Hi Mudbone!
I personally could'nt answer your question without knowing more about the details regarding the design and makeup of your specific manifold gas delivery system and how it is integrated into your weld cells but, if you were to describe more details of the system to a gentleman who I consider an "Expert" in GMAW robotic welding cell design optimization. A proven "genius" in diagnosing & correcting problems to pointing out common mistakes made in the decision making process due to a lack of proper education regarding welding process control and management...
This link will enable you to pose your query directly to Ed so long as you are able to supply him with more specific details involving your shielding gas delivery system:
http://www.weldreality.com/discussion/
Ed should be able to steer you in the right direction...
Hope this helps.
P.S.Don't forget to at least check out the educational materials Ed has available for purchase.
Respectfully,
SSBN727
Run Silent... Run Deep!!!