I'm new to the RC tank world and built my first Tamiya Panther G. I bought the Spektrum DX5E transmitter with the AR500 receiver. I have gotten everything to work properly following the setup including main gun and machine gun with exception of the tank driving forwards and back with the left stick. If I press the left stick all the way up, the tank engine dies and then restarts. Could someone help this tank dummy out with this problem?

Yes, common issue would be the battery is too low and this is simulating the tank running out of fuel. Charge  replace the battery in the tank.and try it again.</p>

Yellowshaker - Thanks for the prompt reply. I don't think this is the issue however. Every other function works correctly. I can drive the tank around in circles using the right stick, but the left stick does nothing when pressed up or down. The left stick works correctly for turning the turret. I should preface this by saying that the left stick is not an auto return to neutral stick like the right. I'm not sure if this is an issue? The tank only shuts down when the left stick is pressed up all the way. I might try to recharge the battery again if you are correct.

Well, normally, I have my tanks set up to run driving controls on one stick, while turret functions are on the other. However, I cannot see why this would cause you to have any trouble. What size or capacity battery are you running in the tank? It may have enough power to perform some functions, but not enough to pull it under a alot of load, causing it to shut down.

NiCD Battery Pack - 7.2V 1700 mAh

I appreciate your help and patience. Much of this is still Greek to me.

OK, that pack has very little power, especiall for a tamiya tank running a DMD and MFU. I am not saying it won't work, just that you will have little run time with it. I suggest recharging it and trying the tank again. If this does not work, let us know and we can go further, but I think this is your trouble. Try to get yourself a good pack. Maybe 3800 or over mHA. You can fund deals on ebay or search allbatterypack.com. Let me know if the recharge helps.

Much appreciated. I just wanted to make sure I didn't do anything incorrectly during the setup. I'll try recharging the battery pack first to test and replacing it. If I continue to have trouble I'll be back for some more troubleshooting. You mentioned that you have all the turret functions on one stick and all movement on the other. I just followed the standard Tamiya instructions. If I want to follow your lead would I just switch the channels in the receiver?

Yes, simply switch the lines to the reciever and that's all...

I bought a much larger battery pack (5000 mAH) and I'm still having trouble. I think it is either a problem with transmitter setup or a problem with my motor installation (I installed the Impact 3.1 gear ratio and metal tracks). It appears that my right side tracks spin a little faster than the left causing the tank to turn slightly when driving forwards and reverse. Also when I hold the stick to the left the tank turns appropriately (left side stops while right turns), but when I turn to the right it does nothing and that's when the tank sound engine winds down and restarts. Any ideas for troubleshooting?

Did you break in the new gearboxes? Have you used a piece of typing paper between the gear and pinion gear to set the proper lash? Is one side of your tracks harder to move than the other side? Check all of this out also.

Herman

If this is a Tamiya DMD you may need to adjust the motor setting its a screw on the top of the DMD called rud to balance the motors .

