http://www.mtpturbo.com/mtpguest/welder_schem2.jpg (partial schematic)
http://www.mtpturbo.com/mtpguest/dta250_schematic.pdf (full schematic)
Hi all, I've got an old ESAB AC/DC TIG welder that has me scratching my head and I'm hoping some of you more skilled in the art of welder repair can...
***UPDATE***
I spoke with Dennis at ARCO welder repair who seems to know these machines better than anyone and think I have it figured out... It turns out that removing the pot currently mounted on the front panel and rotating the PC board with the panel/remote switch etc lines up the board...
http://www.mtpturbo.com/fairmont/ESABDTA250UM.pdf
Looks like it won't link with spaces in the filename, I have renamed the document (removed spaces) link above.
MTPTurbo
Thanks for taking a minute to look it over, I guess I better add some info... there is a foot pedal current control (it measures 82k ohms at rest, and approaches zero ohms when fully depressed) which is wired across nodes 30 and 31. The "remote switch" activates the main contactors to make the...
http://www.mtpturbo.com/fairmont/dta250schematic.jpg
I am hoping that those of you who are more electrically inclined can give me a hand with this one. I recently bought an old ESAB (DTA 250 UM) tig welder and pulled the covers off to clean it out and discovered some butchered wiring. I...
I figured it out...(grabbing the inches deflection in my worksheet formula rather than the radians and it happened to be a 4" radius, hence the 4x error...
Thanks for looking anyway...
MTPTurbo
I am doing a torsional study of several gearbox components and am attempting to use Ansys design space to compare different designs. Suspicious of some of the results I was obtaining, I modeled a simple cylinder 8 inches in diameter and 12 inches long with an applied moment (35000 ft-lbs) at one...
We have yet to see any tip breakage failures, but are only recently getting into 25 degree PA gears (most of our older products use 20 degree PA's). As far as liability, we might lose some high volume accounts, should field failures occur. My guess would be that broken tips themselves might not...
I would think that the core hardness would be greater with the extra carbon. What core hardness are you now specifying?
Couldn't you live with .030 to .045 depth of 50Rc case?
-we don't specify
That seems like a lot with an 8 dp gear. Is this after grind? I assume these are ground.
-they are...
More info on one of the parts in question:
We have a gear that is 8 DP, w/ 30 teeth the face width is in excess of 2 inches. We currently specify an effective case depth of 0.035"-0.040" (thus providing the window/target of 0.005" I spoke of in my previous posts). Our heat treater would prefer...
Thanks for taking the time to offer your thoughts. We have thoroughly evaluated these designs using UTS gear design software to determine the case depths needed to support the design load, however doing so suggests a "window" which is rather narrow (typically only 0.005")and difficult for our...
We are trying to determine an appropriate case depth "window" for some of our carburized 8620 parts (8dp, 25 degree PA) and are reluctant to widen it much beyond our current specs. Our Heat treater's metallurgist would like us to provide a minimum and consider anything in excess of that amount...
