SO, on another thread, we were discussing replacing the timer switch with a DPST, effectively turning a timer model into an automatic. We ran into a bit of a difference in operation in some of our auto neuterings, and discovered a jumper setting choice that I was unaware of earlier. It seems that when taking the upper and lower microswitches off of a Mazzer Automatic:

If you want it to work like a car (you have to turn it to 'start' to get it to go, and it spring loads back to 'on' and stays running til you turn it to 'off') just jumper the lower switch. If you want it to work like a simple on-off switch, with the 'start' position being superfluous, jumper both!

I'm not sure if or why there would be a preference for one over the other, but I've been using the former set-up forever, and I would feel oooky if the thing came on as soon as I hit 'on'. I dunno why...

I jumpered my top cut-off switch, but left the doser switch intact. That way I can thwack to start the grind, then turn the switch off to stop it. I only turn it all the way to start if I am grinding for drip.

What I am considering doing is putting some kind of timer in where the old cut-off was connected, to start the grind by thwacking, and then have it stop after a set time (and then probably stay off for a couple more seconds so I don't inadvertantly start it again by thwacking too soon!). Needs some thought, but I reckon it will work quite well for me.

Psyd wrote:SO, on another thread, we were discussing replacing the timer switch with a DPST, effectively turning a timer model into an automatic. We ran into a bit of a difference in operation in some of our auto neuterings, and discovered a jumper setting choice that I was unaware of earlier. It seems that when taking the upper and lower microswitches off of a Mazzer Automatic:

If you want it to work like a car (you have to turn it to 'start' to get it to go, and it spring loads back to 'on' and stays running til you turn it to 'off') just jumper the lower switch. If you want it to work like a simple on-off switch, with the 'start' position being superfluous, jumper both!

I'm not sure if or why there would be a preference for one over the other, but I've been using the former set-up forever, and I would feel oooky if the thing came on as soon as I hit 'on'. I dunno why...

I use the latter (both jumpered). Leave it always in the on position with grinder power cord plugged into an external timer (Gralab 450's) which then completely controls the grinder auto start/stop grinding in 0.1s resolution. Running both Majors and SJs this way. How beneficial this would be for home would depend on usage style but way beneficial cafe. For me isn't beneficial for home since never keep beans in hopper and often as not grind different beans back to back.

miKe mcKoffee wrote:I use the latter (both jumpered). Leave it always in the on position with grinder power cord plugged into an external timer (Gralab 450's) which then completely controls the grinder auto start/stop grinding in 0.1s resolution. Running both Majors and SJs this way. How beneficial this would be for home would depend on usage style but way beneficial cafe. For me isn't beneficial for home since never keep beans in hopper and often as not grind different beans back to back.

That would certainly be the easiest way to run a timer. Like Mike I grind per shot & use different beans most days so the simple on/off function works fine for me.