Home | Community | Message Board

Out-Grow.com - Mushroom Growing Kits & Supplies
This site includes paid links. Please support our sponsors.


Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Shop: OlympusMyco.com We’re Not Chasing Unicorns—We’re Building Quality (Olympus Myco Grow Bags)   North Spore Cultivation Supplies   PhytoExtractum Buy Bali Kratom Powder

Jump to first unread post Pages: < Back | 1 | 2 | 3  [ show all ]
Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
OfflineRogerRabbitM
Bans for Pleasure
Male User Gallery

Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 1 year, 10 months
Trusted Cultivator
OG Cultivator
Re: Need help building a flowhood. [Re: Sci-Fi]
    #12458647 - 04/26/10 09:24 AM (14 years, 8 months ago)

Don't be so sure about that.  I wouldn't use it on a flowhood blower.  Also, speed controllers don't function as rheostats.  A rheostat is a variable resister which heats up as the voltage is dropped across it.  You don't want the voltage dropping on a blower motor.

That unit may or may not work depending on how the motor windings are laid out.  Some motors can't be controlled by other than frequency variation.  The speed is determined by the 60 hz current.  That's why the same motor running in Europe on 50 hz will run slower.

With all the made in china crap on the market these days, you never know what's going to work or not and they don't give enough info on that link to make a positive determination.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

Extras: Filter Print Post Top
InvisibleSci-Fi
OG
Male User Gallery

Registered: 02/28/10
Posts: 1,232
Re: Need help building a flowhood. *DELETED* [Re: RogerRabbit]
    #12461190 - 04/26/10 05:35 PM (14 years, 8 months ago)

Post deleted by Sci-Fi

Reason for deletion: fuck


Extras: Filter Print Post Top
OfflineRogerRabbitM
Bans for Pleasure
Male User Gallery

Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 1 year, 10 months
Trusted Cultivator
OG Cultivator
Re: Need help building a flowhood. [Re: Sci-Fi]
    #12498334 - 05/03/10 10:54 AM (14 years, 8 months ago)

Quote:

Sci-Fi said:
There are very few fans that don't work with a rheostat.




Wrong.

The speed of an AC motor is determined by the frequency in cycles per second(HZ), not the current or voltage.  If you reduce voltage on an AC motor and leave the frequency of the supply constant, you'll burn out the motor.  Don't confuse an AC motor with a DC motor.  In addition, the NEC requires devices to be listed for the application.  Dimmers and/or rheostats are not listed for AC motor speed control.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

Extras: Filter Print Post Top
InvisibleSci-Fi
OG
Male User Gallery

Registered: 02/28/10
Posts: 1,232
Re: Need help building a flowhood. *DELETED* [Re: RogerRabbit]
    #12500155 - 05/03/10 04:42 PM (14 years, 8 months ago)

Post deleted by Sci-Fi

Reason for deletion: fuck


Edited by Sci-Fi (05/03/10 05:00 PM)

Extras: Filter Print Post Top
OfflineRogerRabbitM
Bans for Pleasure
Male User Gallery

Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 1 year, 10 months
Trusted Cultivator
OG Cultivator
Re: Need help building a flowhood. [Re: Sci-Fi]
    #12500354 - 05/03/10 05:19 PM (14 years, 8 months ago)

Those are not for use on a blower motor.  In addition, it would be a violation of the National Electrical Code article 430 to do so.  There's a huge difference in the design and windings between a ceiling fan which runs at 50 to 150 RPM, and a blower which runs at 1750 RPM.  This isn't a point to argue.  The individual is free to do whatever he wishes, but no licensed electrician would ever connect a ceiling fan dimmer/controller to a squirrel cage blower motor.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

Extras: Filter Print Post Top
InvisibleSci-Fi
OG
Male User Gallery

Registered: 02/28/10
Posts: 1,232
Re: Need help building a flowhood. *DELETED* [Re: RogerRabbit]
    #12500584 - 05/03/10 05:58 PM (14 years, 8 months ago)

Post deleted by Sci-Fi

Reason for deletion: fuck


Extras: Filter Print Post Top
OfflineRogerRabbitM
Bans for Pleasure
Male User Gallery

Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 1 year, 10 months
Trusted Cultivator
OG Cultivator
Re: Need help building a flowhood. [Re: Sci-Fi]
    #12500801 - 05/03/10 06:35 PM (14 years, 8 months ago)

I won't continue to argue the point with you.  Finish your apprenticeship, get your electrical license, and if you still wish to argue, go for it.

As said already, the best way to reduce air flow is to reduce part of the intake.  This cuts down on the current drawn by the motor, and it's not being dissipated across a resistor as heat/wasted energy.  This is standard operating procedure in HVAC applications.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

Extras: Filter Print Post Top
InvisibleSci-Fi
OG
Male User Gallery

Registered: 02/28/10
Posts: 1,232
Re: Need help building a flowhood. [Re: RogerRabbit]
    #12500963 - 05/03/10 07:00 PM (14 years, 8 months ago)

Maybe in some Jurassic era installation before modern VFD controllers. Duct static  is maintained by a VFD controlled air handler motor.

