I just bought a new r/c unit ii mz212 board and fitted it into an mr02 chassis today and can't get the steering to center at all.
When I move the steering trim on the transmitter, it will turn full left or full right - there is no threshold to keep the steering centered.
I've used different transmitters, different crystals with no luck.
The servo gears are brand new, no binding at all.
I've taken the servo gears out, and just had the steering motor and steering pot and manually turned the steering pot to try and find center but it won't. The steering motor will either go left or right and won't stay stationary.
I've tried adjusting the screw on the circuit board and it's already in the range of the tx steering trim.
Is my steering pot stuffed and sending wrong messages to the pcb ? Have I missed any other checks here ?
i wish there would be a whole thread dedicated to "steering" issues... probably some of the mods can even make some of the posts a sticky as reference...
I have tried the tx with my other mr02 and it works fine.
I don't have the tiny washer in place as my iw02 didn't have that washer
This is an expensive build up converting everything from an iw02 to kyosho "except the servo gear shaft set".
Does the washer make that much difference ? I had the whole servo assembly detached from the steering pot.
Here is a video of what is happening. Keep an eye on the wheels and watch it slowly move to the other direction without me touching the controller.
If I adjust the steering trim ever so slightly, the same thing happens but in the opposite direction. There is no centering.
I've ordered a steering pot, so will have to do some more tests when they arrive.
Sometimes I use a 1mm slice of a ball pen cardridge (Bic pen) to replace these washers.
When you reassemble the servo case (with the washer), and before you put it in the chassis, make sure the servo gear drives the pot. To do this turn the largest gear with the finger and check behind the pot if the axle of the pot is turning as well.
The little washer (I had to use the pen tube tip) made all the difference and I now have a working mr02 that centers properly !
What got me was that the iwaver 02 that I was slowly converting all parts to kyosho, didn't have the brass washer and I didn't think much of it. How wrong was I.
hmm... we're legends now... hehehe...
nice to hear it all worked out...
thanks to fovea3d for that absolutely cool radical tip...
it saves you all the trouble of purchasing that "kyosho servo gear shaft set"
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