I have a Saeco espresso machine. When I place the portafilter into the machine, it is very difficult to turn and lock. Do you have any suggestions?
As your question is very open I will try to answer two common roots of your problem.
1) Too much coffee. Per cup of espresso it should be 7g of ground beans.
2) No "tamping". You probably did not compress the powder in the porta filter (called tamping). This is what it looks like:
So maybe you compressed it when you tried to place it in the machine.
In addition to Damian's answer (too much coffee or insufficient tamping), have a look at how the portafilter seals onto the group head. There should be two things you'll notice: a) a shower screen and b) threads that seal the portafilter onto a rubber washer. The following things might make the portafilter hard to turn
- Shower screen is grimed up and has protruding caked coffee on it.
- There are coffee grinds in the threads.
- There are coffee grinds caked onto the rubber washer.
- The rubber seal is crumbly and has cracked or expanded, protruding lower than it should (this is unusual)