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Resistance control aids welding repeatability

An Acal TC product story
Edited by the Engineeringtalk editorial team Jul 28, 2003

A novel "resistance set" feature reduces contact resistance prior to the application of welding current, allowing users to achieve more repeatable resistance welding results.

A feature designed to reduce contact resistance prior to the application of welding current, thus achieving more repeatable resistance welding results, has been added to a range of products from Townsend Coates.

Now available in the UB25, DC25 and HF25 products, from Unitek Miyachi, the feature is especially useful for welding small parts where consistent part placement is difficult to achieve.

Contact resistance can be influenced by many factors including part placement, varying part overlap and part surface conditions.

It is not uncommon, especially in miniature part welding, for contact resistance to vary by as much as 50% due to inconsistent part placement.

Unitek's new "resistance set" is easy to program and can greatly reduce the negative effects of varying contact resistance.

By bringing the contact resistance to the same low level for each and every part, the resistance set feature permits consistent heat generation based on the bulk resistance of the parts.

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