Adding a foot pedal to a 98233 (165A) tig
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  1. #1
    Join Date
    Oct 2008
    Posts
    25

    Adding a foot pedal to a 98233 (165A) tig

    Seeing as I Still cant afford a proper tig ....

    So I purchased the 165A unit about 2 months ago and I can say I was happy with it so far ,but I wanted some sort of remote amp control as well as a way to free up my hand from the HF start button ,

    It ended up being really easy
    the hardest part was finding a 5k ohm pedal but after searching on ebay for a week or so i managed to find one

    as well as a 7-pin bulkhead connector the same size as the one in the machine

    after that all you need is a 3pdt on-on toggle switch and a bit of patients
    run the three wires from the circuit board to the common row on the switch the lower row of the switch goes to the pedal and the pot on the machine

    Machine----------Pedal-----------Function
    From Board
    Green ------------Green----------Hot
    Black--------------Yellow----------Wiper
    Blue----------------Red------------Ground
    At Socket
    Black--------------Black----------HF Start
    Black--------------Brown---------HF Start

    so now all you have to do is find a place to mount the switch I ended up putting it dead center and even with the top louver

    with it wired up like this you can use the pedal for remote amp control and HF Start or use the dial on the machine with the pedal or a momentary switch mounted on the torch for just HF Start

    so for around $465 I have a welder with most of the things I need ...for now

    Ive got pics and will post them when my camera decides to cooperate with my computer
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  2. #2
    Join Date
    Aug 2006
    Posts
    194

    Re: Adding a foot pedal to a 98233 (165A) tig

    Great info! I am sure this is going to be very useful to many. Thanks!

  3. #3
    Join Date
    Jul 2007
    Location
    Columbus Ms
    Posts
    170

    Re: Adding a foot pedal to a 98233 (165A) tig

    Pics would be helpful as well.

  4. #4
    Join Date
    Oct 2008
    Posts
    25

    Re: Adding a foot pedal to a 98233 (165A) tig

    Ok here are the pics

    1) Wiring diagram
    the wires we are working with are
    13(green)
    14(black)
    15(blue)
    ch11-1(black),
    ch11-3(black)
    2) The top circuit board (unplugged connector id the one we want)

    3) The 3pdt switch

    4) The new 7 pin bulkhead connector

    5) The switch and bulk head connector mounted

    sorry for the bad pics
    Attached Images Attached Images      
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  5. #5
    Join Date
    Aug 2009
    Posts
    10

    Re: Adding a foot pedal to a 98233 (165A) tig

    Hi,
    I'm a noob to the forum, but not to welding. I just purchased the HF 98233 machine and was looking around the web to see if anyone had tried putting a foot control on it, and sure enough, here it is! Has anyone besides partsguy22 made this mod to their machine, and if so, how has it worked out? I have already purchased the parts required, with the exception of the foot control itself, which I'm having a hard time locating. If anyone has info on what pedal was used, where to get it, and what modifications, if any, are required to it, I would really appreciate hearing from you. I PM'ed partsguy a couple of days ago with some questions, but haven't heard back from him yet. I'm kind of surprised there hasn't been any activity on this thread since March. I'd have thought more people would be interested in making this change/addition to their machine.
    Also, if there are any tips, hints, warnings, or general comments regarding this particular machine, I'd welcome those too.
    This is a great forum - lots of knowledgeable and helpful folks here.
    Later,
    Pete

  6. #6
    Join Date
    Oct 2008
    Posts
    25

    Re: Adding a foot pedal to a 98233 (165A) tig

    sorry i havent replied ..

    i found the pedal on ebay ..its for something like a everlast or longevity ..or any other chinese welder with a 5 wire hook up and a 4.7k ohm ...i have also added a 50k ohm in line with the signal wire to be able to set max amprage (it will knock it down to 40a max)
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  7. #7
    Join Date
    Jun 2009
    Location
    Arkansas
    Posts
    214

