Hi,

I have problem with my tamiya tiger. It isn't possible to turn in place in both directions:
I have two examples:

1) I can turn left(spin) - both tracks move in different direction - it is OK. But It isn't possible to turn right in place. (only right track move forward)

2) After i tune DMD (RUDD) i can turn in both directions but It isn't possible to move forwad (tank always turn sharply )


Any one have similiar or any problem with DMD ? Does it mean that my DMD is broken ? Is it any warranty on Tamiya DMD? HELP
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Are you absolutely sure that the reciever is plugged in correctly? Sound slike that might be the problem. Or...motor leads are in the wrong configuration. Again, a possibility. I would recheck these things first, as the rudder tim should hardly ever need to be touched on the tamiya.

Yes, I've had very similar problems.  I'd I suggest you try doing a reset/ reprogramming your DMD unit.  I've found that an inability to pivot in place is nearly always remedied by a simple reprogram of the DMD.

If for some reason, that doesn't fix it, I'd recommend the following:  1. Verify you have a fully charged battery (I know it sounds redundant, but I've had dead batteries give me fits, as I was certain the problem was elsewhere); 2, Verify your radio tx and rx are functioning correctly (I usually isolate the rx,  plug a fully charged 4.8v rx battery into the batt port on the rx, and then check each channel's operation using a spare servo); 3 Check your wires going to the motors from the DMD.  I've mixed them up before, and it does funny things to the tank; 4.  Lastly, take a DMD out of another tank (or a spare one if you've got it (I usually have a spare electronics set (MF and DMD) to troubleshoot problems) and see if the replacement works in the Tiger. 

If you don't have an extra set, then you Email Tamiya for authorization to send the DMD in for a diagnosis and repair.

Good luck!

   

I am sure that everytyhing is connected properly.

For now i know:
1) it doesn't depend on the battery in my case. I checked it on full and nearly empty.
2) it isn't a problem (checked with two kinds of batteries) but i will try change steering with turret rotation
3) wires seems ok.
4) I have only one tank and i can't check it with other motors - it is expensive hobby here in Poland. Do you have email to tamiya?

All in all i first try reset on DMD during this weekend. It give me hope. Thx Jeff489
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sounds like motor leads to me also

99% sure it's the motor leads Plugged in wrong, ive done it a few times my self

If you are going to re-program the DMD, be sure to verify the trims and sub-trims (if available) on the radio are at 0 (the mid point) for the channels being used.

Thx all for trying to help. I checked other things before as i wrote.

Problem is solved. I reseted DMD and now all works properly.

Big thanks forJeff489. You give me smile on my face<br type="_moz" />

That happens to me every once in a while too. The first setting doesn't work and a re-do is in order, then all is well.

Glad you're all set!










~ Jeff