Ah Clem
Posts: 190
Joined: 12/30/2005
From: Alhambra, CA, USA
Status: offline
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Zacc,
There have been several posts with regard to how the DIP switches on the back of the transmitter should be set.
The following info came from a forum member. I appologize, I do not know his name. Bear in mind that your machine is CCPM and his is not, so your CCPM setting should be the opposite of his.
"For everyone who's been wanting to know what the Dip Switches on the back of the Walkera 35 and 36 Tx Do, here's what I've managed to figure out so far..
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#1-Elev(ator)
#2-Aile(ron)
#3-Thro(ttle)
#4-Rudd(er)
#9-Pit(ch)
#10-Gear
are all servo-direction-reversing switches. When I replaced the standard Walkera Dragonfly servo's with Hitec HS55's I found that they move in the opposite direction to the dragonfly servo's, so all these switches needed to be flipped to make the servo's move the right way. For standard servo's they should be fine the way they come.
If a channel is moving the wrong way, flip it. Be careful flipping #3, since on the Walkera Rx, the integrated Speed Controller is internally coupled to channel 3 and you will end up with full-power being at the idle stick position.
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#5-Heli/Acro switch enables a feature that I think other radio's usually call "Revo (Revolution) mixing" that is sometimes used for Helicopters.
As you increase the throttle (channel 3), it adds a bit of rudder (channel 4) automatically to compensate for the increased torque reaction from the increase in power going into the rotor. The screen-print labelling on my Radio for this channel seems to be backwards though. When the switch is to the left (Heli mode according to the screen printing) the feature is disabled, when it is to the right (Acro Mode) this feature is enabled.
It doesnt seem to be necessary with the Walkera gyro, I find the Heli stays stable with this feature disabled.
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If you do enable Switch #5, then switch #6 determines what direction the rudder channel (channel 4) will move/mix as you add throttle. If the rudder-revo correction is the wrong way, then flip this switch. Again, this one probably doesnt matter for Walkera choppers, since with #5 switched off, #6 has no effect.
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#7 changes the transmitter mode from CCPM (Cyclic/Collective Pitch Mixing) to "Normal". CCPM mode is used on some Helicopters that have 3 servo's connected directly to the swashplate and move them in combinations to control both the pitch and collective (hence the name).
With CCPM Mode, Collective Pitch is increased by moving all the swash servos up at the same time, Forward/Backward and Side/Side Cyclic Pitch is varied by moving two of the swash servos in opposite directions. Again, this feature isnt used on the Walkera Choppers since they dont use CCPM - Their rotor head uses a seperate collective servo which requires "normal" mode.
Supposedly CCPM is better for less slop in the rotor head since there are less linkages to get sloppy, but requires stronger servo's since they are coupled directly to swashplate and have to cop the full swash forces and vibrations.
Again, on my Tx, the CCPM/NORM labelling is reversed. Normal mode is to the left and CCPM mode to the right. If more than 1 servo moves when you move the cyclic stick, your Tx is in CCPM mode. Even if using a CCPM Heli, you will need it to be in normal mode for use with a simulator via a cable.
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#8 is the pitch curve lock/unlock switch. This one is actually labelled correctly !
With it in the lock position, the PZT/PLT knobs have no effect and stay as there were when it was last unlocked. When in the Unlock position, the PZT/PLT knobs will work, and when returned to lock, the Tx will remember the last PZT/PLT settings.
from what I can tell, the PZT is probably the "Pitch Zero Trim" (or something like that). It sets the "Zero Point" of the throttle/pitch curve. Zero is the lowest pitch position which is at low-stick when in "Normal" mode, and at Mid-Stick in 3D ("1" mode.
"PLT" is probably "Pitch Length Trim" or some other piece of "Engrish".. It sets the Travel or Range of the collective pitch servo (or all 3 swash servo's in CCPM mode). With it turned all the way down, the position of the throttle stick makes no change to the collective pitch. With it all the way up the pitch travel is at maximum.
In normal mode, the travel is one-way, from the "Zero Point" (PZT) to the maximum set by the PLT knob. In 3D (1) mode, the Travel is two-way to either side of the set Zero-Point. I suppose this is so you can set negative-pitch at down- |
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RE: Walkera 22E Lets Talk - 
