yep what andy says , or you will alighn everything and after an hour or so and the tecs have warmed up the baseplate and mirror mounts,
it will all be wrong again
Senior Member
yep what andy says , or you will alighn everything and after an hour or so and the tecs have warmed up the baseplate and mirror mounts,
it will all be wrong again
When God said “Let there be light” he surely must have meant perfectly coherent light.
Senior Member
Something I learned with time and projects :
Less mirrors you have ( = less mounts you have) lower will be the power losses, and also the misalignment as there is less flexing points.
Exemple ; (sorry guys if it's one of your project... I don't remember where I found the picture).
Here, 8 (!) mirrors should not be there :
Attachment 36910
Jr. Woodchuckington Janitor III, Esq.
hi. that's a very early pic of my projector build.Originally Posted by MIIKKKLLLL
the "extra" mirrors are there quite intentionally. the beams are double bounced before hitting the dichros to ensure the vertical alignment is spot on. the alignment is actually quite stable.
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.
Senior Member
Ok, so the mounts are there for beam height adjustment purpose. Sorry for my last post, I didn't want to criticize your work but just help Taggalucci with some advices ...
BTW, nice abstract show. Good frames optimization, absolutely no flickering. And nice alignment too !
Jr. Woodchuckington Janitor III, Esq.
oh no offense taken
it's absolutely a valid point that each additional mirror reduces total overall power and increases the likely hood for alignment problems.
Ok, so the mounts are there for beam height adjustment purpose. Sorry for my last post, I didn't want to criticize your work but just help Taggalucci with some advices ...
BTW, nice abstract show
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.
Senior Member
if your worried about the amount of mirrors used then muti diode builds are not for you.
Eat Sleep Lase Repeat
Senior Member
Hi Andy,
Yes, I've seen your builds and regularly take inspiration from your site. I'm now finally doing something about that with this build!
I plan to TEC the entire module base plate. I just plan to do it with 16 TECs placed underneath the diode blocks, BUT importantly between the module baseplate and the heat sink. If you look at my latest drawing, you'll see that the diode mounts rest directly on the module base plate. That's why I question stability concerns being raised when there are 16 dispersed TECs rather than 2 bigger ones e.g. Like a building built on 2 big piles rather than an even and spread out set of smaller piles.
If someone can explain scientifically why this would be less stable, please chime in
On the mirror count, I've deliberately reduced mirrors by having all 8 in "series" rather than doing 2 sets of 4 in parallel and then stacking. So I get the whole more mirrors = more alignment issues. I'm not sure where that came from!
I appreciate all your comments and views. I'll be working through the design tonight with my industrial designer friend and will discuss your points with him for his input.
Senior Member
So your saying the tecs are going to be under the main base plate that the diodes and mirror mounts are on ?
And if that is so with 16 tecs better make sure that baseplate and heatsink is dead flat
As i have found in the past just using two big ones gave be problems getting good contact across both
Let alone 16 small ones
Hi Andy,
Yes, I've seen your builds and regularly take inspiration from your site. I'm now finally doing something about that with this build!
I plan to TEC the entire module base plate. I just plan to do it with 16 TECs placed underneath the diode blocks, BUT importantly between the module baseplate and the heat sink. If you look at my latest drawing, you'll see that the diode mounts rest directly on the module base plate. That's why I question stability concerns being raised when there are 16 dispersed TECs rather than 2 bigger ones e.g. Like a building built on 2 big piles rather than an even and spread out set of smaller piles.
If someone can explain scientifically why this would be less stable, please chime in
On the mirror count, I've deliberately reduced mirrors by having all 8 in "series" rather than doing 2 sets of 4 in parallel and then stacking. So I get the whole more mirrors = more alignment issues. I'm not sure where that came from!
I appreciate all your comments and views. I'll be working through the design tonight with my industrial designer friend and will discuss your points with him for his input.
When God said “Let there be light” he surely must have meant perfectly coherent light.
Senior Member
That's exactly my plan right now (subject to further scientific scrutiny)!
Ultimately, this will be about the quality of machining and thermal interfacing. I want to achieve a good result in both.
Senior Member
Ok then let me put it this way
Get yourself some digital calipers
And measure the thickness of all you tecs
And letme know the results
Its going to be a mirical machining job
If you can get good thermal contact across
All 16 tecs
When God said “Let there be light” he surely must have meant perfectly coherent light.
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