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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › TJ PRO calibration and setup (simple question)
02-09-2006 08:48 PM  12 years agoPost 1
sir777

rrApprentice

Moscow, Russia + Lloret de Mar (Girona), Spain

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Hi, guys! I am sorry to ask this question, but I'm a bit confused. First of all, I've bought a TJ PRO governer for my evo50 with 50 hyper. My radio is Sanwa Rd8000 with 8-channel PPM Sanwa receiver. And my throttle servo is Futaba 9253. My question is, actually questions:
I do everything as written in the instructions to the governer. Throttle servo EPA's are 100 both sides, at middle stick (50% of thottle on the throttle curve) I have 90 degrees everywhere with 50% carb opened, aux channel EPA are 100 also both sides. Before I used to have just a normal throttle curve, let's say, 10% (at this me engine idles), 25%, 40%, 55%, 80% (I hover at 3\4 stick). And throttle trimmer was in the center all the time (only sometimes in the cold weather I used to bump my idle speed a bit). Now the question is: How do I do the calibration of this governer? I mean, with the curve which is 0% 50% 100%? Can I do it with throttle trimmer in the center, because I already have 0% in the bottom point of the curve? Because in the instructions there is nothing said with which throttle curve I should calibrate it? And I can't understand why should I put the throttle trimmer all the way down, if I already have my carb completely closed (in case, I have 0% 50% 100% throtlle curve). Thank you for reading my post. I am sorry again, because I may have written some things, which are very simple, but I can't get them.

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02-09-2006 09:19 PM  12 years agoPost 2
Grant H

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Madison, WI

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Can I do it with throttle trimmer in the center, because I already have 0% in the bottom point of the curve?
I dont think it is going to matter.

Give it a shot and let us know how it goes or what happens..

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02-09-2006 09:19 PM  12 years agoPost 3
JuanRodriguez

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The Villages, Florida

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The answer is quite simple....

Calibrate with your curve 0-25-50-75-100...... In other words, linear.

Calibrate with your trimm ALL THE WAY down..... Even though your curve is already set to zero, if you move your trimmer off zero, the TJ will "see" that movement and your throttle barrel will open with any adjustment of the trimmer.

The object during calibrations is that the TJ sees the straight line from zero to 100 and the trimmer set to zero aids the TJ to properly callibrate the "on" point, which is at 25 or quarter stick

Once the TJ is calibrated, then you can re-adjust your throttle curves to suit so that you can operate the machine with or without the TJ engaged.....

Also, even though you didn't ask, your actual headspeed must be AT LEAST as high or higher than your anticipated "target" headspeed.... If your headspeed is lower than the target, the TJ wont activate.....

This last statement has nothing to do with calibration......

And forget about using the "calculator" you may have found on the website. It is useless and will not work most of the time....

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02-09-2006 09:37 PM  12 years agoPost 4
sir777

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Moscow, Russia + Lloret de Mar (Girona), Spain

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Thank you for quick answers! But still I have question: If I first set the linear curve (0 25 50 75 100), while the trimmer is in the center and only after put the trimmer all the way down, then I will end with -13% in the bottom of the throttle curve. That is what confuses me. I thought about following steps for calibration:
BEFORE CALIBRATION:
1) make sure, that Throttle servo EPA's are 100 both sides with full carb openings, at middle stick (50% of thottle on the throttle curve) I have 90 degrees everywhere with 50% carb opened, aux channel EPA are 100 also both sides.
2) That's the question-
a)put the trimmer all the way down after setting the curve (0 25 50 75 100) and having -13 in the bottom end of the throttle curve?
b) OR setting the trimmer all the way down and only after setting the curve- that way I have the trimmer all the way down and have 0 in the bottom of the curve.

AFTER CALIBRATION- I set my normal throttle curve so that "actual headspeed must be AT LEAST as high or higher than your anticipated "target" headspeed.... " and set the EPA for AUX channel for headspeed I want (Thank you for tip, Juan, guys at the field have a tach, so I will adjust it with the tach). And also what do I do with throttle trimmer after calibration? Can I set back to the center?

Thank you again for help. Hope, I am not very annoying, and I explain things clearly.

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02-09-2006 09:54 PM  12 years agoPost 5
JuanRodriguez

rrProfessor

The Villages, Florida

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After calibration, you use the throttle trimmer as you normally would with or without the governor...

The whole purpose of the calibration routine is so that the TJ sees the entire range of stick movement from 0 to 100. If you had your trimmer set to anything but zero, then it will confuse the TJ and the governor will not "turn on" at the proper 25% mark.....

Does that clear things up ??

PS- After calibration and when you are setting your desired head speed, start at 50 % ATV (on the channel you have the remote set up on) and slowly work your way up until you "hear" your governor engage and then adjust from there.... like I said, don't start at the recommended "calculator" settings because they will not work !!

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02-09-2006 10:05 PM  12 years agoPost 6
sir777

rrApprentice

Moscow, Russia + Lloret de Mar (Girona), Spain

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Yes, now it is clear. But , once again, what can you tell me about that "If I first set the linear curve (0 25 50 75 100), while the trimmer is in the center and only after put the trimmer all the way down, then I will end with -13% in the bottom of the throttle curve. ". Is it ok? Or I should first put the trimmer all the way down and only after set the bottom of the curve to 0? Do you understand what I mean?

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02-09-2006 10:55 PM  12 years agoPost 7
sir777

rrApprentice

Moscow, Russia + Lloret de Mar (Girona), Spain

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Also, what about throttle cut button? I use it to stop my engine. Should I press it during the calibration, even if my trimmer is all the way down and I have the carb fully closed?

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02-10-2006 12:09 AM  12 years agoPost 8
JuanRodriguez

rrProfessor

The Villages, Florida

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I think that as long as your throttle curve is linear as described AND the trimmer is all the way down during calibration, you should be fine.....

Also, make sure you don't have any sub trim on the throttle channel AND I would disable the throttle cut feature for calibration purposes so that it does not add another variable into the mix.

Once calibrated then you can reactivate the throttle cut and way you go....

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02-10-2006 08:41 AM  12 years agoPost 9
sir777

rrApprentice

Moscow, Russia + Lloret de Mar (Girona), Spain

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Thanks. Now everything is clear. The problem now is that I am not able to try it for a long time- it is more than -20 degrees C over here.

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02-10-2006 11:30 AM  12 years agoPost 10
JuanRodriguez

rrProfessor

The Villages, Florida

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You're welcome....

-20 !!! Ouch !! Man, THAT'S COLD !!!

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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › TJ PRO calibration and setup (simple question)
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