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I posted this on th Miller Forum and thought someone on this forum might be interested:I am in the process of getting a new TIG machine and have traded my 180 SD so I now have a pulser that I had built for the 180 available. I had installed a small 24 VDC power supply in the 180 and brought that out to the pulser through the foot pedal connector. An external wall supply can easily be added to take the place of the supply I had added to the machine.It works very well (about a year now) but is a little different than the "usual" pulser in that there is no frequency control, just high time and background time (which varies the frequency). Using the high time and background time controls, the actual frequency coverage is from about .2 HZ to 33 HZ. Background current is variable from 5% - 95% of peak current. There is also an LED which is on during peak time and a switch to bypass the pulser altogether, though it does stay powered on all the time my welder is on. Pictures below.The unit plugs into the pedal connector and the pedal plugs into the back of the unit and mounts to the handle bar by a bracket that I made.If anyone is interested in this, I can add the external wall module for the 24 VDC (~$25.00) and it will be good to go. I'm not looking to make a killing on this but would like $100. to cover the 24 v supply and some parts and shipping. The brackets go with the unit, as well.
Reply:Nice job on the pulser. As I understand it, the value of the potentiometers determines which machines the pulser would be compatible with, basically you would need the same ohm value as the foot control designed for use with the machine, is this correct?
Reply:Thank you. The value of the pot really doesn't matter because the pot, when connected to the pulser, goes into an op-amp with very high input impedance. This buffers the pot. The output of the pulser is again going through another op-amp, which is very low output impedance feeding the machine. What does matter is the voltage across the pot, which is usually 10 volts but some machines may be different (?). As long as it is 12 volts or less, the pulser will work fine. This really worked nicely on my 180 SD, especially on the low-current settings (<50 amps) where I needed more control for some of the smaller items I was welding. On the hgih current settingsyou could easily setup for spot or stiching. It's effective frequency range is .2 HZ - 33 HZ. I just finally got fed up with hassling with other issues on the 180 and traded it in.
Reply:Sounds good. This would be a great value for someone wanting to pulse TIG. There are no manufactures making an add-on pulser any more, like the Miller PC-300, and they are rare to come by on ebay. I found an ESAB pulser and adapted it to my Thermal Arc power supply, then later found the ESAB power supply the pulser was designed to work with.
Reply:i want one for my Lincoln 175 TIG........what info do u need.? thermal arc 252i - millermatic 350P - miller XMT, cp300ts, 30a 22a feeders, buttload of other millers, handfull of lincolns, couple of esabs - Hypertherm 1250 G3
Reply:The foot pedal connector pin-out and the reference voltage across the pot in the pedal.
Reply:It would really be a shame to see this unit just collect dust and go to waste. Someone make me an offer that I just can't refuse.
Reply:Should I get this for my 180........... Synchowave 180SD Bernard 3500SS water coolerMillermatic 200Parker Plasma Tec 40dvOperating Engineers Local 12
Reply:Originally Posted by BruceTSShould I get this for my 180...........
Reply:check you PM....Synchowave 180SD Bernard 3500SS water coolerMillermatic 200Parker Plasma Tec 40dvOperating Engineers Local 12
Reply:I would be interested if no one else purchased it.
Reply:I'm interested as well! |
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发表于 2021-8-31 23:39:24