Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Fabrication

SFT Search:   
Reply
 
Thread Tools Display Modes
  #71  
Old 09-15-2013, 07:18 PM
Tally ZJ's Avatar
Tally ZJ Tally ZJ is offline
Elite Member
 
Join Date: Jul 2011
Location: Havana, Florida
Posts: 1,089
Default

I have been regulating the air. I bump the switch on an off to keep the fan speed lower. I do need some kind of regulator valve though.

I do not run the fan all the time. Just when I need to heat. However, you are telling me that I can get a hot enough heat without air to heat small diameter steel?

What do I do there, just leave the steel in the heat longer?
__________________
http://www.welding-tv.com
Reply With Quote
  #72  
Old 09-15-2013, 07:49 PM
mudbug's Avatar
mudbug mudbug is offline
Cranky Crustacean
 
Join Date: Sep 2008
Location: Athens,Louisiana
Posts: 4,443
Default

You might build a speed control using a rotary switch for a ceiling fan or buy one from Harbor Freight.
Reply With Quote
  #73  
Old 09-15-2013, 09:30 PM
Tally ZJ's Avatar
Tally ZJ Tally ZJ is offline
Elite Member
 
Join Date: Jul 2011
Location: Havana, Florida
Posts: 1,089
Default

Quote:
Originally Posted by mudbug View Post
You might build a speed control using a rotary switch for a ceiling fan or buy one from Harbor Freight.
I thought about that. Those aren't damaging to the motor are they? I mean, are there special motors that allow for variable speed like that and others that are not?
__________________
http://www.welding-tv.com
Reply With Quote
  #74  
Old 09-15-2013, 10:32 PM
mudbug's Avatar
mudbug mudbug is offline
Cranky Crustacean
 
Join Date: Sep 2008
Location: Athens,Louisiana
Posts: 4,443
Default

That's a good question ? The speed controls from Harbor freight are for routers & such and the dimmer type controls for ceiling fans must act in a similar manner...

I never considered they might damage a simple blower type motor ,but maybe so.

Should be someone here that knows more than we do about these type controls...
Reply With Quote
  #75  
Old 09-16-2013, 03:21 AM
LarryH LarryH is offline
Member
 
Join Date: Jul 2012
Location: campbell hall new york
Posts: 100
Default

you should use an air gate to control the air, to use a rheostat, the motor has to be a variable speed motor. Grind a slot in the feed pipe and match it with a piece of sheet or flat stock, put a lever on it and away you go
Reply With Quote
  #76  
Old 09-16-2013, 07:54 AM
Tally ZJ's Avatar
Tally ZJ Tally ZJ is offline
Elite Member
 
Join Date: Jul 2011
Location: Havana, Florida
Posts: 1,089
Default

Quote:
Originally Posted by LarryH View Post
you should use an air gate to control the air, to use a rheostat, the motor has to be a variable speed motor. Grind a slot in the feed pipe and match it with a piece of sheet or flat stock, put a lever on it and away you go
That was more my idea. I think I will slot the feed pipe and put a sliding collar on it and try that first.
__________________
http://www.welding-tv.com
Reply With Quote
  #77  
Old 09-16-2013, 07:55 AM
USMCPOP's Avatar
USMCPOP USMCPOP is offline
Gold Star Dad
 
Join Date: Jul 2006
Location: Richmond, VA area
Posts: 12,367
Default

Tally, you need some air, just not a tremendous amount for a small fire.

Those router speed controls are for universal motors as found on fixed-speed routers, angle grinders and vacuum cleaners.

Check out the double bellows about halfway down this page: http://www.darkcompany.ca/blog/labels/blacksmithing.php Maybe I'll make one like that one of these days. The twin design allows you to get a steadier flow of air.

The horse poop and clay forge is interesting. If you want to make one ...
Attached Thumbnails
Click image for larger version

Name:	HorsePoop.jpg
Views:	167
Size:	89.6 KB
ID:	109584  
__________________
USMCPOP
Reply With Quote
  #78  
Old 09-16-2013, 11:16 AM
Norm W's Avatar
Norm W Norm W is offline
Elite Member
 
Join Date: May 2006
Location: Syracuse, NY
Posts: 3,023
Default

A "waste gate" might be easier on you and the blower motor. The blower keeps a constant speed, the excess air goes out the waste gate. If you have ever blocked the air out or in on a vacuum cleaner you'll notice that the motor speeds up. The air that cools the motor is diminished and over heating is a possibility. By closing down the air to the forge and sending it out the "waste gate" the volume of air stays constant through the blower.
__________________
Make over, make do, or do without

Why do I have to press one for English when you're just gonna transfer me to someone I can't understand anyway?

Grant me the strength to accept the things I cannot change, the courage to change the things I can & the friends to post my bail when I finally snap!
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 12:39 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.