[Plugin: Advanced Custom Fields] How to output taxonomy field?

You should add the term id to the second parameter. It should look something like ‘machinecategory_34’ where 34 is the term_id.

If you’re doing this in your archive/taxonomy page, you can do the following:

echo get_field('machine_tax_description', 'machinecategory'.$wp_query->queried_object->term_id);

This works for me ??