RE: Eletronic engine syncronizer **SUPPORT **

RE: Eletronic engine syncronizer **SUPPORT **
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All Forums >> RC Airplanes >> Twin & Multi Engine RC Aircraft >> RE: Eletronic engine syncronizer **SUPPORT **

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RE: Eletronic engine syncronizer **SUPPORT ** - 9/11/2006 7:46:23 AM

a1pcfixer

Posts: 284
Joined: 8/20/2004
From: La Porte, IN, USA
Status: offline

quote:

ORIGINAL: yl5295

Responses:

Glow plug wires are connected the following way:
RED: Glow battery + terminal
ORANGE: Glow plug positive terminal (tip)
Black/Brown: Battery - terminal and Engine case/ground

Might be good to update future manuals with that info.

quote:

ORIGINAL: yl5295
Sync point and end points:

So here is how you reset the position 5 programming:
...........................

Let me know if you need more help.

I'll try to squeeze some time in during this week, and re-work my throttle linkages.
Thank-you for your help!

_____________________________

Jim L.
Learn from the mistakes of others.You won't live long enough to make all of them yourself. ClubSaito Member#445

(in reply to yl5295)

Post #: 26

RE: Eletronic engine syncronizer **SUPPORT ** - 9/13/2006 8:06:08 AM

a1pcfixer

Posts: 284
Joined: 8/20/2004
From: La Porte, IN, USA
Status: offline

quote:

ORIGINAL: yl5295

The second picture is the optional LED display. Some of you wanted an RPM readout and to be able to have all LEDs remotely mounted. So here it is. $35 + $5 shipping. You have to return your unit to have sw and one hardware change added to support it. It connects to the two pin connector on the TwinSync.

My TwinSync already has the connector for the display (next to the Red LED), and has the newer sw ver. 1.2.0. Would I still need to send mine back to you for mod's to use this remote display?

Reason I ask, is that RC Showcase now lists these displays.

_____________________________

Jim L.
Learn from the mistakes of others.You won't live long enough to make all of them yourself. ClubSaito Member#445

(in reply to yl5295)

Post #: 27

RE: Eletronic engine syncronizer **SUPPORT ** - 9/13/2006 12:15:16 PM

yl5295

Posts: 462
Joined: 7/29/2003
From: Raleigh, NC
Status: offline

No units have shipped yet enabled for the display (except one prototype in the field for testing). All units shipping after now will be display enabled. So yes even with the newer software you need to send the unit back to me because it needs a wiring change and a different software load to support the display.

The two pin connector on all Twinsyncs shipped before now are so that you can wire a remote led to indicate glow plug status (i.e. not to run the display).

(in reply to a1pcfixer)

Post #: 28

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 1:32:53 AM

7capCub

Posts: 13
Joined: 1/3/2006
From: Chelmsford, MA, USA
Status: offline

Hi Bill,

I received the TWIN SYNC a few days ago. Nice fast shipping. Thanks.

Will the TWIN SYNC work if I'm using a five cell pack. I've not tried it yet, and didn't want to connect it unless I knew for sure it would be O.K.. What is the Vcc ABS MAX of the pic?

Also I could measure this but I was wondering how much current the syncronizer consumes.

I'm having some problems with interference and am in the process of debugging this problem. I've changed the receiver and a new (same ch.) crystal, but no luck so far. Still more work to do. I'm setting this up on a Seagull Dual Ace.

Thanks, Erik

(in reply to yl5295)

Post #: 29

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 4:05:23 AM

yl5295

Posts: 462
Joined: 7/29/2003
From: Raleigh, NC
Status: offline

Voltage is no issue... it will handle up to about 20Volts.

Let's stay in contact on the interference issue because I have seen problems on magneto equiped gas engines with rubber spark boots but never a problem on glow. Do you have a metal push rod connection to a metal throttle arm on the carb? Are you using the onboard glow? If so could vibration be causing a metal to metal contact vibration?

I am increasing the filtering on the device but almost all interfernce problems observed so far with > 50 units in the field have been due to sensor wires being attached to conductive mounts with the engines - a no-no - or with ignition engines. Regardless I think I about have this solved but most test people solved it without my involvement.

This will be the first report of glow interference.

Bill

(in reply to 7capCub)

Post #: 30

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 7:52:02 AM

a1pcfixer

Posts: 284
Joined: 8/20/2004
From: La Porte, IN, USA
Status: offline

quote:

ORIGINAL: 7capCub

Also I could measure this but I was wondering how much current the syncronizer consumes.

I'm having some problems with interference and am in the process of debugging this problem.

Erik

Interference.....as in strange glitching of your throttle &/or rudder servo's???

Mine did that when I had the throttle end points less than 100% each way on my transmitter.
Very odd, as NOTHING was connected from TwinSync to my Rudder channel!
Modified my throttle linkages so I have 125% E.P.'s and so far - so good!

Friday/today I test run the engines with the TwinSync & do both range checks.
Then if all's well, Saturday will be the first airborne test!

