T
Tom Del Rosso
- Jan 1, 1970
- 0
Some microwaves have turntables that turn in alternate directions each time
they start. Why the heck is that?
they start. Why the heck is that?
Some microwaves have turntables that turn in alternate directions each time
they start. Why the heck is that?
Claude Hopper said:It's so your food will cook more evenly. Many directions are to
microwave for a few minutes, open and stir contents, then continue a few
more minutes. It's more through to run the food past the microwaves in
both directions.
It's so your food will cook more evenly. Many directions are to
microwave for a few minutes, open and stir contents, then continue a few
more minutes. It's more through to run the food past the microwaves in
both directions.
Based on what all of my microwave ovens have done, including the one
currently in use at home, and the two we use in my wife's cafe, the
direction of rotation appears to be completely random, and I would suspect,
a function of the motor type, as Franc suggests. I would also be surprised,
given the way that the microwaves bounce around the oven cavity almost
infinitely, that the direction of rotation of the turntable would have the
slightest effect on the eveness of the microwave penetration, and cooking
efficacy.
Arfa
No, it's not. It shouldn't make any difference, as the food is subjected to
the same "pattern" regardless of which way the table turns.
My guess is that it's to even out the wear.
No, it's not. It shouldn't make any difference, as the food is
subjected to the same "pattern" regardless of which way the table
turns.
My guess is that it's to even out the wear.
William Sommerwerck said:It a function of the type of motor used, it is much smaller to make a
motor that will turn in either direction than one that always turns in
the same direction. If you look at some extremely small motors,
some have a ratchet and tiny gear that only allow them to turn in one
direction, but the ratchet and gear take up space and cost extra $$
and so Uwaves don't bother to use them.
Microwaves do not 'bounce around' in the oven. Microwaves are
directional, that's why you move the food. The microwave emitter does
not move.
Studies on choice of optimized regimes of RF plasma production/heating
in Uragan-3M were performed by
using microwave reflectometry. Radial profiles of electron density and
it fluctuation and poloidal rotation velocity
have been measured for different RF antenna configurations and confining
magnetic field direction. It was shown
that plasma parameters are changing at magnetic field reversal. Best
regime is that one when magnetic field
direction is “normal” (that one at which magnetic configuration was
“tuned” at magnetic surfaces studies). This
regime is characterized by higher value of electron density and by
higher value of poloidal rotation velocity shear.
Claude Hopper said:Microwaves do not 'bounce around' in the oven. Microwaves are
directional, that's why you move the food. The microwave emitter does
not move.
regime is characterized by higher value of electron density and by
higher value of poloidal rotation velocity shear.
On some cookers, that isn't strictly true.
Dear oh dear ...
Read paragraph 3 of
http://www.doctorndtv.com/FAQ/detailfaq.asp?id=7837
and 2) of paragraph 1 at
http://www.gallawa.com/microtech/howcook.html
and the third paragraph of
http://www.techitoutuk.com/knowledge/food/microovens.html
and the fourth paragraph of
http://www.howstuffworks.com/framed.htm?parent=microwave.htm&url=http....
Many people apparently disagree with your understanding of how microwaves
behave inside the oven cavity ...
Arfa- Hide quoted text -
- Show quoted text -
William Sommerwerck said:To quote Galileo: "Nevertheless, it does move." Once upon a time,
microwave
ovens had a "stirrer", a fan that "moved" the standing-wave pattern around
the oven cavity.
Ron Johnson said:Remember those old Philips machines? where the magnetron was at the bottom
and fired the magic rays into an aluminium 'fan' which was mounted beneath
the glass floor of the oven. the reflector was propelled by the draught
from the magnetron cooling fan whereupon the microwaves were reflected
upwards through the glass floor of the cavity and onwards and upwards into
the food.
Ron
Put a cd in the mag, and the burn marks on the surface show theRon said:There`s a demonstration which I`ve seen, where a shallow plate of
something which looks like porridge is placed in a m/w and when the oven
is operated, you can see the wave pattern on the surface. I`ve also seen
it done with hundreds of neon lamps laid on the plater
The demonstration indicates nicely the hot spots and nulls in the
microwave coverage.
Ron
Tssk!! wimp...Ron said:Yeah, and doesn't it stink!
Claude said:Oh, how long do they bounce around tell me. If that were true with the
klystron continuing to transmit more waves and the old ones keep
bouncing around they would build up and explode the oven. That's does
not happen does it.
Oh, how long do they bounce around tell me. If that were true with
the klystron [sic] continuing to transmit more waves and the old ones
keep bouncing around they would build up and explode the oven. That's
[sic] does not happen does it.
Claude Hopper said:Oh, how long do they bounce around tell me. If that were true with the
klystron continuing to transmit more waves and the old ones keep
bouncing around they would build up and explode the oven. That's does
not happen does it.
consumer microwave ovens, you would probably be best to make
no further comments in the thread, as you are not currently giving
yourself a lot of credibility.
No, it's not. It shouldn't make any difference, as the food is subjected to
the same "pattern" regardless of which way the table turns.
My guess is that it's to even out the wear.