Well, I think it is a first. Back in the thread "Peppina Marries MiniGaggia" there was a brief discussion of attaching a pressure gauge to the piston to monitor the pull pressure. Disregarding the spirited discussion about the necessity
, Happy Tamper offered to send me his lever machine to "play" with and modify if I could.
I am going to outline just what I did, step by step, should anyone else want to follow in our footsteps, but I will start off this thread with a Final photo.
In addition, the whole point of this exercise, I want to experiment and document how pull pressure profiles affect the shot. Are isocratic best, does a decay work best, are we actually at 9 bar? That whole thing. Real data
It is not quite finished, but is very close. While I have people here, I wanted some advice before final assembly. The machine has been apart for a couple months now. Upon test fitting everything, I notice the lever gaskets are very tight in the group head. Should I lubricate them. They are fine and pliable. I would prefer not to have to get lubrication just for this little job if it can do without it, but also don't want to have to break some locktight to add lubrication should there be leaks due to lack of lub. Anyone care to give me some experience based advice?
Disregard the nail as lever pin - I left the pin at work. Sigh - almost done.