Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Jack Z
 
Posts: n/a
Default Home built TIG footpedal: need 14 pin wiring

I've built a foot pedal with a pot and a switch. It's for a Thermal Arc
250 GTSW which has a 14 pin connector. I've measured the voltages on the
connector and found more wires than expected.
Can someone tell me what the pins are used for. I would like to know what
all the pins do, even the ones I don't need for the foot pedal, if anyone
knows, as I plan to build a pulser for it latter.
I've called Thermal Dynamics twice and they said they would send me the
manual but so far nothing has arrived.
Here is what I measured with my VOM:
Pin Reading
A 25.9 VAC
B 0 V
C 0V
D 0V ( Approx 0 Ohms to ground )
E 0V
F Not connected
G 0V ( Approx 0 Ohms to ground )
H 42.9 VAC
I Not Connected
J Not Connected
K Not Connected
L 120 VAC
M 5.1 VAC
N 4.3 VAC
I was surprised to find no DC voltages.

Thanks for any help you can give
Jack


  #2   Report Post  
Jon Elson
 
Posts: n/a
Default Home built TIG footpedal: need 14 pin wiring



Jack Z wrote:

I've built a foot pedal with a pot and a switch. It's for a Thermal Arc
250 GTSW which has a 14 pin connector. I've measured the voltages on the
connector and found more wires than expected.
Can someone tell me what the pins are used for. I would like to know what
all the pins do, even the ones I don't need for the foot pedal, if anyone
knows, as I plan to build a pulser for it latter.
I've called Thermal Dynamics twice and they said they would send me the
manual but so far nothing has arrived.
Here is what I measured with my VOM:
Pin Reading
A 25.9 VAC
B 0 V
C 0V
D 0V ( Approx 0 Ohms to ground )
E 0V
F Not connected
G 0V ( Approx 0 Ohms to ground )
H 42.9 VAC
I Not Connected
J Not Connected
K Not Connected
L 120 VAC
M 5.1 VAC
N 4.3 VAC
I was surprised to find no DC voltages.


did you try measuring BETWEEN the pins, rather than relative to the
machine's
case (or the work clamp)? I am guessing the internal logic is floating, or
possibly "grounded" to some particular terminal inside the welder.

Jon

  #3   Report Post  
Keith Marshall
 
Posts: n/a
Default Home built TIG footpedal: need 14 pin wiring

I was surprised to find no DC voltages.

There may not be a DC voltage for the pot if the switch isn't made. I don't
know anything about your welder but I was curious enough to do a bit of
research. I couldn't find your specific model on their site and nearly
every similar model uses an 8-pin connector but I did find one model that
uses a 14. You can see the pinout for it on page 72 at:

http://www.thermadyne.com/tai/litera...430429_490.pdf

It seems to agree with your list for the most part but where you show 120VAC
on pin L it says it's not used.

Hope it helps!

Best Regards,
Keith Marshall


"Even if you are on the right track, you'll
get run over if you just sit there."
- Will Rogers (1879-1935).


"Jack Z" wrote in message
news:[email protected]...
I've built a foot pedal with a pot and a switch. It's for a Thermal Arc
250 GTSW which has a 14 pin connector. I've measured the voltages on the
connector and found more wires than expected.
Can someone tell me what the pins are used for. I would like to know

what
all the pins do, even the ones I don't need for the foot pedal, if anyone
knows, as I plan to build a pulser for it latter.
I've called Thermal Dynamics twice and they said they would send me the
manual but so far nothing has arrived.
Here is what I measured with my VOM:
Pin Reading
A 25.9 VAC
B 0 V
C 0V
D 0V ( Approx 0 Ohms to ground )
E 0V
F Not connected
G 0V ( Approx 0 Ohms to ground )
H 42.9 VAC
I Not Connected
J Not Connected
K Not Connected
L 120 VAC
M 5.1 VAC
N 4.3 VAC
I was surprised to find no DC voltages.

Thanks for any help you can give
Jack




Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Joining CPC's in Ring Main & Other Wiring Mike Hall UK diy 18 July 19th 04 07:50 PM
Cable colours for 110v fixed wiring Andy Hall UK diy 28 June 29th 04 07:28 AM
wiring a 3 phase compressor motor question wallster Metalworking 32 March 15th 04 01:11 PM
ENCO 1340 Wiring Diagram Bill VT Metalworking 8 March 14th 04 09:53 AM


All times are GMT +1. The time now is 12:56 AM.

Powered by vBulletin® Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Copyright 2004-2023 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"