Since you have a Pfaff - Pfaff put out an embroidery design CD for 30 weight thread. You might see what it required to use 30 wt for embroidery on a Pfaff site or forum. Even dealer might know. Consider any special settings even if designs were made for a 2170. Embroidery is usually very high speed so any tension or needle settings might apply.
Here is one article for a mug rug with 30 wt thread:
7d14fd2a-733a-48e1-9d99-39d06ca2ab1c-1.pdf
To use - copy and paste into search bar or search for Needle Keeper Pfaff