Edited by Sci-Fi (05/11/10 10:29 PM)

Extras: Filter Print Post Top
InvisibleSci-Fi
OG
Male User Gallery

Registered: 02/28/10
Posts: 1,232
Re: Need help building a flowhood. *DELETED* [Re: RogerRabbit]
    #12501131 - 05/03/10 07:27 PM (14 years, 8 months ago)

Reason for deletion: Busy removing foot from mouth

Edited by Sci-Fi (05/17/10 03:47 PM)

Extras: Filter Print Post Top
OfflineRogerRabbitM
Bans for Pleasure
Male User Gallery

Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 1 year, 10 months
Trusted Cultivator
OG Cultivator
Re: Need help building a flowhood. [Re: Sci-Fi]
    #12501736 - 05/03/10 09:25 PM (14 years, 8 months ago)

Quote:

I'm starting to doubt you as a cultivator RR




And I'm starting to feel really sorry for your journeyman.  :nono:

I had an apprentice like you once.  His previous two journeymen had sent him back to the union hall for arguing all the time rather than trying to learn.  I was the oldest journeyman on the job so told the steward I'd take the kid, because after raising four of my own, I had the patience of a saint.  Two weeks was all I could take before washing my hands of him, and he was kicked out of the program.  You only get two chances and the third journeyman to fire you is your last straw.

Electrical equipment must be listed for the use.  A ceiling fan dimmer is not listed as a motor speed controller.  They don't give the horsepower rating, which is required for motor speed controllers.  A ceiling fan dimmer is also not a VFD.  As for your Jurassic Park analogy, varicones are still used to this day in brand new data centers to maintain positive pressure in buildings with hundreds of thousands of square feet.  When the varicone closes, the amperage of the BLOWER motor is reduced.  Squirrel cage blowers are not fans.  You need to learn the distinction before you embarrass yourself further. 

Just because you say it will work on 90% of the motors out there does not mean it will.  However, to humor you perhaps he doesn't want to find out if his is one of the ten percent of the motors that will burn up. 

You should also be aware of an 'electrician' in NY a few years ago who hooked up a dimmer switch to a 'non rated' ceiling fan.  He tested it and it worked, so he left the house.  A few hours later, the fan overheated and shorted out, catching the house on fire and killed two children.  He was charged with 2nd degree murder, later reduced to manslaughter and sentenced to ten years in prison.  He also has to live with the fact that he killed two kids.  Electricity is not to be fooled with and it's the reason we have codes.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

Extras: Filter Print Post Top
Offlinexxxfrekboyx
Booyah!
 User Gallery


Registered: 04/07/10
Posts: 119
Loc: never never land
Last seen: 1 year, 2 months
Re: Need help building a flowhood. [Re: RogerRabbit]
    #12501781 - 05/03/10 09:34 PM (14 years, 8 months ago)

SHAM-POW! :spank:

Extras: Filter Print Post Top
InvisibleSeagoat
~
 User Gallery

Registered: 04/07/10
Posts: 306
Re: Need help building a flowhood. [Re: Sci-Fi]
    #12502254 - 05/03/10 10:50 PM (14 years, 8 months ago)

Quote:

Sci-Fi said:

Amp Readings from a fan I just tested




A fan? This discussion is not about fans. Fans are very different creatures than blowers. I have done this test properly with a clamp on amp meter and a blower and have seen the amperage drop in real time. I know someone very well who has worked in heating and cooling for 15 years who has verified this...as well as my other friend who is a mechanical engineer and one of the smartest people I know.

"I'm starting to doubt you as a cultivator RR."<====?????seriously man.
Please don't disrespect someone unless you know what you are talking about and who you are talking to...

Extras: Filter Print Post Top
OfflineTheBandit
Infidel
Male

Registered: 03/03/08
Posts: 1,655
Last seen: 14 years, 3 months
Re: Need help building a flowhood. [Re: Seagoat]
    #12502278 - 05/03/10 10:55 PM (14 years, 8 months ago)

i wish i hadn't posted in this thread so it wouldn't keep popping up on my list.


--------------------




[quote]RogerRabbit said:
Ah, that explains it.  Typical know-it-all noob.  We get a few thousand just like you register here every year.  They try a few grows, fail miserably and then after a few months or one bad trip, go back to sniffing glue, never to be seen again.

We have a basic pf tek that's idiot proof enough for noobs to get fucked up with their friends. 

Mycologists on the other hand grow for the love of growing.  They want to experiment with various species, substrates, and fruiting environments. They'll move on to isolate strains, attempt hybridization, and in general treat cultivation as an artform, rather than a chore that must be performed as a means to an end.  They'll work twice as hard for a ten percent gain, just for the love of perfection.  These are the ones who will isolate strains, not the dumb fucks who treat mushrooms as a drug, or even worse, a pathogen, as if mushrooms cause disease.
RR [/quote]

Extras: Filter Print Post Top
InvisibleElSeta
Female User Gallery

Registered: 06/26/09
Posts: 127
Loc: Atlantida.
Re: Need help building a flowhood. [Re: TheBandit]
    #12546039 - 05/11/10 10:11 PM (14 years, 8 months ago)

Here are my 2 cents BEEP. This may illuminate your thoughts.
SPEED CONTROL


--------------------
-  -  -  -  -  -  -  -  -  -  -  -  -
Looking for Lion's Mane and Yellow Oyster culture. Will trade for: Shiitake/King Oyster/Blue Oyster/White Beech.
Me for info.