    Re: Adding a foot pedal to a 98233 (165A) tig

    Looks like alot of research went into this pedal project. I can tell someone knows there@#$%!
    I lack in the electronics department. I am impressed with your knowledge, which comes to my question
    I have a Thermal arc 185 AC/DC inverter tig welder. They want close to $300 for a foot pedal.Not gonna do it! I'm not sure if I made a mistake buying a Lotus foot pedal off of Ebay for $69+ shipping . It seems to be of a pretty good qaulity for the price. The pins dont match up but I got in touch with Tyco electronics and found a matching male plug that will fit the welder, #206434-1.
    The pedal that I purchased has a 5 OHM pot that has 3 wires conected to it(red-yellow-green). Has a on/off pedal switch with 2 wires Black and Brown.
    TA185 AC/DC tig welder diagram:
    Pin# 1........chasis ground
    Pin# 2.......contactor control/+24VDC
    Pin# 3.......contactor control/GND
    Pin# 4.......not used
    Pin# 5.......potentiometer maximum
    Pin# 6.......potentiometer minimum(GRN)
    Pin# 7.......amperage control wiper 0-10 VDC
    Pin# 8.......not used
    Can this pedal be wired in to fit this welder from the info I provided? If need be I can put up more info from the diagram schematic. Any help would be greatly appreciated!

  8. #8
    Join Date
    Oct 2008
    Posts
    25

    Re: Adding a foot pedal to a 98233 (165A) tig

    I don't see why not as long as the resistance of the pot in the pedal matches the machine

    you would have to figure out which one of the three pedal pot wires go to which terminals in the pedal .ie what wire goes to the pot gnd ,pot power ,and the wiper then connect them to the corresponding pins on the machine and hook up the contactor pins to the on/off switch in the pedal.....
    you should even be able to skip all the internal (inside the maching) junk since you T/A has a pedal option
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  9. #9
    Join Date
    Jun 2009
    Location
    Arkansas
    Posts
    214

    Re: Adding a foot pedal to a 98233 (165A) tig

    Pics of the Lotus pedal

  10. #10
    Join Date
    Jun 2009
    Location
    Arkansas
    Posts
    214

    Re: Adding a foot pedal to a 98233 (165A) tig

    CPC connector is from TA185 AC/DC inverter welder
    Attached Images Attached Images      

  11. #11
    Join Date
    Oct 2008
    Posts
    25

    Re: Adding a foot pedal to a 98233 (165A) tig

    thats the same pedal I have

    so it seems you would connect as follows

    1---?
    2---brown
    3---black
    4---not used
    5---green*
    6---red*
    7---yellow

    *you might have to swap these two depending on how the machine is set up*
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  12. #12
    Join Date
    Jun 2009
    Location
    Arkansas
    Posts
    214

    Re: Adding a foot pedal to a 98233 (165A) tig

    From what I researched according to my schamatic on my machine TA185:
    #1 no pin=ground
    #2 "" =contact switch black
    #3 "' =contact switch brown
    #4 ""=connected to #8 pin(pins soldered together
    #5 "" =green wire max pedal (OHM)
    #6 "" =red wire min pedal (OHMS)
    #7 ""=yellow wire middle pot wiper arm.
    #8 "" =connected to #4 pin (soldered to #4)

  13. #13
    Join Date
    Jun 2009
    Location
    Arkansas
    Posts
    214

    Re: Adding a foot pedal to a 98233 (165A) tig

    Partsguy22 Check this site supplier from China. check out the prices.
    http://www.alibaba.com/product-gs/21...g_Machine.html
    Makes you wonder how much money is to be made off China industries but then again, maybe why our country is going down! (MADE IN CHINA!)
    Any way thanks for your reply and help!

  14. #14
    Join Date
    Aug 2009
    Posts
    10

    Re: Adding a foot pedal to a 98233 (165A) tig

    That's the pedal I have also. I got it hooked up and tested it yesterday. Sweet! I would still like to add a range adjustment, but am not sure what value pot to use, and should it be connected in series with the wiper on the pedal pot?
    Thanks,
    Pete

  15. #15
    Join Date
    Oct 2008
    Posts
    25

    Re: Adding a foot pedal to a 98233 (165A) tig

    i used a 50k but you could use something larger like a 100k

    i just wired it in as a variable resistor
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  16. #16
    Join Date
    Aug 2009
    Posts
    10

    Re: Adding a foot pedal to a 98233 (165A) tig

    Should the range pot be spliced in to the yellow wire (wiper) on the pedal pot?