_____________________________

Jim L.
Learn from the mistakes of others.You won't live long enough to make all of them yourself. ClubSaito Member#445

(in reply to 7capCub)

Post #: 31

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 2:46:44 PM

yl5295

Posts: 462
Joined: 7/29/2003
From: Raleigh, NC
Status: offline

As for power consumption of the device it really depends on how many LEDs are on - on average over time. The device pulls about 10ma with no LEDs lit. Each LED draws about 15ma. There are 5 leds (optional 6th for glow plug status). That means with all LEDS on total power consumption is still less than 100ma.

As for observed interference. The gas engine guys have seen erratic throttle servo movement when they were getting interference from the spark plug. This was limited only to the TwinSync and not in servos connected directly to the receiver. In some cases, it reduced the PCM lockout range of the twinsync (not the receiver) from about 75 yards to about 50 yards.

PS The reason you can run the Twinsync on any voltage is that it has on board regulation - i.e. not powered directly from the battery. This also helps isolate noise so that it doesn't get back to the receiver.

(in reply to a1pcfixer)

Post #: 32

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 2:48:13 PM

drifter

Posts: 299
Joined: 9/26/2002
From: Baltimore, MD, USA
Status: offline

Bill,
Is there a LOW voltage limit for the TwinSync? I ask because while setting up a unit on my P-38 the battery voltage dropped. The servos kept responding slowly, but the TwinSync stopped accepting programming changes. All was well after charging the battery.

Drifter

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Post #: 33

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 2:57:43 PM

7capCub

Posts: 13
Joined: 1/3/2006
From: Chelmsford, MA, USA
Status: offline

Hi Bill and a1pcfixer, thanks for the quick response.

Interesting, I'm using aluminum stock 1/2" x 1/8" for the sensor mounts which are bolted to the engine. Sounds like I should change this first. The interference seems to be the worst when both engines are running.

Good news on the 4 vs 5 cell packs, I prefer 5 cells.

I use cable for the throttle with a nylon socket and metal ball on the carb connection.

I don't have batteries connected to the glow portion of the twin sync yet.

The radio is a Futaba 7CAP. I've set the end point throws in the radio for 125% and the cable to horn servo connection is very close to the center to compensate.

I would like to use the 3 position switch as CH7 to control the AUX but I'm not sure how to assign that "G" switch to CH7 in the transmitter. Any help would be appreciated.

Thanks, Erik

(in reply to yl5295)

Post #: 34

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 3:37:20 PM

yl5295

Posts: 462
Joined: 7/29/2003
From: Raleigh, NC
Status: offline

Low voltage limit on the twinsync is 3.8V for normal operation and the device shuts off at about 3.5V.

Do not use conductive sensor mounts (if so do not attach them to the engine) - double no-no

The rest of your install sounds fine.

I don't have a Futaba 7CAP. On a 9CAP it is the AUX-CH memu you use to program switches to channels. (that's a Futaba question not a TwinSync question)

(in reply to 7capCub)

Post #: 35

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 8:01:22 PM

a1pcfixer

Posts: 284
Joined: 8/20/2004
From: La Porte, IN, USA
Status: offline

quote:

ORIGINAL: yl5295

I don't have a Futaba 7CAP. On a 9CAP it is the AUX-CH memu you use to program switches to channels. (that's a Futaba question not a TwinSync question)

Hey Erik,

Two demerits for you, and you get to stay after class to clean all the erasers & blackboards!

_____________________________

Jim L.
Learn from the mistakes of others.You won't live long enough to make all of them yourself. ClubSaito Member#445

(in reply to yl5295)

Post #: 36

RE: Eletronic engine syncronizer **SUPPORT ** - 9/15/2006 8:07:56 PM

a1pcfixer

Posts: 284
Joined: 8/20/2004
From: La Porte, IN, USA
Status: offline

quote:

ORIGINAL: 7capCub

Hi Bill and a1pcfixer, thanks for the quick response.

The radio is a Futaba 7CAP.
I would like to use the 3 position switch as CH7 to control the AUX but I'm not sure how to assign that "G" switch to CH7 in the transmitter. Any help would be appreciated.

Thanks, Erik

Ch7??? Don't you mean ch5? as in L.G. (gear).

Futaba FAQ's

7C Radio System FAQ

_____________________________

Jim L.
Learn from the mistakes of others.You won't live long enough to make all of them yourself. ClubSaito Member#445

(in reply to 7capCub)

Post #: 37

RE: Eletronic engine syncronizer **SUPPORT ** - 9/16/2006 2:40:32 AM

7capCub

Posts: 13
Joined: 1/3/2006
From: Chelmsford, MA, USA
Status: offline

Thanks a1pcfixer, I actually found what I was looking for in the menu.... Just not intuitive. Thanks for the links though.

I made up new sensor mounts using 5-ply and the major interference seems to be gone. However, maybe a low battery has confused the twin sync. I need to go through each menu to confirm that each setting is what I expect. The first symptom is the responce time, both engines hunt for sync. They oscillate around the target and eventually get confused enough that one engine will quit.

I need more time to work on this. I've experimented with faster and slower loop speeds, but ended up putting it back to the default.

Thanks for the good support.

More to come, Erik

(in reply to a1pcfixer)

Post #: 38