Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 16 to 20 of 20
-
26th Feb 2020, 03:08 PM #16Novice
- Join Date
- Dec 2016
- Location
- Newcastle
- Posts
- 13
Thanks Karl
It is the output in both AC and DC that are just sparking and no go. I will take the side covers and look at all the connection But I feel that this might be something more serious. I will let you know .
-
27th Feb 2020, 11:22 AM #17Novice
- Join Date
- Dec 2016
- Location
- Newcastle
- Posts
- 13
Hi Karl
Opened the machine and blew away inches of dust. All connection appear to be ok. Took out the four diodes and these tested averiging .3750 V. So obviously the fault is not the diodes. What else can I test/do before I chuck it out for scrap? Thank you for your assistence, I appreciate any help.
Tony Cav
-
28th Feb 2020, 11:17 PM #18Most Valued Member
- Join Date
- Sep 2010
- Location
- Lebrina
- Posts
- 1,910
Have you checked that the machine is configured for the supply voltage you are using? If the machine is set for 415V or 480V supply and you are feeding it 240V that will halve your open circuit voltage (should be 70VAC output from transformer). The correct shunt positions are shown in the manual attached in an earlier post. The scan is not the best quality, but from memory, the diodes should only come into play when set to DC output and should not affect AC output.
These machines are basically an AC "buzz box" transformer welder with three output ranges selected by a jack plug in the front panel. Onto this basic "buzz box" is added a rectifier bank and a switchable HF unit. About as simple as they come really
Having verified the correct supply voltage connection as per the manual and that the correct voltage is reaching the transformer (eliminating a faulty switch etc) CAUTION, MAINS VOLTAGE I would then test for voltage output from the transformer with a multimeter. Test all three ranges and try a few different settings on the current adjustment (I am thinking that the female socket for the jack plug to the work/return lead should do it, but I have been wrong before. At any rate, you should be able to trace the outputs from the transformer.) I believe all this occurs before the diode bank, so set your meter on a range that will allow for 70VAC. In thinking about it, checking the actual outputs from the transformer would be the best idea as it eliminates the polarity change switch.
If no voltage detected on the outputs, then I think you may well be up the proverbial creek minus some vital boating equipment.
Of interest is the fact that the manual expressly recommends against multimeter testing diodes, instead suggesting a 6V battery and a test light. Times have changed indeed.
If the machine is deemed deceased, perhaps offer it on this forum to someone who may be seeking parts for a similar machine with a different issue rather than scrapping it. The slab you get in return may lessen the grief at losing a welder.
Let us know what you find and maybe a couple of photos of the innards would be handy as I can't tell much from the low resolution scans from the manual.
-
29th Feb 2020, 02:17 PM #19Novice
- Join Date
- Dec 2016
- Location
- Newcastle
- Posts
- 13
-
12th Jul 2020, 04:17 PM #20New Member
- Join Date
- Jun 2020
- Location
- Australia
- Posts
- 1
Similar Threads
-
CIG Transtig 150
By GuzziJohn in forum WELDINGReplies: 41Last Post: 14th Sep 2020, 10:33 AM -
Manual for EMF/CIG Cigweld Transtig 250 Tig Welder AC/DC HF
By argeng in forum WELDINGReplies: 1Last Post: 20th Jul 2013, 09:25 AM -
Looking for manual for CIG Transtig 250
By Vernonv in forum WELDINGReplies: 5Last Post: 4th Jun 2013, 03:17 PM -
DONE: Transtig 275
By Barterbuilt in forum METALWORK - Machinery, Equipment, MARKETReplies: 5Last Post: 2nd Apr 2013, 07:00 PM -
Transtig 250 EC manual wanted
By silash77 in forum WELDINGReplies: 8Last Post: 12th Nov 2012, 04:48 PM