Shop Floor Talk  

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

SFT Search:   
Reply
 
Thread Tools Display Modes
  #41  
Old 07-30-2010, 11:01 PM
GWIZ's Avatar
GWIZ GWIZ is offline
SFT Historian
 
Join Date: Feb 2006
Location: USA
Posts: 7,434
Default

Here you go.
Attached Thumbnails
Click image for larger version

Name:	Astro welder 130 Rev 2.jpg
Views:	204
Size:	46.0 KB
ID:	63920  
__________________
*
*
The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment. ~Warren G. Bennis
Reply With Quote
  #42  
Old 08-04-2010, 12:59 AM
Hobweld's Avatar
Hobweld Hobweld is offline
Senior Member
 
Join Date: Jun 2004
Location: Manchester,Ia.
Posts: 561
Default

And finally got some time to put this thing together.

1 Capacitor installed
2. Bleed resistor
3. Relay installed (Thanks again GWIZ)
4. Second bridge rectifier

It has been turned on and none of the magic smoke came out, so that is a plus.

Soon as I get a chance I'll run some welds with it and post them.

Thanks again GWIZ (can't really say that enough) and all who helped with information.

Don't worry I am going to tidy things up and grommet the hole also..

Ken
Attached Thumbnails
Click image for larger version

Name:	SANY0070.jpg
Views:	216
Size:	97.8 KB
ID:	64010   Click image for larger version

Name:	SANY0075.jpg
Views:	212
Size:	96.1 KB
ID:	64011   Click image for larger version

Name:	SANY0072.jpg
Views:	232
Size:	95.1 KB
ID:	64012   Click image for larger version

Name:	SANY0077.jpg
Views:	239
Size:	99.7 KB
ID:	64013  
__________________
There are 10 types of people in the world, those who speak binary and those who don't.
Reply With Quote
  #43  
Old 08-04-2010, 12:52 PM
GWIZ's Avatar
GWIZ GWIZ is offline
SFT Historian
 
Join Date: Feb 2006
Location: USA
Posts: 7,434
Default

Quote:
Originally Posted by Hobweld View Post
3. Relay installed (Thanks again GWIZ)
Don't worry I am going to tidy things up and grommet the hole also..

Ken
Your welcome, but

Rotate the relay (resistor facing out) I don't want the pins to short out to the case., note the other side I kept the wires away from the side so it will have some clearance from the metal case.

I Assumed you would place the relay with the resistor facing away from the metal case of the welder, so I did not mention it.
Also if the relay voltage is to high and drops out you can solder a wire across the resistor without removing it, that's if needed.
__________________
*
*
The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment. ~Warren G. Bennis
Reply With Quote
  #44  
Old 08-04-2010, 02:21 PM
Hobweld's Avatar
Hobweld Hobweld is offline
Senior Member
 
Join Date: Jun 2004
Location: Manchester,Ia.
Posts: 561
Default

Quote:
Originally Posted by GWIZ View Post
Your welcome, but

Rotate the relay (resistor facing out) I don't want the pins to short out to the case., note the other side I kept the wires away from the side so it will have some clearance from the metal case.

I Assumed you would place the relay with the resistor facing away from the metal case of the welder, so I did not mention it.
Also if the relay voltage is to high and drops out you can solder a wire across the resistor without removing it, that's if needed.
GWIZ

Duh, on my part, will do. I should know better.

Ken
__________________
There are 10 types of people in the world, those who speak binary and those who don't.
Reply With Quote
  #45  
Old 08-04-2010, 05:22 PM
DrBob's Avatar
DrBob DrBob is offline
I fear I'll do some damage one fine day
 
Join Date: Jan 2009
Location: New York
Posts: 1,423
Default So?

How did the mods work? Did you get a smoother welding bead?

DrBob
Reply With Quote
  #46  
Old 08-05-2010, 01:10 AM
Hobweld's Avatar
Hobweld Hobweld is offline
Senior Member
 
Join Date: Jun 2004
Location: Manchester,Ia.
Posts: 561
Default

Quote:
Originally Posted by DrBob View Post
How did the mods work? Did you get a smoother welding bead?

DrBob
DrBob

I have not had time yet to run any. I have a early shift tomorrow so perhaps after work I could get it set up and run a few.

Ken
__________________
There are 10 types of people in the world, those who speak binary and those who don't.
Reply With Quote
  #47  
Old 08-08-2010, 01:08 PM
Hobweld's Avatar
Hobweld Hobweld is offline
Senior Member
 
Join Date: Jun 2004
Location: Manchester,Ia.
Posts: 561
Default

Well I finally got some time on the welder since the modifications. And I must say it is night and day. Weld penetration is much better and feed was smoooooth.

I will post some pics when I can get back at it... and I'm not so jittery.... oh brother, today was a bad day for that.

Also had a catastrophic failure of the bleed resistor. That is unless they are supposed to go bang and end up in two pieces. Possible I might have gotten a bad one? It sure did weld much better after it blew...

I tried a few more little beads and it seems to run well.

Now to order a new resistor and a 120v fan to replace the one that came with it. Something in the 100cfm or above range.

I don't like having a charged capacitor in there... I mean I know enough not to touch it but it's the someone else factor. All in all I have to say it was worth the effort.

Ken
__________________
There are 10 types of people in the world, those who speak binary and those who don't.
Reply With Quote
  #48  
Old 08-09-2010, 02:42 PM
GWIZ's Avatar
GWIZ GWIZ is offline
SFT Historian
 
Join Date: Feb 2006
Location: USA
Posts: 7,434
Default

Quote:
Originally Posted by Hobweld View Post
Also had a catastrophic failure of the bleed resistor. That is unless they are supposed to go bang and end up in two pieces. Possible I might have gotten a bad one? It sure did weld much better after it blew...

When it comes to resistors I would guess the resistor was miss marked more then the likely hood it was defective.
probably off by two decimals places.
I have had drill bits and taps that were marked wrong.
__________________
*
*
The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment. ~Warren G. Bennis
Reply With Quote
  #49  
Old 08-09-2010, 03:34 PM
DrBob's Avatar
DrBob DrBob is offline
I fear I'll do some damage one fine day
 
Join Date: Jan 2009
Location: New York
Posts: 1,423
Default Bleeder Resistor

Hob, the purpose of the bleeder resistor is as you probably already know to provide a safe slow bleed off of the charge on the capacitor when the circuit is powered down. This is for safety as if you should accidentally drop a piece of metal (such as the gold ring on your finger) across the charged contacts of the cap, it might just blow your finger off!

The good news is that it needn't be a big, high wattage resistor, just so it is of sufficiently high value that the current going through it is low. A 2W 10K Ohm resistor would work fine. You could get that at your local Radio Shack.

Certainly the resistor blew because too much current was passing through it and it got too hot. Probably as GWIZ said it was defective or mismarked.

I'm glad you got the welder working better!

DrBob
Reply With Quote
  #50  
Old 08-26-2010, 07:50 AM
Hobweld's Avatar
Hobweld Hobweld is offline
Senior Member
 
Join Date: Jun 2004
Location: Manchester,Ia.
Posts: 561
Default

Well all, I have added a 10kohm 5 watt resistor and a 110cfm muffing fan to the unit.
This has really worked out well. The fan blows a awesome amount of air compared to little so called fan that was factory installed.
The resistor remained in one piece this time and drained the capacitor in a reasonable amount of time. Welding pics to come this weekend.

Ken
__________________
There are 10 types of people in the world, those who speak binary and those who don't.

Last edited by Hobweld; 08-26-2010 at 12:06 PM.
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 12:09 AM.


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