TEC Chiller Project

[uranium]

Thanks

With respect, M4 is 4mm major diameter which is 4/25.4 in inches= 0.157, which would make my calculation correct European versus US Screw sizes!!

Geoff

Looks good...you've done your research.
It's a moot point, so long as you don't crack your pelts but 15lbs per screw is well over 250psi.

T = (C x D x F x in²) / (# of screws)

T lbs per screw
C is torque coef. 0.2 = stainless steel
D nom. size M4 = 0.112
F force we will use 300psi
in² 2x 62mm x 62mm = 11.52

(0.2 x 0.112 x 300 x 11.52) / 6 = 12.9 lbs per screw for 300psi

Torque wrenches are often way over ...more often than not starting at 20inch lbs you needed a torque screwdriver - much smaller torques.

Pleased to see you got yourself a nice variable PSU those meanwell things are not as useful as they could be.

[uranium]

..... and here's the PWM Booster




Its basically the one described by Ultrasonic 2 in this thread:

http://www.overclock.net/peltiers-te...troller-2.html

I stuck a 40mm Kaze Fan on the heatsink, with a temperature probe hooked up to the T-balancer (might as well do something with all the sensor channels on it).

[zipdogso]

Thanks

With respect, M4 is 4mm major diameter which is 4/25.4 in inches= 0.157, which would make my calculation correct European versus US Screw sizes!!

Geoff

Your probably right But I was under the impression it is not the outside dia of the threads you use but the point of most grip which is the size less the thread which is 3.3mm 0.1 roughly I could well be wrong but I just go by size conversions I have found here and there, Going by the correct definition of "nominal" you right and I an wrong !!


Like I said it's a moot point just tension well so long as you don't crack them.

Incidently have you considered using a thin layer 2 or 3mm max of neoprene between the layers the more you can insulate the hot from the cold the better.

Be interesting to see what Ultrasonic will make of your milled blocks...surprised he hasn't been here yet...

[uranium]

Incidently have you considered using a thin layer 2 or 3mm max of neoprene between the layers the more you can insulate the hot from the cold the better.

Yes I did that already and insulated the entire unit, also insulated the cold lines with 5mm thick neoprene self adhesive tape then wrapped with PVC tape. Here it is all installed in the case:



Even though this is a Lian Li G70 which is pretty huge, not a lot of room left

Results soon.....