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View Full Version : Welcome to the 14MZ forum


EricLarson
03-29-2005, 09:19 PM
Hi all, I wanted to say welcome. This is a place to ask questions and hopefully get all of your questions answered. Will asked me if I would like to be a moderator in this forum and I am happy he did.

First I will give you my impressions of the new radio. #1 I am very impressed with the radio system. Most of the reviews you read online are covering the fancy touch screen and the 14 channel's, but those are very small parts of the significant advantages of the radio system. When the radio is combined with the new R5014 receiver you get the full benefit of 2048CCPM and a 40% faster transfer rate over the 9Z. That resolution and speed are very apparent when flying an electronic CCPM helicopter.

The second best feature in my opinion, is the true ability to run any frequency on your modules band. At a recent funfly I changed frequencies several times and the system works very well. Unlike the old 309 receiver, the new R5014 is safe to use in helicopters.

The feel of the radio has taken me a few weeks to get use to. If you currently fly a 9Z the transition will be very easy. I transitioned from a 9C radio and it was a bit more severe especially considering I was just breaking it in at one of the larges funflies of the year (Bham)! The first thing I noticed over a 9C was that the throttle stick travel is reduced. This turns out to be standard in the top models of Futaba radio's and I have not gotten a very good answer why the stick travel is limited. This can be easily removed, but the radio will need to be sent to Hobby Services for the removal and recalibration. Also the spring on the sticks are a bit soft even when full tight. This is also easily fixed, but again you need to send the radio to Hobby Services. If you take the radio apart yourself just use some caution, as I am told the main board in there is around $600!

Other than those issues the radio feels very high end in my hands. The sticks are very smooth and accurate. The case is nice and smooth which allows you to clean it very easily.

The radio programing is pretty straight forward. The main menus are separated into 3 groups. Link, model, and system. A few hour of playing with the menu's and you will be right at home. The only menu that confused me some is the Swash Plate Detail menu in the Linkage section. As it turns out this menu is one of the most valuable tools in the radio for Electronic CCPM helicopters. Cliff Hiatt and Wayne Mann are working on a 14MZ heli guide that should be very valuable, but it will be a little while until it is done. Until then, here is a bit of information Cliff sent me (note, there will be updates to this):

Note: It is very critical that the balls on the inner ring of the swash plate are in perfect line with the balls on the outer ring of the swash plate when performing this tuning exercise, otherwise you will be introducing fore and aft cyclic when you give right and left cyclic and vise versa. Also when you give a full cyclic command make sure that you are only giving that command and that you are not inadvertently holding a small amount aft cyclic with right cyclic and so on.



Here you will adjust the servo throws to keep the swash plate level throughout the entire collective range and eliminate interaction with cyclic inputs while at either end of the collective range. In the Linkage Menu click on Swash then click on Swash Detail in the top right corner of the screen. In the Mixing Rate box the first two mixes you see are PIT to AIL and PIT to ELE. These two mixers are used to level the swash plate at both ends of the collective travel. If you move the collective stick up you will notice that the two left boxes are highlighted and if the collective stick is down the two left boxes are highlighted. To make adjustments click on the highlighted box that you want to adjust then use the data input keys on the right side of the screen to make adjustments. With the collective stick up at full pitch and looking at the nose of the model adjust the PIT to AIL mix so that the swash plate is level. Move the collective stick to the bottom and do the same thing. Tip: Set a pitch gauge to 0 and put the gauge on one of the fly bar paddles. You can use the top of the rotor head for a level reference. This makes any movement in the swash plate very easy to see. Now turn the paddle with the pitch gauge 90 degrees so that you are looking at the side of the model. Now adjust the PIT to ELE mix so that the swash plate is level at high and low collective.



The next three mixers are used to stop interactions in the swash plate when the collective stick is at 50% or centered. Adjust the AIL to PIT Mix so that when you give full left and right cyclic the swash plate stays level in the fore and aft plane as viewed from the side of the model. Next adjust the next two mixers, ELE to AIL and ELE to PIT so that the swash plate stays level in the right and left plane when full fore and aft cyclic inputs are made. This is best viewed from the nose of the model.



