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screen printing => Equipment => DIY - From master engineered marvels to cobbled together jury-rigged or Jerry-built junk! => Topic started by: Stinkhorn Press on June 22, 2017, 10:56:41 AM

Title: attach fan/vac to MH light box?
Post by: Stinkhorn Press on June 22, 2017, 10:56:41 AM
Pretty standard old setup. intake vents on the short ends, exit vents (facing up?) on the long sides.

Unit gets pretty hot, makes the glass and rubber and screen too hot. What are my best options for getting it cooler and not damaging the bulb?
Title: Re: attach fan/vac to MH light box?
Post by: Sbrem on June 22, 2017, 02:26:27 PM
the heat rising, as it must of course, is the problem, I'm not sure there is an easy answer, but is there any way at all you could flip the table and dismantle and  mount the light above it? The light does not really need to have the shroud around it, none of mine ever have, going way back...

Steve
Title: Re: attach fan/vac to MH light box?
Post by: Prince Art on June 22, 2017, 03:02:00 PM
... retrofit LEDs...  ;D

(Sorry. No real help here.)
Title: Re: attach fan/vac to MH light box?
Post by: Frog on June 22, 2017, 03:15:56 PM
Yep, it's that shroud that's keeping the heat in (assuming that it doesn't also act as a reflector).
Adding a fan could make it like a vacuum cleaner chamber if you're not careful.
Old school custom car dudes would have it louvered.
Heck, they even louver trunks!
(http://rrcfabricationandspeed.com/wp-content/uploads/2015/10/IMG_0116.jpg)
Title: Re: attach fan/vac to MH light box?
Post by: tonypep on June 22, 2017, 03:19:36 PM
Gotta keep that spare tire cool ;)
Title: Re: attach fan/vac to MH light box?
Post by: Stinkhorn Press on June 22, 2017, 03:41:33 PM
the shroud is painted black inside, it's just a "don't burn your eyes" trap.
we could take it out an put a skirt around the edges in it's stead, that would be a little bit of help.

"contained" units (not open frame like this) will have the same issue, is it just a matter of putting the right fans in the right places?
Title: Re: attach fan/vac to MH light box?
Post by: Zelko-4-EVA on June 22, 2017, 09:29:40 PM
what brand is the unit? could you contact manufacturer?

Title: Re: attach fan/vac to MH light box?
Post by: Prince Art on June 22, 2017, 11:43:38 PM
Could you add a small intake fan to one side, and outtake fan to the other, to keep air flowing, and heat always moving out?
Title: Re: attach fan/vac to MH light box?
Post by: markdhl on June 23, 2017, 02:53:27 PM
You do not want the heat deflectors on this design.  Remove those.

Also, you can add an HF1 Exhaust fan to get the heat away also.  Are you sure the internal fans are working on each end.

As always, please do not hesitate to call me direct anytime.  Always great talking to you
Title: Re: attach fan/vac to MH light box?
Post by: Stinkhorn Press on June 30, 2017, 05:33:42 PM
solution for now is - avoiding the cost, hassle, and potential downsides of a fan - deleted the shroud and taped a 30" strip of white vinyl around the edge of the glass to make a breathable skirt. my light box is going commando.

thanks go out especially to doug at douthitt!
Title: Re: attach fan/vac to MH light box?
Post by: Get Shirts on July 07, 2017, 07:17:31 PM
Nj.  Nonu


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