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Up Topic Welding Industry / General Welding Discussion / Capping bottoms
- - By dg09 (**) Date 12-19-2010 21:30
69 sa 200.  I'm having trouble capping the bottoms from 530-630.  Undercutting bad.  I don't have this problem at work.   Sa 200 is at home.   At work using a trailblazer and electric machines and I don't event touch the heat.  At home I've tried. Hanging heat, rod position, slowing down, but to no a avail.  Any ideas?    Pipe is 12 in h sch 80.  Rod is 3/16 and 5/32.   Heat is 3rd gear about 50
Parent - - By Superflux (****) Date 12-19-2010 22:07
Machine settings and actual volt/amp output are two different animals. Best approach to this would be to get some help and an appropriate Volt/Amp meter. Record your values from the machine(s) at work that are performing properly for you and then try to duplicate those same values with your sa200. Duplicate all variables...pipe size, material, electrode size and maufacture, EXACT position & height, same arm rest, same stinger..... It is very easy to change something and not realize it when practicing at home. Might even want to invite your shop Foreman over and have him breathe down your neck too (LOL).
OMG!!! A Trailblazer out performing an SA 200 is sacrelidge in these pages. Better get this sorted out soon!!!!
good luck
Parent - - By dg09 (**) Date 12-19-2010 23:37
I hear ya.   Not outperforming I guess just getin it sorted out
Parent - - By dg09 (**) Date 12-21-2010 00:37
Any other ideas??  I think I got it now somewhat
Parent - By dg09 (**) Date 12-21-2010 04:21
I check ocv and they are 91 and 115 at receptacle
Parent - - By Paladin (***) Date 12-21-2010 13:03
Have you tried stoning the armatures? I don't know if that will help but it is worth a try. Check your brushes.
Parent - - By dg09 (**) Date 12-21-2010 16:57
I did stone them and checked the brush too.  My exciter brushes still are about 3/4-1 in long still and the other brushes still look good to me.  I'm wondering if its better to put 300 amp brush in
Parent - By pipehead (***) Date 12-23-2010 17:06
just my opinion but 3rd and 50 seems a little cold..... i have always noticed if i'm a little cold i undercut a little more....or change up your travel pattern
Parent - - By NWPAwelder (**) Date 12-23-2010 17:23
How is you body positioning? Make sure you are as comfortable as possible. Are there some variables at home versus work that are different in regard to how you are setting yourself up? I know that if I am not under the pipe far enough and uncomfortable, then it is much harder to keep the bottom looking tight without undercut, especially with the 3's. Plus realize that the two machines do definitely have different arc characteristics and IMO require some subtle changes to the way it happens on the bottom in particular from one machine to the other. Try cooling off just a bit more as you are reaching 5:30 and sometimes even through 6:30 if need be. Depending on just how much heat you have built up contributes enormously to how well the bottom is going to successfully fill. Remember 3 of the things that affect undercut: 1-Heat, 2- Travel speed, 3- Rod angle. Also a fourth would be your Arc gap. I like to keep it as tight as I can and still maintain a decent puddle without snuffing it out. Others may do this a bit differently, but this seems to be working for me.
Parent - By dg09 (**) Date 12-24-2010 01:00
I turned my OCVs up to 93/94.  Now I'm running 4th gear about 25/30 for the bottom.  Lookin  a lot better.  Just about got it right.   The only thing now is refinin the ripples to be tighter.  Doesn't look bad but I can do better.   Thx for the input from all.   Any more ideas is always welcomed.   Happy holidays to all. Be safe
Up Topic Welding Industry / General Welding Discussion / Capping bottoms

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