  17. #17
    Join Date
    Oct 2008
    Posts
    25

    Re: Adding a foot pedal to a 98233 (165A) tig

    from what i remember i wired it into the red wire (volt supply)
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  18. #18
    Join Date
    Aug 2009
    Posts
    10

    Re: Adding a foot pedal to a 98233 (165A) tig

    OK, thanks, I'll give that a try.

  19. #19
    Join Date
    Aug 2009
    Location
    albuquerque, NM
    Posts
    12

    Re: Adding a foot pedal to a 98233 (165A) tig

    how is the arc side of the welder? I have a miller mig but i'd like to learn to arc a little and some light mild steel tig'n would be good too. what limitations does the welder have as far as thickness of material it can penetrate?

  20. #20
    Join Date
    Aug 2009
    Location
    albuquerque, NM
    Posts
    12

    Re: Adding a foot pedal to a 98233 (165A) tig

    I did it. Made the plunge and got the good ol' 98233, i like it so far, maybe more if it had a pedal, so i started looking for the parts you mentioned and came across this... any ideas before i order it?


    http://cgi.ebay.com/Harbor-Freight-T...3286.m20.l1116

  21. #21

    Re: Adding a foot pedal to a 98233 (165A) tig

    Would a volume control pedal work for this? Or does it have to be one of the tig-specific pedals?

  22. #22
    Join Date
    Dec 2009
    Posts
    12

    Re: Adding a foot pedal to a 98233 (165A) tig

    Partsguy22, (or anyone else who had done this mod)

    Thanks for your post, I just got my HF last week and would like to install your mod. I do have a couple of questions, pardon my ignorance, I am brand new to tig welding and have bought this machine to learn the process.

    1. What function does the switch on the front panel actually do for the welding process and when would you use it?

    2. You mentioned a variable resistor, where is it actually hooked up? a red wire was mentioned, did you cut the wire and intall it in between the two ends? Also what pin does this red wire connect to in the welder, (I don't want to use the wrong one)

    3. Now that you have completed the process do you have an updated schematic or wiring diagram?

    Again, thanks for the work you did and sharing it here!
    Dan

  23. #23
    Join Date
    Dec 2009
    Posts
    12

    Re: Adding a foot pedal to a 98233 (165A) tig

    Well after a detailed review of the schematics and picking though the different posts this is my conclusion of the total process, Please correct me if I missed something or got it wrong.

    Synopsis of the modification:
    The internal potentiameter (output control pot) will be bypassed by an externally mounted switch to tranfer control to the added pedal. The standard torch 2 pin bulkhead connecter will be removed and replaced with a 7 pin part to accomodate the extra pins required for the pedal to work properly. The pedal will effectively become the output pot and gas flow control and the switch on the front panel allows the user to switch between pedal or front panel pot output power control.

    I am still not clear about the purpose of the additional pot that is mentioned in earlier posting in this thread??

  24. #24
    Join Date
    Oct 2008
    Posts
    25

    Re: Adding a foot pedal to a 98233 (165A) tig

    I think the pedal is to touchy so the add on pot changes it so that full throttle amps can be set to anything from 47 to 165 amps
    Fire Power FP160 mig
    Harbor Freight 165 amp tig w/ foot pedal
    Lincoln AC 225
    Victor O/A

  25. #25
    Join Date
    Apr 2010
    Posts
    11

    Re: Adding a foot pedal to a 98233 (165A) tig

    Quote Originally Posted by partsguy22 View Post
    Seeing as I Still cant afford a proper tig ....


    with it wired up like this you can use the pedal for remote amp control and HF Start or use the dial on the machine with the pedal or a momentary switch mounted on the torch for just HF Start
    Did the 98233 come with HF Start or did you add it? I want it to have HF Start but it doesn't mention it on the Harbor Freight web page for the welder, or in the manual. I'm ready to buy one but I don't want to do scratch starting. I definitely want to add a foot pedal. Great info on adding the foot pedal!

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