RunRyder RC
WATCH
 1 page 567 views POST REPLY
HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Programming a Profi-4000
03-09-2010 10:40 PM  8 years agoPost 1
Rainmaker

rrNovice

Long Beach, Ca USA

My Posts: All  Forum  Topic

Objective:
To operate my Airstar Mongoose with either of two transmitters, a Robbe FC-28 or a Multiplex Profi 4000! Both operating on the Xtreme Link 2.4 Ghz system.

Background:
The FC-28 is my main radio and the receiver is set up accordingly. Just bought a profi-4000 and had Ernie completely go through it. This is to be a back-up radio. Turns out I got a great radio! Then I converted it to 2.4 Ghz and linked it to the receiver on my Airstar Mongoose and heres where the problem begins.

Discovery:
The receiver in the Mongoose is configured to the Robbe FC-28 radio. Come to find the servo out-puts from the receiver configured to the FC-28 are different than from the Profi-4000.

Conclusion:
Option #1 - Use a dedicated receiver for each radio requiring unplug and plug in all those wires. This requires labeling each wire = more inconvenience.

Option #2 - Program the Profi-4000 with a Universal "Base type" which seems more involved than my skill level of programming.

A little help please?

PM  EMAIL  GALLERY  Attn:RR  Quote
03-10-2010 07:33 AM  8 years agoPost 2
Rainmaker

rrNovice

Long Beach, Ca USA

My Posts: All  Forum  Topic

Making progress!
Ok I've made some progress! Yipee!!!!

Remember this is a helicopter I'm programming....

I figured out how to assign servos, get the two "aileron" servos assigned to receiver outputs 1&8 to rotate in opposite directions as well as #'s 2&6. So now this whats working:

#1&8 aileron servos (opposite directions)
#2&6 elevator servos (opposite directions)
#3 throttle
#4 rudder
#5 gyro

Now I cant figure out how to get the collective to work. I know its mixing servos 1,8 & 2,6 and 4

I'm stuck!

I have tried and tried to use the mixers but cant get them to work!

Any help here?

PM  EMAIL  GALLERY  Attn:RR  Quote
03-10-2010 08:35 PM  8 years agoPost 3
Rainmaker

rrNovice

Long Beach, Ca USA

My Posts: All  Forum  Topic

Heres where I'm at now. Need real help now!!!
Profi-4000 program using the “UNIVERSAL” Base Type for a helicopter using a 4 point CCPM

My servo assignments are as follows.

Receiver outputs to the servos
#1 AILERON TRIM
#2 ELEVATOR TRIM
#3 DYNAMIC THROTTLE
#4 RUDDER TRIM
#5 GYRO
#6 PITCH-AXIS TRIM
#7 UNUSED
#8 ROLL TRIM

As you can see I have the receiver output #’s:
1&8 to the ROLL servos
2&6 to the PITCH servos

Control "A" assigned to RUDDER
Control "B" assigned to COL. PITCH
Control "C" assigned to ROLL AX.
Control "D" assigned to PITCH AX.
Control "E" assigned to IDLE-UP

#1, 2, 6 & 8 are assigned to "HEAD-MIX"

In the "Servo adjustments" menu:
--TRAVEL/CURVE--
SERVO 1: HEAD-MIX
1:V-ROLL ON
2:V-NOSE OFF
3:COLL MIX ON

SERVO 2: HEAD-MIX
1:V-ROLL OFF
2:V-NOSE ON
3:COLL MIX ON

SERVO 3: DYN THR
1:HELI THR ON
2:ROLL AX. ON
3:PITCH AX. ON
4:YAW AX. ON

SERVO 4: RUDDER
ON

SERVO 5
ON

SERVO 6: HEAD-MIX
1:V-ROLL OFF
2:V-NOSE ON
3:COLL MIX ON

SERVO 8: HEAD-MIX
1:V-ROLL ON
2:V-NOSE OFF
3:COLL MIX ON

In this condition COLLECTIVE works perfectly!

Roll is controlling servo #1 (roll) port and #2 (pitch) fore
Servo #6 (roll) starboard and #8 (pitch) aft

Its as though the servo assignments are crossed in software. Again, I am using the “Universal” base type. My reason is simple, to have a second radio set up with this helicopter and want to use the Profi-4000 without having to change receivers or wiring. I should be able to program the Profi-4000 and assign all functions/ servos to comply with my current radio’s configuration seamlessly.

I hope this makes sense and you can assist in relieving my confusion.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-11-2010 11:59 PM  8 years agoPost 4
Rainmaker

rrNovice

Long Beach, Ca USA

My Posts: All  Forum  Topic

I feel so silly!!!!
My servo assignments were off by 90 deg

This is what I needed.

Servo assignment 1 & 6 = AILERON
Servo assignment 2 & 8 = PITCH

Once I corrected this, it all works great. So far!

Now I think I have another "kink" to work out.....

Issue #1- The servo travel center for servo 1 & 6 had to be adjusted to meet 2 & 8 and have a level swash plate. (See below)

Issue #2- When the adjustment "CENTRE" function is activated and adjusted to just the right percentage, the servo "jumps" or moves 3%-4% misaligned requiring me to compensate by adding in this offset. This way the servo is in the correct position for the pushrod. Something doesnt seem right here. When an adjustment is made and activated the servo should stay where you put it, not move.

Here are what the screens look like:

In "Menu 1: adjustments"
-"SERVO"
-"Servo adjustments"
-"CENTRE+LIM"
-"Limit/rev and centre"

<Servo 2: HEAD-MIX
Limit : -100% >
CENTRE : -31% >

<Servo 8: HEAD-MIX
Limit : -100% >
CENTRE : -23% >

<Servo 1: HEAD-MIX
Limit : -100% >
CENTRE : + 0% >

<Servo 6: HEAD-MIX
Limit : -100% >
CENTRE : + 0% >

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 567 views POST REPLY
HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Programming a Profi-4000
 Print TOPIC  Make Suggestion 

 1  Topic Subscribe

Wednesday, August 15 - 12:27 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online