Quark regenesis! - Page 2 - RC-Monster Forums

zeropointbug · 06.23.2009, 03:26 PM

Here is the Quark mounted... now I am trying to organize everything neatly and so nothing will get cought, or thrashed around. It's getting there.

florianz · 06.23.2009, 03:45 PM

very cool! THAT'S what I call a a modded esc.

i got some low esr caps, at least the best I could get here. here's a pic of the actual one:

it's a 125a esc, where you see the power cables there are the bigger caps. like that after hard bashing the temperatures are around 30-40 deg. c.

The funny point is: the two other (burned/shorted) esc and this one are super reliable, great throttle response. when I read about all the probs with MMM etc, I don't understand how these cheap esc's are so reliable and rugged. except the bl..dy breaks. I don't have mechanical breaks, but you get used to it...

florian

BrianG · 06.23.2009, 03:51 PM

I've added a couple caps to my Quark. Just enough to make a difference, but not enough to be cumbersome:

florianz · 06.23.2009, 03:54 PM

looks good. but be careful that that the caps don't get "hurt". I had that a couple of times that - due to a crash - the caps cracked. suddenly the esc lost power after some minutes. later I found out that the reason were the caps.

06.23.2009, 04:05 PM

I don't get it? What are the advantages of those Capacitors?

BrianG · 06.23.2009, 04:22 PM

Caps help to shore up the battery for the high current draws during the PWM pulses.

Arct1k · 06.23.2009, 04:29 PM

The dreaded ripple....

But sadly even artur couldn't save my quark :`(

florianz · 06.23.2009, 04:36 PM

they help the esc to handle the peaks in current

zeropointbug · 06.23.2009, 05:53 PM

Yes, it helps the 'micro peaks' in current, the esc needs very low resistance to operate properly, batteries are no match for low esr caps.

And GOOD NEWS, I just went out for a test run, and Viola! It works wonderfully now! Brakes don't cut out anymore when batts are fresh, and the brakes feel different now too, call me crazy, but they do. The motor sounds different too, especially when braking (that digital buzz noise). Only cogged once too, usually cogs quite a bit on fresh charge.

Now I just need to get this motor checked out, it's getting too warm too fast.

zeropointbug · 06.23.2009, 05:56 PM

Quote:

Originally Posted by florianz

very cool! THAT'S what I call a a modded esc.

i got some low esr caps, at least the best I could get here. here's a pic of the actual one:

it's a 125a esc, where you see the power cables there are the bigger caps. like that after hard bashing the temperatures are around 30-40 deg. c.

The funny point is: the two other (burned/shorted) esc and this one are super reliable, great throttle response. when I read about all the probs with MMM etc, I don't understand how these cheap esc's are so reliable and rugged. except the bl..dy breaks. I don't have mechanical breaks, but you get used to it...

florian

Yikes, is that a green eggs and ham sandwich?

florianz · 06.24.2009, 02:15 AM

Quote:

Originally Posted by zeropointbug

Yikes, is that a green eggs and ham sandwich?

yep, I like a little snack when I am bashing!

zeropointbug · 06.24.2009, 04:04 AM

I'm telling you guys, the truck is running different now with the modded Quark... I forgot how smooth it was before I killed my last one. I can't really explain it, but I am loving it... I think it's more proportional as well.

I was out earlier and had the eagletree plugged in, I had the thermal probe mounted inside the 1512 Neu for temps, and after 10 minutes running in 15C (60F), the motor was at 130F (using live mode in eagletree software.) So I guess it's not that hot, but it was cool out, so when running at the track, it might be 30C(86F) this weekend, so you can add 25*F to that. That's ~155F, now I remember when I had my IR temp gun, that after a full run on 7s2p, the motor was usually between 155F and 165F on a hot day.

I think I should be fine then for this weekend races.

zeropointbug · 06.24.2009, 07:58 PM

Okay, about the LVC in the Quark, I have never acutally used it as I have been using A123's up until now. What does the Quark do when the packs hit LVC?

Does it just shutdown for a second? Reboot?

thanks

ANGRY-ALIEN · 11.05.2009, 01:26 PM

Hey zeropointbug... I'm having some issues with my quark... On start up it cogs a lot and after a 2-5 min run on full throttle it 'shots down' (currently running 5s)...
When it does this I can hear/see it applying the break... it sits for a few seconds before i can get any throttle responds again... Then it runs for a little on 1/3 throttle,
but when I squeeze harder it cuts again. I am not sure if the BEC has anything to do with it because I still have steering when it stops... Is this a thermal case or is it something
else entirely? I'll be doing a heatsink and cap mod soon to see if will help with the problem.

Alien

suicideneil · 11.05.2009, 03:22 PM

Not a bec issue as such, though running an external one always helps with older style escs. Sounds alot more like thermalling- the heat spreaders & thermal tape tend to let go after a while, then there FETs have no way of transfering their heat to the case which is also the heatsink. Cogging sounds more like either a gearing issue (too high maybe?), or just the software perhaps- not sure if its possible to update it without sending it back to Quark.. good luck that one... :/