how to set 300D rpms

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I recently had my lincoln 300D repaired. The throttle pin coming off the solenoid to the governer snapped.  When I went to weld after the repair my rpms were to low and causing an erratic weld puddle. I adjusted the set screws to make machine idle higher but still don't know if I'm running proper rpms. Does anyone know how to dial the rpms in? Its a perkins 404-22d.
Reply:Man ain't nothing worse than a sick welding machine. Kinda like one of your kids getting sick. I want to make it better, just hope I don't make it worse. The repair shop is so busy and I know I can fix it myself with a lil guidence. Any suggestions?
Reply:I've welded (and adjusted  ) with a whole bunch of 300D's in my life.  What you will find is the the RPM's needs to be pretty close to 1800 for it weld right.  If they are low the arc gets rough and erratic (you already said that) and if they are too high then its a bear to stack metal with and to cap a bottom with.  Way too much drive IMO.You are going to need a good tachometer.  I have an Omega Digital hand held unit that is a little pricey, but its a good one and works real well.  You could use the old fashion way of going only by the OCV's but I can't recommend that.  (only when in a pinch).  If you only have a voltmeter then turn your remote to 100 and put the machine on high idle and adjust it so it reads at least 98 when its warmed up.  I actually don't like a 300d set to 98 but that I think is the factory setting.  At that OCV your RPM's should be about 1800 if the generator and exciter are good.  I much prefer an ocv of about 102 to 105 because of the smoother arc I though those machines gives there.Most times in the past when I was facing welding with a 300d I'd raise the RPM's so I could get enough heat on 150, but set like that it was a bear to cap the bottom with.  Trying to run 200 I could never get any of them really dialed in to where they capped good for me.  I was either breaking arc or running 5 too hot.  Either way I could always feel that 60 hertz in there but thats another topic for another day. Good luck guyLaterLast edited by slowhand; 10-26-2010 at 07:07 PM.
Reply:Originally Posted by slowhandI have an Omega Digital hand held unit
Reply:Thanks slowhand. I only had a voltmeter and we dialed it in today. And just like you said 98 was not as good as 102. Its now dialed in. I appreciate your info and thanks again.
Reply:Here's the one I have.http://www.omega.com/ppt/pptsc.asp?r...tID=HHT12&Nav=It comes with a couple silver reflective adhesive strips that I cut into small pieces (about 1/2" x 1/4") and affix onto the engine I'm wanting to test.I've had mine since 05 I think and it has worked great so far.  I use it often.As I said above.  I recommend you have a tach because IMO the OCV is only a reference.  If the machine keeps putting out the proper OCV at the right RPM then you should also be able to expect your generator and exciter are continuing to work properly.  If one day you find its not putting out the expected OCV at the right RPM then you know something is amiss in there and needs attention.Glad you got it working.  Good luck with your machine.Later
Reply:Thanks for posting the link slowhand.I have this one, same basic principle. I forgot how much I paid for it. Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Thanks for advice. I'm going to put a tachometer to it as soon as I get a chance. Works been kinda of hectic and got 2 kiddos to entertain after work. Again thanks