Next we will adjust the Linkage Compensation. This adjustment compensates for interactions in swash plate deflection at extreme collective settings. There are four adjustments for high collective and four adjustments for low collective. With the collective stick at the top and viewing the swash plate from the side adjust the Aileron mix so that there is no fore and aft cyclic change in the swash plate when full right and left cyclic is applied. Now turn the rotor head 90 degrees and do the same adjustments for Elevator. Now lower the collective stick and go through the entire process again.



Speed Compensation. This adjustment is for 120 degree ECCPM only. Because of the mechanical advantage of the Aileron and Pitch servo they are twice as fast at getting from full forward cyclic to full aft cyclic than the Elevator servo is. This problem is usually only seen when operating the fore and aft stick back and forth rapidly. Adjust the Speed Compensation so that the Heim Ball in the middle of the swash plate doesn't jump up and down when operating the fore and aft cyclic stick rapidly. This setting seems to be close when adjusted between 15 and 20.


If you are loading in pictures you need to have them in BMP format and the size should be 168x80 pixels. Music needs to be in WMA format and formatted for lower resolution. Audio files need to be in WAV format.

With a simple Compact Flash card reader you can back all of your information up on your computer. What a sense of security to have all of the files backed up!

Also don't worry about the win CE operating system. The radio contains 2 processors and you will not crash a model due to a system crash. I have locked up the radio by using music files that where too high of a resolution and then trying to use other menu's in the radio. When it locked up it would not even turn off. I use the opportunity to go fly to check the use of the radio if it locked up and it was fine. To unlock it, I just removed the battery for a few seconds and reinstalled. All was well.

I am sure there will be lots of questions, so I hope together we can fine the answers. The radio is very impressive, and I am looking forward to getting to know every last feature in the radio.

WillJames
03-30-2005, 01:10 AM
Thank you Eric!!

RCfan
03-30-2005, 01:17 PM
Hey Eric,

Think I can borrow your 14MZ to "verify" all this??? :noteworthy

EricLarson
03-30-2005, 02:10 PM
:) maybe rent, maybe around $500 per hour :shock:

rcman
03-30-2005, 06:07 PM
This will be great I hope to get mine soon, so I will be watching this
I will be switching from the JR 10X so we will see ;)
David

EricLarson
03-30-2005, 08:10 PM
You will be very happy with it. I realize it is a big amount of $ and I will be the first to recognize that the lower end radios are very good. Heck I use to fly the 9C and it is one of the best bang for the $ radio sets on the market. I look at the 14MZ like a high end camcorder and the price seems more reasonable. Also I have yet to destroy a radio in a crash so it seems like a pretty safe investment :cool:

Shannon Davis
04-01-2005, 01:16 AM
Thanks for the info Eric. I will be using these tips this weekend as I set up my Tempest FAI. I will try to add any tips I learn when I get a free moment. If any one has any questions feel free to call me. Just wait till after about 9:00 pm.

Shannon
888-920-7746

Chuckie
04-29-2005, 10:54 AM
Sorry this is going to be long. But hey it’s Friday and I have the time and inclination.


Next we will adjust the Linkage Compensation. This adjustment compensates for interactions in swash plate deflection at extreme collective settings. There are four adjustments for high collective and four adjustments for low collective. With the collective stick at the top and viewing the swash plate from the side adjust the Aileron mix so that there is no fore and aft cyclic change in the swash plate when full right and left cyclic is applied. Now turn the rotor head 90 degrees and do the same adjustments for Elevator. Now lower the collective stick and go through the entire process again.


When I started to program my first heli with the 14mz I adjusted the link compensation as described above. Used in this way this feature is hard to set as there are so many variations and sometimes they don’t allow you to compensate in the right direction. People who have used this feature know what I’m talking about. If you move to high pitch and set the +- value to + for Aileron right then move to low pitch and now the +- value of Aileron Right cannot be different than +. Right and left aileron can be set differently but the + or - value you pick on one extreme of pitch is not different than the other extreme. One would think if Futaba designers disconnected the +- selection at the extreme positions the link compensation feature would be more useful.

