I want to print Ultem with my F306. I will need to achieve 350 c . I need some tech advice, Thanks!

Best advice, talk to Mike or Chip at Fusion3

Does the F306 use the Duet board?

You will need to build an enclosure.

You will need to add a thermocouple to the hotend.

You will need to heat the chamber a bit to get decent prints with Ultem®

We’ve been looking at modifying an F400 for this purpose and spoke to Chip&Chris® about it, Chris is willing to help modify the firmware for the Duet, though this information is already available, really you just need the Thermocouple: E3D Type K Thermocouple (Bare or Cartridge) - Filastruder control board https://www.filastruder.com/products/external-thermocouple-board-v1-0 and some good Ultem Ultem 1010 3D Printing Filament | High Performance Materials | Made in the USA

Thanks for the info. I’ll get in touch with Chris.