Quark fried, blown capacitor...

[zeropointbug]

There you go. :)

http://picasaweb.google.com/SethHuls...60047985108770

http://picasaweb.google.com/SethHuls...60047985108786

And yes, this Quark surely dissipates mucho heat! One high speed run and it's warmed up good. I am paranoid now over the Quark after the big ordeal.

[smhertzog]

I've been running what I call my Frankenquark for a while now. It originally had a bunch of heat sinks on it but I found they were not necessary. It always ran very cool but the caps would always get very hot as high as 200 f. Well after blowing a few caps I decided to try the sky extra cap idea. So far so good. The piece of angle gets 105 f directly over the fets and were the two pieces of angle overlap and bolt to the chassis they got up to 145 f. I thought that was a little odd. I thought the angle directly over the fets would be the hottest area? The wires and the area were the caps are soldered to the wires also got up to 145 f. This is without a fan in a crt geared 15/46 with big tires driven very hard for three straight sets of orion 4800 4s lipo packs (about 40-45 minutes of continuous racing).

zpb, my Quark still gets hot too. Much hotter than my MM esc. That's why I was thinking that the caps weren't helping, but since I added the caps, I haven't blown anything and the cooling mod did stop the thermals.

I might go the my LHS and pick up a "better" radio. Didn't someone else just release a nice radio?

I need to get the new radio because MGM says that there wasn't anything wrong with my Compro. They are blaming my problems on the Spektrum, so I'll have to see.

[jhautz]

Originally Posted by AAngel

I might go the my LHS and pick up a "better" radio. Didn't someone else just release a nice radio?

I need to get the new radio because MGM says that there wasn't anything wrong with my Compro. They are blaming my problems on the Spektrum, so I'll have to see.

Thats wierd. I just set up my MGM 160-24 with spektrum and didnt have any problems.

I did have a probem with mine onlyu beeping when I plugged it in, but I figured out that the 160-24 doesnt have a BEC built in an when you unplug the red middle red wire it just doesnt work. Once I plugged in the center wire, it was all good.

[zeropointbug]

Yeah, I am going to cut a larger hole on the other side of the heatsink, there is only a small hole there now. I am sure that has something to do with it, and the fact that the stock thermal pads plain suck... I need to get that heatspreader clamp from my machinist, waiting.... :025:

But yes, no blow ups yet!

SMHertz dog, do both the top and bottom FET's on your heatsink get to the same temp? Maybe it's not touching some of the FETs?

AAngel, I have been playing around with the radio last night and with all the EPA and stuff, and got almost all low speed capability back now, but still not what it was, there isn't near as much travel in the spektrum, I like more travel. (throttle trigger)

Now if there was only a way to test high voltage before I get the Neu 3D.

[smhertzog]

Originally Posted by zeropointbug

SMHertz dog, do both the top and bottom FET's on your heatsink get to the same temp? Maybe it's not touching some of the FETs?

Yes.

I used artic ceramique on the fets/angle on both boards/angles, but I used heat tape between the chassis and the angle maybe thats were the bottle neck is?
The chassis measured from under the truggy in the area were the angle is bolted measures 125 f.

[suicideneil]

ZPB, one idea to get more throttle travel, or at least more perceived sensitivity, is to have a longer trigger- how you might do this mod is another thing though. And I noticed your A123 packs dont have balancing taps (may be going blind though), does it make any difference, or is it just not really required with the Li-ion cells?

jhautz, I tried both of my Spektrum radios and the MGM wouldn't program for freewheel.

I was surprised when MGM said that there was nothing wrong with my Compro. The radio is the only thing that I have to look to now. When I get the Compro back, I'll just have to try it again. If it doesn't work, I'll just dump it. Maybe I'll just send it to you to see if you can get it working. LOL

I'm just kind of hesitant to have you confirm that I am, indeed, an idiot.

[suicideneil]

That is truelly bizarre. Have you thought about trying that adaptor thing which is used to operate a plane/heli esc via pistol grip radio? Pixstick or something it was called... Also, have a good fiddle with the epa setting etc (I'll refrain from making a joke about playing with your knobs.... ah, too late).

Hey, I LIKE playing with my knobs.

Anyway, I did try turning the throttle epa up to 125%. Perhaps I should try turning it down. I don't know. All I do know is that I've been waiting for around a couple of months just to have MGM send me back what I sent them in the first place.

[smhertzog]

I had the same problem with my mgm it was like the drag brake was always on. I never figured out anything that fixed it.

[BrianG]

Whenever I program a radio to a new ESC, I always make sure EPAs are set to 100% (no more, no less) on both the forward and reverse directions (they are seperate settings on a Spektrum). Also, set the trim to centered.

Brian, that's the same thing that I do. With the MGM, I went as far as to reset my Tx to factory default settings on everything, to make sure that I didn't miss anything. Still no go.

[BrianG]

Do you know if MGM actually tried to run it in a vehicle, or did they simply use some type of diagnostic equipment?

[zeropointbug]

I don't know about this, I managed a run in today, boy this 7XL is a handful. I forgot how powerful it is, I am wondering if the 1512/2Y would have been a better bet than that 3D? Mike said it's in Wednesday, but it's not too late just to use a different motor as he said.

I now want 7XL power or LESS, not MORE! No matter the terrain, I can wheelie at any speed! It's just too much.

My Quark thermaled today too. :mad:1 :019: