Revisiting this old thread: https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ--- Synchronet 3.18a-Linux NewsLink 1.113
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like 23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire
2600 turns.
Since they are two different diameter wires, aren't they parallel?
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams Sys
6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the hold
coil on the outside?
Serial are wound from one end to the other with a tap part way through?
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping both
the hold and power energized. Both fields collapse simultaneously, so
only one diode needed.
--
http://orcalcoast.com/
easiest way is to look at the diode. if there's two diodes,
it's parallel wound. if there's one diode, it's serial wound.
All EM flipper coils (no diode) that i have ever encountered
are serial wound.
On Monday, December 28, 2020 at 6:34:18 PM UTC-5, LexingtonVAPin wrote:
Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ >>
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like
23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire
2600 turns.
Since they are two different diameter wires, aren't they parallel?
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams Sys
6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the hold
coil on the outside?
Serial are wound from one end to the other with a tap part way through?
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping both
the hold and power energized. Both fields collapse simultaneously, so
only one diode needed.
--
http://orcalcoast.com/
The 25-500/34-4500 is used in a Bally could be a parallel coil, but they never used a cap on the EOS or flipper switch (that I am aware of).
LexingtonVAPin wrote:
The 25-500/34-4500 is used in a Bally could be a parallel coil, but
they never used a cap on the EOS or flipper switch (that I am aware of).
They are, I unwound one to find that out. The primary flip circuit is
in the center and the hold is around it. They have 2 diodes on them as well.
Now, when williams came up with advertising "parallel wound" coils, they might have referred to the coils having both the primary and hold coils being wound in parallel at the core, vs. having all of the flip coil
then the hold coil windings within each other - this would help with
heat dissipation I'd think.
On 12/29/20 7:31 AM, cfhatprovidedotnet wrote:
easiest way is to look at the diode. if there's two diodes,
it's parallel wound. if there's one diode, it's serial wound.
All EM flipper coils (no diode) that i have ever encountered
are serial wound.
On Monday, December 28, 2020 at 6:34:18 PM UTC-5, LexingtonVAPin wrote:
Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ >>>
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like
23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire
2600 turns.
Since they are two different diameter wires, aren't they parallel?
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams Sys
6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the hold
coil on the outside?
Serial are wound from one end to the other with a tap part way through?
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping both
the hold and power energized. Both fields collapse simultaneously, so>>> only one diode needed.
--
http://orcalcoast.com/
That is what I always thought too.
In looking at how these coils are wired, in one setup, the EOS switch
shorts out the hold coil. When it opens up, both the power and hold
coils are connected. When the flipper switch is released, both windings collapse at the same time, so only one diode - across both - is needed.>
In the newer setup, the EOS switch is connected in series with the power coil. On the flip, both power and hold coils are initially powered.
When the EOS opens, the power coil is disconnected and a diode is
required for the back EMF.
The hold coil stays powered. When the flipper switch is released, the separate diode is required for the hold coil.
I am looking at two coils: 11630 and 25-500/34-4500. The obvious > difference between the two is that the 11630 is wired with both coils to
the left lug (viewed from the plunger side), power to the center and
hold to the right.
With the other coil, two wires go to the center. Power to the left and hold to the right. Both coils have two diodes.
The 25-500/34-4500 is used in a Bally could be a parallel coil, but they never used a cap on the EOS or flipper switch (that I am aware of).
I looked at a Gorgar. Williams supposedly used serial coils. It is a 19-400/30-750. It looks exactly like the 25-500/34-4500 in that the
power connections are left/center and the hold is center/right. A
single diode is on it. It is wired just like the early Bally, with the
EOS shorting out the hold coil.
What makes a coil serial vs parallel?
https://flic.kr/p/2kmRDZk
https://flic.kr/p/2kmR5eZ
LexingtonVAPin wrote:
The 25-500/34-4500 is used in a Bally could be a parallel coil, but
they never used a cap on the EOS or flipper switch (that I am aware of).
They are, I unwound one to find that out. The primary flip circuit is
in the center and the hold is around it. They have 2 diodes on them as well.
Now, when williams came up with advertising "parallel wound" coils, they might have referred to the coils having both the primary and hold coils being wound in parallel at the core, vs. having all of the flip coil
then the hold coil windings within each other - this would help with
heat dissipation I'd think.
On 2020/12/29 7:12 a.m., LexingtonVAPin wrote:
On 12/29/20 7:31 AM, cfhatprovidedotnet wrote:
easiest way is to look at the diode. if there's two diodes,
it's parallel wound. if there's one diode, it's serial wound.
All EM flipper coils (no diode) that i have ever encountered
are serial wound.
On Monday, December 28, 2020 at 6:34:18 PM UTC-5, LexingtonVAPin wrote: >>>> Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like
23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire
2600 turns.
Since they are two different diameter wires, aren't they parallel?
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams Sys >>>> 6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the hold >>>> coil on the outside?
Serial are wound from one end to the other with a tap part way through? >>>>
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping both >>>> the hold and power energized. Both fields collapse simultaneously, so
only one diode needed.
--
http://orcalcoast.com/
That is what I always thought too.
In looking at how these coils are wired, in one setup, the EOS switch
shorts out the hold coil. When it opens up, both the power and hold
coils are connected. When the flipper switch is released, both
windings collapse at the same time, so only one diode - across both -
is needed.
In the newer setup, the EOS switch is connected in series with the
power coil. On the flip, both power and hold coils are initially
powered.
When the EOS opens, the power coil is disconnected and a diode is
required for the back EMF.
The hold coil stays powered. When the flipper switch is released, the
separate diode is required for the hold coil.
I am looking at two coils: 11630 and 25-500/34-4500. The obvious
difference between the two is that the 11630 is wired with both coils
to the left lug (viewed from the plunger side), power to the center
and hold to the right.
With the other coil, two wires go to the center. Power to the left
and hold to the right. Both coils have two diodes.
The 25-500/34-4500 is used in a Bally could be a parallel coil, but
they never used a cap on the EOS or flipper switch (that I am aware of).
I looked at a Gorgar. Williams supposedly used serial coils. It is a
19-400/30-750. It looks exactly like the 25-500/34-4500 in that the
power connections are left/center and the hold is center/right. A
single diode is on it. It is wired just like the early Bally, with
the EOS shorting out the hold coil.
What makes a coil serial vs parallel?
https://flic.kr/p/2kmRDZk
https://flic.kr/p/2kmR5eZ
The advantage a parallel wound coil has over serial is the game applies current to both windings at the same time - so both act on the plunger giving you a bit more power for the same size windings.
An easy way you tell if you have a parallel coil is there are two wires
to an outside lug - the same lug that two diodes terminate. This is the common for the parallel coils...
A serial coil has the lug with two windings attached as the middle lug.
John :-#)#
On 12/29/20 12:40 PM, John Robertson wrote:
On 2020/12/29 7:12 a.m., LexingtonVAPin wrote:Thanks John. I posted before I saw your reply.
On 12/29/20 7:31 AM, cfhatprovidedotnet wrote:
easiest way is to look at the diode. if there's two diodes,
it's parallel wound. if there's one diode, it's serial wound.
All EM flipper coils (no diode) that i have ever encountered
are serial wound.
On Monday, December 28, 2020 at 6:34:18 PM UTC-5, LexingtonVAPin wrote: >>>>> Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like
23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire >>>>> 2600 turns.
Since they are two different diameter wires, aren't they parallel?
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams Sys >>>>> 6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the >>>>> hold
coil on the outside?
Serial are wound from one end to the other with a tap part way
through?
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping both >>>>> the hold and power energized. Both fields collapse simultaneously, so >>>>> only one diode needed.
--
http://orcalcoast.com/
That is what I always thought too.
In looking at how these coils are wired, in one setup, the EOS switch
shorts out the hold coil. When it opens up, both the power and hold
coils are connected. When the flipper switch is released, both >>> windings collapse at the same time, so only one diode - across both -
is needed.
In the newer setup, the EOS switch is connected in series with the
power coil. On the flip, both power and hold coils are initially
powered.
When the EOS opens, the power coil is disconnected and a diode is
required for the back EMF.
The hold coil stays powered. When the flipper switch is released, the
separate diode is required for the hold coil.
I am looking at two coils: 11630 and 25-500/34-4500. The obvious
difference between the two is that the 11630 is wired with both coils
to the left lug (viewed from the plunger side), power to the center
and hold to the right.
With the other coil, two wires go to the center. Power to the left
and hold to the right. Both coils have two diodes.
The 25-500/34-4500 is used in a Bally could be a parallel coil, but
they never used a cap on the EOS or flipper switch (that I am aware of). >>>
I looked at a Gorgar. Williams supposedly used serial coils. It is
a 19-400/30-750. It looks exactly like the 25-500/34-4500 in that
the power connections are left/center and the hold is center/right. >>> A single diode is on it. It is wired just like the early Bally, with
the EOS shorting out the hold coil.
What makes a coil serial vs parallel?
https://flic.kr/p/2kmRDZk
https://flic.kr/p/2kmR5eZ
The advantage a parallel wound coil has over serial is the game
applies current to both windings at the same time - so both act on the
plunger giving you a bit more power for the same size windings.
An easy way you tell if you have a parallel coil is there are two
wires to an outside lug - the same lug that two diodes terminate. This
is the common for the parallel coils...
A serial coil has the lug with two windings attached as the middle lug.
John :-#)#
If that is true, then the early Bally coils are serial, not parallel.
But Scott unwound a Bally coil and found it to be parallel.
[I am still not certain what physically determines parallel vs. serial.
I don't have handy old coils to unwind them - I recycled them.]
What keeps a serial coil from being wired to an EOS switch so that 'both windings are on at the same time'? Will the magnetic fields of the two windings work against each other?
On 2020/12/29 10:25 a.m., LexingtonVAPin wrote:
On 12/29/20 12:40 PM, John Robertson wrote:
On 2020/12/29 7:12 a.m., LexingtonVAPin wrote:Thanks John. I posted before I saw your reply.
On 12/29/20 7:31 AM, cfhatprovidedotnet wrote:
easiest way is to look at the diode. if there's two diodes,
it's parallel wound. if there's one diode, it's serial wound.
All EM flipper coils (no diode) that i have ever encountered
are serial wound.
On Monday, December 28, 2020 at 6:34:18 PM UTC-5, LexingtonVAPin
wrote:
Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like
23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire >>>>>> 2600 turns.
Since they are two different diameter wires, aren't they parallel? >>>>>>
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams >>>>>> Sys
6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the >>>>>> hold
coil on the outside?
Serial are wound from one end to the other with a tap part way
through?
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping >>>>>> both
the hold and power energized. Both fields collapse simultaneously, so >>>>>> only one diode needed.
--
http://orcalcoast.com/
That is what I always thought too.
In looking at how these coils are wired, in one setup, the EOS
switch shorts out the hold coil. When it opens up, both the power
and hold coils are connected. When the flipper switch is released,
both windings collapse at the same time, so only one diode - across
both - is needed.
In the newer setup, the EOS switch is connected in series with the
power coil. On the flip, both power and hold coils are initially
powered.
When the EOS opens, the power coil is disconnected and a diode is
required for the back EMF.
The hold coil stays powered. When the flipper switch is released,
the separate diode is required for the hold coil.
I am looking at two coils: 11630 and 25-500/34-4500. The obvious
difference between the two is that the 11630 is wired with both
coils to the left lug (viewed from the plunger side), power to the
center and hold to the right.
With the other coil, two wires go to the center. Power to the left
and hold to the right. Both coils have two diodes.
The 25-500/34-4500 is used in a Bally could be a parallel coil, but
they never used a cap on the EOS or flipper switch (that I am aware
of).
I looked at a Gorgar. Williams supposedly used serial coils. It is >>>> a 19-400/30-750. It looks exactly like the 25-500/34-4500 in that
the power connections are left/center and the hold is center/right.
A single diode is on it. It is wired just like the early Bally,
with the EOS shorting out the hold coil.
What makes a coil serial vs parallel?
https://flic.kr/p/2kmRDZk
https://flic.kr/p/2kmR5eZ
The advantage a parallel wound coil has over serial is the game
applies current to both windings at the same time - so both act on
the plunger giving you a bit more power for the same size windings.
An easy way you tell if you have a parallel coil is there are two
wires to an outside lug - the same lug that two diodes terminate.
This is the common for the parallel coils...
A serial coil has the lug with two windings attached as the middle lug.
John :-#)#
If that is true, then the early Bally coils are serial, not parallel.
But Scott unwound a Bally coil and found it to be parallel.
[I am still not certain what physically determines parallel vs.
serial. I don't have handy old coils to unwind them - I recycled them.] >>
What keeps a serial coil from being wired to an EOS switch so that
'both windings are on at the same time'? Will the magnetic fields of
the two windings work against each other?
Parallel means just that - the two fields work together in parallel as
long as they are wound in the same direction.
John:-#)#
On 12/29/20 1:44 PM, John Robertson wrote:
On 2020/12/29 10:25 a.m., LexingtonVAPin wrote:
On 12/29/20 12:40 PM, John Robertson wrote:
On 2020/12/29 7:12 a.m., LexingtonVAPin wrote:Thanks John. I posted before I saw your reply.
On 12/29/20 7:31 AM, cfhatprovidedotnet wrote:
easiest way is to look at the diode. if there's two diodes,
it's parallel wound. if there's one diode, it's serial wound.
All EM flipper coils (no diode) that i have ever encountered
are serial wound.
On Monday, December 28, 2020 at 6:34:18 PM UTC-5, LexingtonVAPin
wrote:
Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ
I am trying to figure out how to tell whether a coil is serial or>>>>>>> parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like
23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire >>>>>>> 2600 turns.
Since they are two different diameter wires, aren't they parallel? >>>>>>>
One person said that if there are four different wires, they are >>>>>>> parallel. Aren't there always four wires, even if serial?
Williams Sys
6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and
the hold
coil on the outside?
Serial are wound from one end to the other with a tap part way
through?
The only thing I can tell is that later pins disconnect the power>>>>>>> winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping >>>>>>> both
the hold and power energized. Both fields collapse
simultaneously, so
only one diode needed.
--
http://orcalcoast.com/
That is what I always thought too.
In looking at how these coils are wired, in one setup, the EOS
switch shorts out the hold coil. When it opens up, both the power >>>>> and hold coils are connected. When the flipper switch is released, >>>>> both windings collapse at the same time, so only one diode - across >>>>> both - is needed.
In the newer setup, the EOS switch is connected in series with the >>>>> power coil. On the flip, both power and hold coils are initially
powered.
When the EOS opens, the power coil is disconnected and a diode is
required for the back EMF.
The hold coil stays powered. When the flipper switch is released,
the separate diode is required for the hold coil.
I am looking at two coils: 11630 and 25-500/34-4500. The obvious
difference between the two is that the 11630 is wired with both
coils to the left lug (viewed from the plunger side), power to the >>>>> center and hold to the right.
With the other coil, two wires go to the center. Power to the left >>>>> and hold to the right. Both coils have two diodes.
The 25-500/34-4500 is used in a Bally could be a parallel coil, but >>>>> they never used a cap on the EOS or flipper switch (that I am aware >>>>> of).
I looked at a Gorgar. Williams supposedly used serial coils. It >>>>> is a 19-400/30-750. It looks exactly like the 25-500/34-4500 in
that the power connections are left/center and the hold is
center/right. A single diode is on it. It is wired just like the
early Bally, with the EOS shorting out the hold coil.
What makes a coil serial vs parallel?
https://flic.kr/p/2kmRDZk
https://flic.kr/p/2kmR5eZ
The advantage a parallel wound coil has over serial is the game
applies current to both windings at the same time - so both act on
the plunger giving you a bit more power for the same size windings.
An easy way you tell if you have a parallel coil is there are two
wires to an outside lug - the same lug that two diodes terminate.
This is the common for the parallel coils...
A serial coil has the lug with two windings attached as the middle lug. >>>>
John :-#)#
If that is true, then the early Bally coils are serial, not parallel.
But Scott unwound a Bally coil and found it to be parallel.
[I am still not certain what physically determines parallel vs.
serial. I don't have handy old coils to unwind them - I recycled
them.]
What keeps a serial coil from being wired to an EOS switch so that
'both windings are on at the same time'? Will the magnetic fields
of the two windings work against each other?
Parallel means just that - the two fields work together in parallel as
long as they are wound in the same direction.
John:-#)#
That makes sense. So if they were both on at the same time, they would
not work together if they are serial. The magnetic field would be weakened.
How can one tell when unwinding it? Would they be wound in opposite directions? What physically determines if the two coils magnetic fields would be additive?
On 2020/12/29 10:56 a.m., LexingtonVAPin wrote:
On 12/29/20 1:44 PM, John Robertson wrote:
On 2020/12/29 10:25 a.m., LexingtonVAPin wrote:
On 12/29/20 12:40 PM, John Robertson wrote:
On 2020/12/29 7:12 a.m., LexingtonVAPin wrote:Thanks John. I posted before I saw your reply.
On 12/29/20 7:31 AM, cfhatprovidedotnet wrote:
easiest way is to look at the diode. if there's two diodes,
it's parallel wound. if there's one diode, it's serial wound.
All EM flipper coils (no diode) that i have ever encountered
are serial wound.
On Monday, December 28, 2020 at 6:34:18 PM UTC-5, LexingtonVAPin >>>>>>> wrote:
Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ
I am trying to figure out how to tell whether a coil is serial or >>>>>>>> parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like >>>>>>>> 23/600-30/2600. That would indicate #23 wire 600 turns, and #30 >>>>>>>> wire
2600 turns.
Since they are two different diameter wires, aren't they parallel? >>>>>>>>
One person said that if there are four different wires, they are >>>>>>>> parallel. Aren't there always four wires, even if serial?
Williams Sys
6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and >>>>>>>> the hold
coil on the outside?
Serial are wound from one end to the other with a tap part way >>>>>>>> through?
The only thing I can tell is that later pins disconnect the power >>>>>>>> winding (hence the two diodes).
The earlier ones short out the hold winding, then opens -
keeping both
the hold and power energized. Both fields collapse
simultaneously, so
only one diode needed.
--
http://orcalcoast.com/
That is what I always thought too.
In looking at how these coils are wired, in one setup, the EOS
switch shorts out the hold coil. When it opens up, both the power >>>>>> and hold coils are connected. When the flipper switch is
released, both windings collapse at the same time, so only one
diode - across both - is needed.
In the newer setup, the EOS switch is connected in series with the >>>>>> power coil. On the flip, both power and hold coils are initially >>>>>> powered.
When the EOS opens, the power coil is disconnected and a diode is >>>>>> required for the back EMF.
The hold coil stays powered. When the flipper switch is released, >>>>>> the separate diode is required for the hold coil.
I am looking at two coils: 11630 and 25-500/34-4500. The obvious >>>>>> difference between the two is that the 11630 is wired with both
coils to the left lug (viewed from the plunger side), power to the >>>>>> center and hold to the right.
With the other coil, two wires go to the center. Power to the
left and hold to the right. Both coils have two diodes.
The 25-500/34-4500 is used in a Bally could be a parallel coil,
but they never used a cap on the EOS or flipper switch (that I am >>>>>> aware of).
I looked at a Gorgar. Williams supposedly used serial coils. It >>>>>> is a 19-400/30-750. It looks exactly like the 25-500/34-4500 in >>>>>> that the power connections are left/center and the hold is
center/right. A single diode is on it. It is wired just like the >>>>>> early Bally, with the EOS shorting out the hold coil.
What makes a coil serial vs parallel?
https://flic.kr/p/2kmRDZk
https://flic.kr/p/2kmR5eZ
The advantage a parallel wound coil has over serial is the game
applies current to both windings at the same time - so both act on
the plunger giving you a bit more power for the same size windings.
An easy way you tell if you have a parallel coil is there are two
wires to an outside lug - the same lug that two diodes terminate.
This is the common for the parallel coils...
A serial coil has the lug with two windings attached as the middle
lug.
John :-#)#
If that is true, then the early Bally coils are serial, not
parallel. But Scott unwound a Bally coil and found it to be parallel.
[I am still not certain what physically determines parallel vs.
serial. I don't have handy old coils to unwind them - I recycled
them.]
What keeps a serial coil from being wired to an EOS switch so that
'both windings are on at the same time'? Will the magnetic fields >>>> of the two windings work against each other?
Parallel means just that - the two fields work together in parallel
as long as they are wound in the same direction.
John:-#)#
That makes sense. So if they were both on at the same time, they
would not work together if they are serial. The magnetic field would
be weakened.
How can one tell when unwinding it? Would they be wound in opposite
directions? What physically determines if the two coils magnetic
fields would be additive?
It took electronic flipper control to be additive and thus parallel wound.
The whole series/parallel is a bit of a trick. You still have in essence
one large continuous run of wire with a connection.
You could wire the coil with the Power at the centre terminal on older
coils and have the EOS open the power winding and the hold winding would always be on when the button is pressed. Might work out to slightly more power - or not. All coils are wound the same direction, so the windings
are parallel...
Series coil
----/\/\/\---|---/\/\/\-|---
|----||----| (EOS)
Parallel coil
----|----/\/\/\---||-|--- (EOS or transistor)
|----/\/\/\------|
That's as good as my ASCII drawing gets...the left connection is the
power (or ground through the flipper switch) and the right lead is
ground through the flipper switch (or power). No diodes 'cause I'm lazy...
Clear?
John :-#)#
That is what I imagined the construction parallel coils. Not certain
what the construction is for serial.
Also not certain why two diodes are used on early Bally if the power and hold windings lose power at the same time. And why not add caps if the Bally is truly parallel.
Also not certain why two diodes are used on early Bally if the power
and hold windings lose power at the same time. And why not add caps
if the Bally is truly parallel.
2 coils collapsing in 2 different endpoints=needs 2 diodes to block
voltage I would assume.
Revisiting this old thread: https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like 23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire 2600 turns.
Since they are two different diameter wires, aren't they parallel?
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams Sys
6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the hold
coil on the outside?
Serial are wound from one end to the other with a tap part way through?
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping both
the hold and power energized. Both fields collapse simultaneously, so
only one diode needed.
On 12/28/20 6:34 PM, LexingtonVAPin wrote:
Revisiting this old thread:
https://groups.google.com/g/rec.games.pinball/c/7w_ylCWpvHo/m/sPUKBGMuEAAJ >>
I am trying to figure out how to tell whether a coil is serial or
parallel (without unwinding it).
Early flipper coils had part numbers that were descriptive like
23/600-30/2600. That would indicate #23 wire 600 turns, and #30 wire
2600 turns.
Since they are two different diameter wires, aren't they parallel?
One person said that if there are four different wires, they are
parallel. Aren't there always four wires, even if serial? Williams
Sys 6 Firepower looks like two different diameter wires.
Are parallel coils wound with the power coil on the inside and the
hold coil on the outside?
Serial are wound from one end to the other with a tap part way through?
The only thing I can tell is that later pins disconnect the power
winding (hence the two diodes).
The earlier ones short out the hold winding, then opens - keeping both
the hold and power energized. Both fields collapse simultaneously, so
only one diode needed.
I have been converting an EBD to WPC style flippers. I did this because
I am moving the relatively new linear flippers to a Kings of Steel. And because I wanted to try doing this.
I don't know if this helps at all but:
Linear flippers - no cap on EOS:
https://youtu.be/78VVc8Vqz-E
WPC style flippers with caps:
https://youtu.be/Q-JN2tVaM0Y
This is the linear upper flipper in EBD. No cap:
https://youtu.be/OuXGx-AH9w4
I added a cap to the existing linear flipper:
https://youtu.be/aID5tXysjUg
This is the same linear flipper, no cap, slow motion:
https://youtu.be/Mj49Eu_dZEk
The same linear flipper, with cap, slow motion. At first, no arcing.
Then after a few flips, arcing occurs:
https://youtu.be/GjwnfehkE8g
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