retained and it will take forever to cool back down so the off time will be very long.

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Old 08-27-2014, 10:54 PM #8
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Default Re: Heat sinking for an x-drive?

I see most drivers attached to diode directly.
Will long lead wires cause the driver to work harder or heat up more?
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Old 08-27-2014, 10:58 PM #9
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Default Re: Heat sinking for an x-drive?

If your wires are ridiculously long, maybe. But I doubt you are going to use 1,000m of wiring for your laser
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Old 08-28-2014, 12:03 AM #10
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Default Re: Heat sinking for an x-drive?

Quote:
Originally Posted by starlight View Post
I see most drivers attached to diode directly.
Will long lead wires cause the driver to work harder or heat up more?
You will never have wires long enough to make that kind of a difference in your laser. The ones attached directly to the diode don't require heat sinking, however they also aren't required to be attached directly to the driver.

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Old 08-28-2014, 12:32 AM #11
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Default Re: Heat sinking for an x-drive?

Quote:
Originally Posted by Pi R Squared View Post
You will never have wires long enough to make that kind of a difference in your laser. The ones attached directly to the diode don't require heat sinking, however they also aren't required to be attached directly to the driver.

Alan
Thanks. I made a ugly lab style laser and the driver becomes hot to the touch after 20 seconds or so. I guess I need to attach driver to diode directly.
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445nm 501b by Blord 2.5W (peak 2.7W)
447nm Dragon Lasers Spartan 1W (peak 1.3W)
520nm custom Ehgemus host NDG7475 1W (peak 1.5W)
520nm Ehgemus host PL520-B1 120mW (peak 143mW)
532nm labby 500mW (peak 630mW)
532nm Dragon Lasers Viper 75mW (peak 122mW)
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650nm E-Bay 303 host 200mW (peak 141mW) 75% IR
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Old 08-28-2014, 12:36 AM #12
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Default Re: Heat sinking for an x-drive?

Quote:
Originally Posted by starlight View Post
Thanks. I made a ugly lab style laser and the driver becomes hot to the touch after 20 seconds or so. I guess I need to attach driver to diode directly.
Or just heatsink it
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Old 08-28-2014, 12:42 AM #13
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Default Re: Heat sinking for an x-drive?

Quote:
Originally Posted by starlight View Post
Thanks. I made a ugly lab style laser and the driver becomes hot to the touch after 20 seconds or so. I guess I need to attach driver to diode directly.
No I think you misunderstood, the ones that are attached directly to the diode are lower power so they don't need heat sinking. If your driver gets hot too fast then don't attach it directly to the diode, it needs a heat sink or a fan.

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Old 08-28-2014, 12:44 AM #14
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Default Re: Heat sinking for an x-drive?

I had it heatsinked but was worried.

How hot can a driver before failure?

And heatsinking isn't nessasary when attach to diode because the heatsinking is shared with the diode heatsink? I just don't wanna fry my driver and trying to get long run times (5 minutes would be great) out if the project.

Driver is x-drive 2.4a from dtr
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405nm E-bay 303 host (peak 113mW) 13% IR dead
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450nm home made labby NUBM44 6w (peak 7.2w)
445nm Ehgemus RPL host 3W (peak 3.5W)
445nm home made labby 3W (peak 3.1W)
445nm 501b by Blord 2.5W (peak 2.7W)
447nm Dragon Lasers Spartan 1W (peak 1.3W)
520nm custom Ehgemus host NDG7475 1W (peak 1.5W)
520nm Ehgemus host PL520-B1 120mW (peak 143mW)
532nm labby 500mW (peak 630mW)
532nm Dragon Lasers Viper 75mW (peak 122mW)
532nm C6 host (peak 103mW)
532nm E-Bay 303 host 200mW (peak 95mW) 15% IR
589nm Dragon Lasers Spartan 50mW (peak 115mW)
650nm C6 host (peak 153mW)
650nm E-Bay 303 host 200mW (peak 141mW) 75% IR
650nm DVD diode Mini Mag host 54mW (my first build)
650nm dollar store mini pen 5mW X2

808nm Wicked Lasers E2 400mW (peak 598mW)

Expanders & Googles etc:
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Last edited by starlight; 08-28-2014 at 12:46 AM.
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Old 08-28-2014, 12:46 AM #15
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Default Re: Heat sinking for an x-drive?

As crazyspaz said you can epoxy the ic to the host/module
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Old 08-28-2014, 12:58 AM #16
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Default Re: Heat sinking for an x-drive?

Quote:
Originally Posted by starlight View Post
I had it heatsinked but was worried.

How hot can a driver before failure?

And heatsinking isn't nessasary when attach to diode because the heatsinking is shared with the diode heatsink? I just don't wanna fry my driver and trying to get long run times (5 minutes would be great) out if the project.

Driver is x-drive 2.4a from dtr
No the heat sinking isn't shared with the diode, I said less powerful drivers don't need heat sinking. I don't know how hot is too hot for a 2.4A x-drive but if your worried about it just heat sink it, and since you said its a lab laser, maybe you can put a fan in the box.

Quote:
Originally Posted by upaa27 View Post
As crazyspaz said you can epoxy the ic to the host/module
He said it was a lab laser, not a hand held.

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