Yes, you can see the real reality through a little window. Now, build a door.

Extras: Filter Print Post Top
InvisibleBEEP
Registered: 01/06/08
Posts: 1,385
Re: Need help building a flowhood. [Re: ElSeta]
    #12546176 - 05/11/10 10:42 PM (14 years, 8 months ago)

That's a good link, thanks! :lol: operation is misspelled though. But really that helps, I was going to get the triac thing when I get to it, right now the intake is covered, only 8²" is open.

IDK what FP is trying to pull, they obviously don't match. I think someone already said this but I'm pretty sure the small blower they have is even to big for the 18x24.

Extras: Filter Print Post Top
Invisibleteknix
𓂀⟁𓅢𓍝𓅃𓊰𓉡 𓁼𓆗⨻
 User Gallery

Registered: 09/16/08
Posts: 11,953
Re: Need help building a flowhood. *DELETED* [Re: Sci-Fi]
    #12546232 - 05/11/10 10:54 PM (14 years, 8 months ago)

Here is the definition of drag. Which is exactly what your creating by covering the fan.

In fluid dynamics, drag (sometimes called air resistance or fluid resistance) refers to forces that oppose the relative motion of an object through a fluid (a liquid or gas). Drag forces act in a direction opposite to the oncoming flow velocity.[1] Unlike other resistive forces such as dry friction, which is nearly independent of velocity, drag forces depend on velocity.[2]

For a solid object moving through a fluid, the drag is the component of the net aerodynamic or hydrodynamic force acting opposite to the direction of the movement. The component perpendicular to this direction is considered lift. Therefore drag opposes the motion of the object, and in a powered vehicle it is overcome by thrust.

In astrodynamics, and depending on the situation, atmospheric drag can be regarded as an inefficiency requiring expense of additional energy during launch of the space object or as a bonus simplifying return from orbit.

Extras: Filter Print Post Top
InvisibleSci-Fi
OG
Male User Gallery

Registered: 02/28/10
Posts: 1,232
Re: Need help building a flowhood. *DELETED* [Re: teknix]
    #12546455 - 05/11/10 11:43 PM (14 years, 8 months ago)

I agree and still I have no idea why you replied with this.

Extras: Filter Print Post Top
InvisibleElSeta
Female User Gallery

Registered: 06/26/09
Posts: 127
Loc: Atlantida.
Re: Need help building a flowhood. *DELETED* [Re: Sci-Fi]
    #12578952 - 05/17/10 01:23 PM (14 years, 8 months ago)

Beep, can you update your thread with pics?


--------------------
-  -  -  -  -  -  -  -  -  -  -  -  -
Looking for Lion's Mane and Yellow Oyster culture. Will trade for: Shiitake/King Oyster/Blue Oyster/White Beech.
Me for info.



Yes, you can see the real reality through a little window. Now, build a door.

Extras: Filter Print Post Top
Jump to top Pages: < Back | 1 | 2 | 3  [ show all ]

Shop: OlympusMyco.com We’re Not Chasing Unicorns—We’re Building Quality (Olympus Myco Grow Bags)   North Spore Cultivation Supplies   PhytoExtractum Buy Bali Kratom Powder


Similar ThreadsPosterViewsRepliesLast post
* What the hell is a flowhoods use? myco_holic 2,611 12 10/08/02 09:07 PM
by SixTango
* Speed Controller for Flowhood CraiggyJ 894 6 03/03/18 01:21 PM
by CraiggyJ
* Best flowhood design MycoCakeEater 1,399 10 07/11/03 04:25 AM
by MycoCakeEater
* Building a glovebox, need a hepa filter Rohypnol 2,617 14 08/28/03 11:12 AM
by screaminsemen
* -==Stove flowhood modification!?==-- arcadium 1,379 7 11/30/02 01:24 PM
by resin
* Anno has left the building
( 1 2 3 4 5 6 all )
RoadkillM 8,620 119 06/14/03 10:34 AM
by HagbardCeline
* controlling incubation temperature *DELETED* pB0t 1,468 7 05/03/03 08:52 AM
by yeti
* flowhood/hepa filter????? skyler 1,208 3 03/08/02 01:39 AM
by 40oz

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: Shroomism, george castanza, RogerRabbit, veggie, mushboy, fahtster, LogicaL Chaos, 13shrooms, hamloaf, cronicr, Stipe-n Cap, Pastywhyte, bodhisatta, Tormato, Land Trout, A.k.a
3,523 topic views. 20 members, 78 guests and 20 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2025 Mind Media. Some rights reserved.

Generated in 0.019 seconds spending 0.005 seconds on 13 queries.