I never understood why this was limited until I came upon my new method. Finally, all these adjustments might not be necessary if manufactures would produce servos who’s end points would not change over time. The 9252 servos in my Tempest are over +300 flights old and you should see the values I need to enter to get a level swashplate!

I was first trying to use link compensation to set the position of the socket head screw of the anti rotation bearing when cyclic was applied at the full +- pitch positions. In some cases the compensation would not allow me to reduce the movement of the socket head. I didn’t notice a problem during flying and I do agree the ECCPM swash adjustments in the 14mz are better than the 9z or 9c radios. In flight the model needs less correcting with the 14mz; either using the above method or not using/setting link compensation at all. With this alternative method I don't know if I've created a problem but it seams to make sense. I have not flown the model yet.

Here’s the alternative method: The other night I was tweaking the 14mz for my second Tempest 3D as I just got a second 3G receiver. I had adjusted all the items in the swash detail screen and reinstalled the rotor head. I was then going to set max cyclic pitch on the main blades. As I was looking at the angle of the swashplate with full forward cyclic applied I moved pitch from mid to full stick and noticed the swashplate angle changed. It was reduced at the end point/ max pitch. I then moved pitch to full low and noticed the swashplate had a different angel than from mid stick; again it looked like the swash angle was reduced. I then gave full back cyclic and looked for the angle and it was off at the ends as well

I noticed that if I used the Link Compensation I could keep the swash angle constant throughout the full pitch travel. Too much compensation and the swash plate went through many angle changes as I reached pitch stick travel ends. So I backed off a little for best results. I then rotated the heli to face the nose and applied right cyclic to check the angle that direction. The link compensation could again be used to keep the swashplate angle constant throughout the pitch travel.

I would like to confirm that I have constant pitch values on the main blades when holding cyclic pitch at min/max pitch with this alternative method. I can’t do this with the Robart pitch gauge that I use. This would confirm that I have +- 6 degrees of cyclic pitch change at the extremes of pitch +-10 degrees. Anyone have a ‘Robart’ accurate +-17 degree pitch gauge?

Visually keeping the swashplate at the same angle (full forward cyclic) as I move the pitch from low to mid to high should give me constant cyclic rotation of the heli in the air. The cause of the reduced cyclic pitch at the extremes is due to the fact that we are using servo wheels versus sliders. As the servo wheel rotates the ball link moves a reduced amount horizontally (in the case of Fury’s) at the ends of travel due to the nature of round wheels. This may be a good thing because in hard 3D flying one sometimes has too much main blade pitch as were giving extreme cyclic commands. The cyclic commands are in affect reduced with round servo wheels at the end points.

The link compensation is acting like an end point expo for pitch when cyclic is used simultaneously. Checking the socket head screw in the swashplate I didn’t notice my new link compensation settings having a bad affect. They didn’t help reduce the movement of the screw either but I had more adjustments entered in the link compensation and some of them would not have been entered if I used the original method.

Does this mean my method is correct? Don’t know but maybe we need both; a function to keep the swashplate level at full pitch when applying cyclic 90 degrees away (this would require changes in the current link compensation) and a function to maintain cyclic angle during pitch changes.

Charles

Chuckie
04-29-2005, 03:11 PM
I've continued to tweak my model this afternoon and believe I posted an incorrect observation. When setting the elevator link compensation I still think its best to observe the swashplate angle from mid stick and set low and high pitch to have the same angle, same as I described in my first post. However, for the roll direction it seems better to observe the socket screw head and minimize its movements. When setting the aileron link compensation, the roll angle is close to constant but the swashplate may pitch up or down. So I'm updating my post here to say both methods are needed when setting the link compensation. More people need to play with this feature to be sure I’m proposing the correct methods. Every time I play with this radio I learn something new.