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02/17/2021 7:20 PM
When your wife thinks 30 grams for a 6 cup setting is strong, you learn to drink muddy water when you are making coffee for both of you.

02/17/2021 8:32 AM
I use a rule of thumb of 60 grams per liter. 8 cups (1 liter, 32 oz) = 60 grams, 6 cups (3/4 liter, 24 oz) = 45 grams. 10 cups = 75 grams 12 cups = 90 grams

02/17/2021 1:47 AM
OldMan41, depends what is "a pot"... usually is more accurate to specify the brew ratio, instead grams of coffee. The most usual is 1:15, thus 40 grams for 600 ml of water. If the 100 grams are for one liter pot, then we are talking about 1:10 ratio.

02/16/2021 10:13 AM
Hey! I looked into how many grams per pot of coffee. WOW! 100grams? I only use 40+ish. Anybody else???

02/10/2021 7:05 AM
Thanks JackH. Just have so many other projects going, haven't taken the time to get on here. From time to time I would just glance and see what was going on.

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Info on DC motor power of poppers
tnakir
Any of you guys know what is the power rating of the DC motor of Severin Popper (220V)?

I am about to separate the motor from the heating coil circuit and I don't know what AC > DC converter to get. I have some 24V 0.8A PSU, and I'm not sure it will be powerfull enough.
renatoa
Is not enough, you need a 2A source.
These are usually clones of Johnson/Mabuchi RS385 motors, whose specs state 0.4-0.5A current, but without specifying which regime.
Looking into the datasheet we see this current is for maximum efficiency case, which is a very small load regime, compared with the popper scenario.
Tried 1A source to power such motor, from a Zilan popper, and voltage dropped to 19V from 24, so I guess some kind of over-current protection kicked.
starbuxed

Quote

renatoa wrote:

Is not enough, you need a 2A source.


So would a 24V 2A Power supply work? or is a 24V 5A power supply a better choice?
greencardigan
I used to use a laptop power supply that had a voltage switch for various voltages between 15 and 24 volts.
ChicagoJohn
On a 120VAC popper mod I did, I used a 24VAC transformer with input from a rotary dimmer switch output through a full wave bridge rectifier, unfiltered. (I wound up operating it at full power so the dimmer switch wasn't necessary, controlling heating with PWM). That transformer got way too hot and I wound up using a 50VA transformer which got hot but remained within acceptable maximum temperature limits. I have no familiarity at all with 240VAC systems, but if the popper designs are otherwise similar, I would think 2A continuous is probably marginally adequate with the caveat that I've seen some instances in which manufacturers state current ratings for transformers that a are significantly higher than they can deliver continuously..
So many beans; so little time....
renatoa
If you have doubts about a transformer, weigh it, a real 50W transformer for industrial use, i.e. continuous operation at maximum 75 C degrees, should be in the 900 g ballpark.
Wiz Kalita
I'm using this popper. It's a 20V motor that draws 2A, and I'm driving it with a 20V 3.25A laptop PSU.
tnakir
Did you leave both heat coils connected in series? Just disconnected the motor?
Wiz Kalita
I removed all the electronics and connected it to a CR3 setup. I don't remember if I left both coils or how I wired them.
tag1260
What happens if you just disconnect the motor from the coils? Do you still run both coils or does it create a problem?
renatoa
No problems.
In the parallel configuration heater power is reduced by about 200W on 230V or 100W on 110V.
tag1260
Thanks. I just yesterday split my motor and heater and was wondering if it were a problem. Tried my first batch today and it worked great but I will have to practice my control.

Thanks again
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