This depends on the initial cannabis material you have. Here is a short answer. Note it and try not to lose, as this info is very important for the best results. So, the best pressure for rosin, depending on the weed material is:
Hash – 300 to 700 psi at 170° to 190°F;
Kief – 400 to 800 psi at 170° to 190°F;
Flower – 600 to 100 psi at 215° to 230°F.