Jimmy

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name="Colorful Grid Accent 6" unhidewhenused="false" semihidden="false" priority="73" locked="false"></w:lsdexception> <w:lsdexception name="Subtle Emphasis" qformat="true" unhidewhenused="false" semihidden="false" priority="19" locked="false"></w:lsdexception> <w:lsdexception name="Intense Emphasis" qformat="true" unhidewhenused="false" semihidden="false" priority="21" locked="false"></w:lsdexception> <w:lsdexception name="Subtle Reference" qformat="true" unhidewhenused="false" semihidden="false" priority="31" locked="false"></w:lsdexception> <w:lsdexception name="Intense Reference" qformat="true" unhidewhenused="false" semihidden="false" priority="32" locked="false"></w:lsdexception> <w:lsdexception name="Book Title" qformat="true" unhidewhenused="false" semihidden="false" priority="33" locked="false"></w:lsdexception> <w:lsdexception name="Bibliography" priority="37" locked="false"></w:lsdexception> <w:lsdexception name="TOC Heading" qformat="true" priority="39" locked="false"></w:lsdexception> </w:latentstyles></xml><![endif]><![if gte mso 10]><style type="text/css"> Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}</style><![endif]><p class="MsoNormal">I've got a few ideas.<span style="mso-spacerun:yes"></span>First, I think you've eliminated battery problems.<span style="mso-spacerun:yes"> </span>Low voltage in a Tamiya DMD/MF system causesthe DMD to cut off intermittently.<span style="mso-spacerun:yes"> </span>In such a case, everything would die, and then the tank would perform a restart. This process repeats over and over.<span style="mso-spacerun:yes"> </span>You've obviously got right track power, so I'd suggest looking elsewhere.</p><p class="MsoNormal">When I have a problem with a tank(and know I've got good power), I always try to isolate whether it is a tank problem or radio problem.<span style="mso-spacerun:yes"> </span>To check for a radio problem, I use a 4.8v receiver battery (local hobby shops sell them for fairly cheap) and a spare servo (Local hobby shop...again).<span style="mso-spacerun:yes"> </span>I remove the receiver from the tank (I disconnect everything from the rx) and then plug the battery into the rx's "batt" terminal.<span style="mso-spacerun:yes"> </span>Next, I plug in the servo to each channel on the rx (one at a time, checking each for operation).<span style="mso-spacerun:yes"> </span>If all channels respond to the check, I pronounce the radio and rx good, and reinstall it in the tank.<span style="mso-spacerun:yes"> </span>I move on to the tank as the source of problems.</p><p class="MsoNormal">To begin checking the tank, double check the motor wiring.<span style="mso-spacerun:yes"> </span>This would be the wires from the DMD to the motors.<span style="mso-spacerun:yes"> </span>Refer to your Panther instruction manual at page 15.<span style="mso-spacerun:yes"> </span>Double check the right and left motor connections.<span style="mso-spacerun:yes"></span>If all is well, put the tank up on a safety block on the bench to prepare for a test run.</p><p class="MsoNormal">Next, open the tank, and run test the tank.<span style="mso-spacerun:yes"> </span>Try the right turn.<span style="mso-spacerun:yes"> </span>Observe what color the DMD lights are at the moment the malfunction occurs.<span style="mso-spacerun:yes"> </span>Refer to your Panther operation manual (the little book that came with the tank) and look at pages 17-19 to see if you can find the corresponding error code and the meaning.<span style="mso-spacerun:yes"> </span></p><p class="MsoNormal">If this fails, then I would perform a reprogram of the DMD<span style="mso-spacerun:yes"> </span>Check the Panther assembly manual at the top of page14 for the instructions to see how to do one.<span style="mso-spacerun:yes">
</span></p><p class="MsoNormal">Note, that you can also adjust the direction of the tank's drive (a.k.a.the yaw rate) with a small pot on the DMD (marked "rudd") located on the DMD's upper left side, right between the "set" and "MGun"adjustment pots.<span style="mso-spacerun:yes"> Inconsistent speed (right vs. left) track can be trimmed out using the "Rudd" pot on the DMD, trimmed using your TX trim tab, adjusted manually (usually caused by a bind in the drive train), or in some instances, it can be motor timing. IMHO, it is usually a mechanical binding issue. I adjust them by disconnecting the motor from the TU, and spinning the track manually to feel for the resistance. I spin each side, feeling for a difference in resistance. Usually, it is something as simple as too little gear lash between the motor pinion and the TU.
</span></p><p class="MsoNormal">If it still doesn't turn correctly, I would change out the DMD with a spare (only if you have one), or by borrowing a DMD from another tank (again, only if you have one).</p><p class="MsoNormal">If all has failed, you may have a defective DMD T-03 unit and contact the manufacturer by email for further instructions and assistance.</p><p class="MsoNormal"></p><p class="MsoNormal">Good luck!</p>

Thanks for all the help fellas. Turns out that I'm just a big dummy and it was the rudder adjustment on the DMD. I suppose I'll chalk this one up as a rookie mistake. Speaking of mistakes; in all my excitement of getting the motor to run properly, I frayed the wire to the machine gun. Guess I'll be looking for a replacement piece :-( AT least I finally got the tank running!

Bice! Glad you got it fixed up Can't the MG wire be repaired?

I might see if I can fix it. I cut one of the wires in half. I had the top open testing the motor and the wire got caught in the gear and chewed it right in half. It was just a stupid mistake on my part.

Splice in a new section of wire by soldering and cover with heat shrink. It will be as good as new.

Herman

If you have not converted your DX5e to self centering on both sticks here is how I did it back in 2009 .

http://www.rcuniverse.com/forum/m_87...tm.htm#8726120

Thanks
Jimmy
Detroit Tank Command