Routine incomplete prints

[m7artstx]

We have a Raise3D E2. The right nozzle reliably jams after about 5-8 hours of continuous printing. We've had the machine for over a year now and we've given up on attempting to print any large projects on it. The nozzle tends to jam no matter what kind of filament we put in it. Doesn't matter where the filament came from or what condition it is in. Because the nozzle jams so frequently, we end up cleaning the nozzle every 3 days or so. Once the nozzle is cleaned, we can print simple projects continuously as long they are about 5 hours long. We can't print complex objects at all without getting jams.

Not sure what to do.