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orangecrush
RC-Monster Carbon Fiber
 
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Join Date: Jan 2008
03.15.2008, 07:22 AM

Quote:
Originally Posted by supralover72 View Post
Nice to here all you needed was a good shim job!
Don't we all???

   
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othello
HV basher
 
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Join Date: Jun 2007
Location: Austria (Europe)
03.15.2008, 11:03 AM

Hmm ... this is interesting. A friend of mine experiences the same problem with his Mugen MBX5T Truggy (MGM 16018, Neu 1515/1Y, 6s2p A123). When playing with throttle (blipping), it basicaly locked the 4 wheels for a split second. We always thought it was due to the ESC programming. We tried different settings, auto tuned it several times. Emailed MGM ... no satisfactory answer received.

I had similiar issues in my truggy with a kontronik Jazz ESC and also had some bad nose diving from time to time when i released the throttle to neutral. After replacing and shiming my diff bevel gears it went away too.

Guess we have to look more carefully into the mugen diff bevel gears shimming.

Thanks for sharing.


Brushless 1:5 custom 4wd Baja based on 1:8 truggy chassie
Jazz 55-10-32, Neu 1515/2Y (1100kv), 9s2p A123 (27v), up to 3.1KW
Latest video with eagletree Data inserts: Run on asphalt
   
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orangecrush
RC-Monster Carbon Fiber
 
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Join Date: Jan 2008
03.15.2008, 12:03 PM

Quote:
Originally Posted by othello View Post
Hmm ... this is interesting. A friend of mine experiences the same problem with his Mugen MBX5T Truggy (MGM 16018, Neu 1515/1Y, 6s2p A123). When playing with throttle (blipping), it basicaly locked the 4 wheels for a split second. We always thought it was due to the ESC programming. We tried different settings, auto tuned it several times. Emailed MGM ... no satisfactory answer received.

I had similiar issues in my truggy with a kontronik Jazz ESC and also had some bad nose diving from time to time when i released the throttle to neutral. After replacing and shiming my diff bevel gears it went away too.

Guess we have to look more carefully into the mugen diff bevel gears shimming.

Thanks for sharing.
It was suggested to me at one time to increase the throttle trim or open up the deadband percentage. The reason being that as you left off the throttle, it would extend past the dead zone and basically hit "reverse" for a split second.

I tried that and at first it seemed to help but after more driving, nope.

I drove the truck last night for a while with not one instance of nose diving and will mess with it today but I'm pretty sure that will fix the problem because like I said, when you manually pushed the pinion gear into the diff while spinning it by hand, it would literally lock up.

Now with the washer there, it won't allow it to go so far back into the diff.

I'll post more later....

Mark
   
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