BB Rider,
Miller does make some multi-process machines capable of MIG and TIG in the DC mode, but not in AC. Tigging .500" aluminum is going to require a Dynasty 300DX for regular use. A Syncrowave 250 will do it occasionally. The MM251X will handle all your MIG needs. The MM251X sells around $1700 and the Dynasty 300DX near the $5500 mark. Check out this link and explore the products by category:
www.millerwelds.com
Beveling and preheating are options, but it sounds like you have simply outgrown your equipment.
Miller does make some multi-process machines capable of MIG and TIG in the DC mode, but not in AC. Tigging .500" aluminum is going to require a Dynasty 300DX for regular use. A Syncrowave 250 will do it occasionally. The MM251X will handle all your MIG needs. The MM251X sells around $1700 and the Dynasty 300DX near the $5500 mark. Check out this link and explore the products by category:
www.millerwelds.com
Beveling and preheating are options, but it sounds like you have simply outgrown your equipment.
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