What does the thermostat do? It shut down the power when it got too hot? How can it make things cool?
to be honest i have NEVER heard of anyone doing what you've done...
Just re-reading your first post, just make sure you did not bypass the thermostat when you wired the resistors. Also, I don't know the wiring in your unit, but mine has two separate power feeds. A 120V feed only for the heater resistors and a 400V power feed only for the lamp. You would not want to interchange those two.
Seems like you should now be able to set it for an outer housing temp around 38 to 40C.
If you need a new thermostat, the thermostat from a SEAL press will probably work ($130 from B&H). Also you could check out "Rice Cooker Thermostat" like this for $1.50 from Amazon.
1st thing I would do is get a blow dryer and heat the thermostat and watch it open and close. Something is allowing juice to get to the heaters.
The OP has an assembly I assume tyically used in a coffee-machine (though not for boiling but for keeping hot), whereas ic-racer got in relation small resistors. I find that strange.
But who knows, maybe that assembly was actually cheaper...
I was completely fooled...Actually, they're the same pieces. His resistors and thermal switch look identical to mine...he just has four times as many resistors because he has that dope-as-f*** 12" housing.
I was completely fooled...
What to me looked lile a heating-element for a coffee-machine is in fact the lamp-assembly...
Well, over here old cold-light heads are a rarity and that Aristo head totally unknown.
You got it. I've repaired big old lab hotplates, same basic set up. I have a couple Zone VI VC heads, I use the now no longer around, Metrolux II control, similar to RH design Vario. Dream machine . Good work!I did almost that exact thing, but since I don't own a blow dryer I just plugged in the heater circuit and watched to see the movement...and let me tell you: it's microscopic. We're talking half-thousandths, here...but yeah, that assembly is definitely a thermal switch. Also, $150 for one is INSANE.
Actually, they're the same pieces. His resistors and thermal switch look identical to mine...he just has four times as many resistors because he has that dope-as-f*** 12" housing.
Also, here's an update: it's working perfectly now.
Pictured: I even switched the setting to metric degrees, or whatever they're called.
View attachment 212476
That's after ten minutes of preheating. I plugged in the heater circuit with the head at room temperature and then closed the contacts with the adjustment screw, saw the miniature contact arc, and started measuring temperatures and continuing to adjust the screw until I hit 40-ish metric degrees on the housing. Between that and reworking the mounting of the photodiode so that it's only about 1/16" - 1mm? - away from the tube, I'm now seeing stable light output all the way up to the second mark past "L" on my stabilizer! Also, no burning paint smell anymore...
Evidently they're unknown here as well, because even the people that made it don't know that it has a thermal switch / thermostat inside it!
dude
aristogrid went oOb when rick retired IDK 10-15 years ago ...
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