Heating mantel variac questions

Hash and Stuff Distillation
61

when I have an inductive motor its a coil around a ferret core in a special configuration to make multiple poles of magnetism when energy is added and then some magnets around this.
it gets more complex when it gets to three faze power as you have rotating poles rather than
the static poles you get for single faze.

put some electricity into the coil and you make an electromagnet that interacts with the magnetic
field from the magnets on the outside of the coil.

this then is turned into work.

if there is enough current to build enough magentic field the work will turn into motion friction
and some heat.

if there is not enough current to build enough magnetic field the work will not have any other option
but to go to heat.

this is what you are trying to describe.

pulsewidth modulation is great for motors as each push of higher voltage power adds to the
motion of the motor.
as it is pulsed this reduces heat as well due to less work being not converted to movement.

we want heat its a “heating mantle”

you may at a special temp of some wires “oxidize them” what the temp is I am not looking up
as I don’t want you have half ideas and passing them on.

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62

If you under power any type of wire, heater, motor assembly the wire wants to draw more than is given. It stresses the components.

This info im relaying to you is specifically related to me by my heating components manufacturer of a new mantle device we’ve been working on. If you want to do variable voltage you generally use a much much thicker heater wire or even knurled band? Style and you generate a higher frequency of opperation but lower the amps or voltage via variac style.

I mean in theory anything could be done. Would it be effective? Would it lower over all lifespan? Would it Risk damaging ancillary connected hardware? I mean what you are suggesting isn’t impossible. What I’m saying shouldn’t just be blindly done with China mantles.

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63

ie no math no reference no education just some marketing mumbo jumbo.

sorry is easier you know.

no more insults ye :heart: :heart: :heart:

no more tech review :hugs: :hugs: :hugs:

64

I guess the places I get my new heating components are just lieing to me when I’m designing a controller for it :person_shrugging::person_shrugging::person_shrugging:

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65

glas-col is the go.

been the best for a long long time now.

cheap too.

66

Hold onto your pants. You might just learn a thing or two with shit coming out.

67

very interested in any new tech though I will probably stick to oil baths to be honest.

bee well brother and good night.

68

It would tend to tend to overshoot.

You trained it how to hit the target, then turned up the power. It does the math, and gets it wrong because you lied to it…

It would still try to hold the temp, but would always apply more heat than necessary to increase the temp by the desired amount.

It would get there eventually. Just not as gracefully as it would if it had some way of compensating for your duplicity :shushing_face:

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69

Nope!

Feed a 220V 2000W mantle 110V and it will heat less (500W) which is not at all stressful.

if it also has a motor, that might well get Pissed off. Depending on motor flavor

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70

when it comes to pid’s I can only go on what others have said here and what is documented.

I don’t use them as I use oil baths or a variac.

another great thing about an oil bath is that one size fits all.

still they can be dangerous if you are not used to working with them.

ye I guess I have shown some duplicitiy in this thread :slight_smile:

but I still have only attacked the work and workmanship not the worker so I

have followed my own guidelines.

what would be cool would be a variac that was programmable.

71

I gave up the thread has everything that people need to know now.

V=IR and P=VA is all that is need to understand this stuff.

its funny one could say that turning off the power would burn it out under those conditions

as it is not enough power :yum:

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72

Yeah, but @spdking isn’t one of them high functioning Australians

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73

probably hasn’t had as many drugs as me thats all.

I could fix it but do not wish the responsibility as I feel none would be taken buy the subject them
selves.

I sit with organikum on this.

ban tobacco and alcohol

make lsd mandatory for all politicians

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74

Are you suggesting a PID variac ? :rofl:

75

not for you as your not wanting higher temps than the mantle was designed for.

I am not a fan of the over volt idea but that is the answer to what some may want.

if you want it hot you use a woods bath.

not putting more current into a device than it was designed to take is something I wholeheartedly
agree with even if the wire can take more than it is used at.

woods metal has lead in it and molten lead over time fumes so need a fume hood to work.

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76

It would look cool, a molten bath of metal, most people would think its mercury. I would half expect it to turn into a terminator lol

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77

Wood’s metal is commonly used as a filler when bending thin-walled metal tubes. For this use the tubing is filled with molten Wood’s metal. After this filler solidifies, the tubing is bent. The filler prevents the tube collapsing. The Wood’s metal is then removed by heating, often by immersion in boiling water.

Thank you @squig: I’ve learned something…which means I can leave for the day.

(Hold over from grad school: not allowed to leave until you learn something. Lots of “I’m off now” after 8am lab meetings :joy::rofl::joy:)

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78

me to bro I missed that all together.

nice engineering tip that is :slight_smile:

79

never bring a watch and ask the time.

problem solved im out of here :innocent:

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80

actually threw my watch away at year two when I passed my quals…haven’t owned one in more than 25 years

so you’re on point again.

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