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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Throttle Jockey Pro Woes.
04-20-2009 07:12 PM  9 years agoPost 1
scouse

rrApprentice

UK Liverpool

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I am just having no luck whatsoever trying to get the TJPro to engage while using my RD8000 on a Raptor 50V2.

I have scoured the net and see that quite a lot of people have problems where others just seem to breeze through no worries.

It only sort of engages when I drop the epa in channel 7 down to about 30 but the throttle sort of pulses most of the time.

I calibrate it by having the throttle epa's at 100 both ways channel 7 epa 100 both ways then adjust my throttle curve to trim all way down low 0 mid 50 high 100.(the low point raises as I raise the trim so its on about 16% to tick over)

The red light is always on when the engine is running and the sensor is about .5mm away from the magnet.

Throttle curve after calibration is about 16 40 90.

I have tried raising the throttle in hover but it has engaged properly once or twice but the headspeed was over 2000rpm and I could get it engaged lower down.

I have been away from flying for about 3-4 years and was a beginner at best, this is really annoying me and I am thinking of slinging it and getting a revlock!

Anyone had success with the RD8000 and TJPro?

If so PLEASE HELP!!!!!

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04-20-2009 08:24 PM  9 years agoPost 2
JuanRodriguez

rrProfessor

The Villages, Florida

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I'm not familiar with the RD8000 but if you're using the MA RPM calculator found on their website (or paperwork) for your initial settings that may be causing you grief... We've found that the calculator is way off.....

Keep the following in mind, maybe it will help, maybe not.....

Forgetting the TJP for a moment, you really need to set up some decent pitch and throttle curves.......if for no other reason, in the event you have a failure with the TJP.....Then, for the TJP to engage properly, your initial ACTUAL headspeed has to be AT LEAST OR HIGHER than your TARGET headspeed......otherwise, the TJP won't engage properly or it may not engage at all.....

So, if you want the TJP to maintain 1900 RPM, for example, your actual headspeed prior to you flipping the switch to engage the TJP should be 1900 or above...... I like to set mine up so that my headspeed is a few hundred RPM higher than the governed speed so that when I switch in, I can hear the RPM drop to my target headspeed.....So, adjust your throttle curve to give you this relationship......

Regarding your numbers...... an ATV of 30 is WAY, WAY too low !!! You should start at about 50 or 55 and work your way up from there until two things happen....... #1-- Until your TJP positively engages.....and then #2-- adjust that ATV for the RPM's you desire from there...

Hope all of this is not too confusing and that it helps you out.

Let us know.

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04-20-2009 10:58 PM  9 years agoPost 3
scouse

rrApprentice

UK Liverpool

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Thanks for the info I am going to have another look at it tomorrow.

I used the new calculators on the MA web site, the one that you open in excel and input all the data.

I will let you know how I get on.

Thanks

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04-20-2009 11:30 PM  9 years agoPost 4
JuanRodriguez

rrProfessor

The Villages, Florida

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Yes,
Please let me know....

I don't know if the calculator on their site is "new" or not , but the one that we attempted to use when the product first appeared on the market was way off.....

I would disregard that calculator for now and try the suggestions I outlined above..... you've got nothing to loose !!

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04-22-2009 06:37 AM  9 years agoPost 5
baby_zyklon

rrElite Veteran

Singapore

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The excel one didn't work for me either, but I haven't used an airtronics before.

You need to ensure that you have the tj pro properly calibrated before it will ever work. A TJ pro will pulse if
1. The governor gain is set too low, i.e. you are asking for too low a headspeed
or
2. Calibration is off.

Proper calibration is when you have the set the governor to run, pushing the throttle point value to ard 25% and below it makes the green/orange led goes off. The led comes on above 25%.

When the governor is set to not engage, pushing the throttle above or below 25% should not have the led coming on.

And most importantly...the governor gain % that you set on your tx to turn the governor off/on is always around the same value even for repeated calibration...

That is when the governor is properly calibrated and should engage when headspeed is high enough.

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04-27-2009 04:38 PM  9 years agoPost 6
scouse

rrApprentice

UK Liverpool

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I havent ignored any of your comments I just havent had a chance to give it another go yet, will update whether its a positive or negative result.

Thanks

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04-30-2009 12:47 AM  9 years agoPost 7
Rcarnes

rrApprentice

mustang, ok. USA

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or you could go with an ATG and have tru-easy setup with solid performance.

R. C.
I dream of the day when a chicken can cross the road without his motives being questioned.

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04-30-2009 02:25 AM  9 years agoPost 8
TMoore

rrMaster

Cookeville, TN

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I run RevMax's on these radios all the time so it's not a radio issue.

Make sure the throttle EPA is set as close to 100 as you can get, a little under or over is OK. Set the throttle trim to full low, set the AUX channel to low side -100 and high side +100, put the TJ into cal mode, run the throttle stick up and down, toggle the aux switch and calibration is done.

Set one side of the AUX switch to 0 and the other side to 80. This will get you close to an rpm you can live with. Fine tune from there.

TM

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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04-30-2009 11:03 PM  9 years agoPost 9
scouse

rrApprentice

UK Liverpool

My Posts: All  Forum  Topic

Could I set the hover pitch to 0 degrees so I can get the head up to speed before engaging the TJ? I know it may over rev but I would lower the throttle curve to compensate, its only so I can get the head speed on the tach to approx 1900 rpm and mess about with the EPA on the TJ channel without having to worry about it taking off!

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05-01-2009 12:34 AM  9 years agoPost 10
TMoore

rrMaster

Cookeville, TN

My Posts: All  Forum  Topic

Could I set the hover pitch to 0 degrees so I can get the head up to speed before engaging the TJ? I know it may over rev but I would lower the throttle curve to compensate, its only so I can get the head speed on the tach to approx 1900 rpm and mess about with the EPA on the TJ channel without having to worry about it taking off!
Why would you do that?

Just set a curve like normal and run the headspeed to where you want it, flip the aux switch and engage the TJ and at that point it is in control and ignoring your throttle settings anyway. Once it is engaged, the TJ controls the throttle based on your AUX gain.

TM

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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05-01-2009 05:05 AM  9 years agoPost 11
Divot

rrVeteran

Mesa, AZ

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Did you set it for the correct servo?

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05-01-2009 05:46 AM  9 years agoPost 12
Paul Woodcock

rrElite Veteran

Dubai - United Arab Emirates

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Hi

In your first post you said you calibrated with 0,50,100 etc and then said your throttle curve ended at 16 40 90.

This could be the issue. You need to setup your throttle linkage to need 0, 50, 100 or close to that and then re calibrate and fly with the settings at calibration.

These are really quite simple things. Also if the motor is too rich and the rpm never gets close to the required governed rpm it will not engage.

Hope this helps.

Regards
Paul

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