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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
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| tnakir |
Posted on 09/13/2018 2:22 AM
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 Newbie  Posts: 2 Joined: August 04, 2018 |
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. |
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| renatoa |
Posted on 09/13/2018 2:36 AM
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Administrator  Posts: 1609 Joined: September 30, 2016 |
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. |
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| starbuxed |
Posted on 09/13/2018 3:40 PM
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Newbie Posts: 5 Joined: September 10, 2018 |
Quote So would a 24V 2A Power supply work? or is a 24V 5A power supply a better choice? |
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| greencardigan |
Posted on 09/13/2018 6:32 PM
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 1 1/2 Pounder  Posts: 1131 Joined: November 21, 2010 |
I used to use a laptop power supply that had a voltage switch for various voltages between 15 and 24 volts. |
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| ChicagoJohn |
Posted on 09/13/2018 8:18 PM
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 Pounder  Posts: 511 Joined: June 15, 2015 |
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.... |
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| renatoa |
Posted on 09/14/2018 2:21 AM
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Administrator Posts: 1609 Joined: September 30, 2016 |
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. |
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| Wiz Kalita |
Posted on 09/14/2018 9:42 AM
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Newbie Posts: 49 Joined: August 06, 2018 |
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. |
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| tnakir |
Posted on 09/18/2018 2:13 PM
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Newbie Posts: 2 Joined: August 04, 2018 |
Did you leave both heat coils connected in series? Just disconnected the motor? |
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| Wiz Kalita |
Posted on 09/19/2018 2:34 PM
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Newbie Posts: 49 Joined: August 06, 2018 |
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. |
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| tag1260 |
Posted on 04/16/2019 12:26 PM
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Newbie Posts: 13 Joined: April 15, 2019 |
What happens if you just disconnect the motor from the coils? Do you still run both coils or does it create a problem? |
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| renatoa |
Posted on 04/16/2019 2:50 PM
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Administrator Posts: 1609 Joined: September 30, 2016 |
No problems. In the parallel configuration heater power is reduced by about 200W on 230V or 100W on 110V. |
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| tag1260 |
Posted on 04/16/2019 10:20 PM
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Newbie Posts: 13 Joined: April 15, 2019 |
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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