Digital.Complex: [project] E-Revo Beast Edition - Digital.Complex

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[project] E-Revo Beast Edition

#31 User is offline   aotsukisho 

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Posted 21 January 2013 - 10:06 PM

I've got some capacitors and 6.5mm CC Bullets in the mail. Soon the ERBE will be back! In the meantime, I was thinking of ways of making the XL2 both 4s2p and 8s1p compatible without spending a small fortune in CC Bullets and making a rats nest of adapters. This is what I came up with:

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This way, I can plug in the cap bank when I run 8s and not have two bullets flopping around at full battery voltage. I figured that it won't need extra capacitors when running at 4s since it will have roughly half the internal resistance, twice the number of connectors (half the external resistance) and I will also be running the balance taps during operation to minimize the amount of constructive interference ripple current from side to side.
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#32 User is offline   aotsukisho 

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Posted 25 January 2013 - 10:30 AM

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CC Bullets came in, after an astonishing 2-day turnaround with USPS

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I decased the XL2, and found that it uses the same heatsink as the XL1 (and probably the HV160).

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the fan isn't screwed to the heatsink anymore, it slides into a pocket in the plastic shell.

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the XL2 came with preinstalled 8.0mm CC Bullets. I now have three females laying around in case I need them...

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I pushed out the fan and discovered it used the exact same parts as the XL1

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reusing old parts first

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speaking of reusing, here's the 6.5mm bullets off the XL1 that I'll be reusing

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quick out of order shot of the reassembled shell

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peeled off the bottom decal, as I suspect my adhesives will work better applied straight to the source

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now there's a familiar sight.

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I can reuse the one screwhole.

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mockup in actual placement

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this ferrite choke was a little close to the ESC so I needed to scoot it down some

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that's better

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still got these :mrgreen:

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some brand placement

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ready to solder

I ran out of both time and 8AWG heatshrink last night, so I was only able to finish the ESC. My lipos are half finished but I need to buy more shrink before I can safely test it out. The capacitors are still in the mail, so those will be made into a cap bank as soon as they get here. The difficult part is figuring out where I'm gonna put it...
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#33 User is offline   aotsukisho 

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Posted 30 January 2013 - 10:47 AM

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making the ESC power wire taps

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some difficult soldering later. It took about four minutes of heating before the wire soaked up solder, this included both an iron and my reflower.

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really sticky pads from I think my old Novak ESC that I never used

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mounted once more

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single M3x6mm screw

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batteries in

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and plugged in. It works!

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now, onto the capacitor bank. These are the ones I got from eBay, Panasonic FC series 1000uF 50v.

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a closeup before I get to work

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taking cues from good ol' NiMH pack construction, I glued them together first. Not with Shoe Goo, but regular hotglue.

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I filled in the bottoms pretty good

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the latticework

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slightly modified the lattice once I figured out that a central-mount will yield lower internal resistance than a lipo-style end mount. Once that was done I tested it. Nothing blew up! Hooray!

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after confirming that they work and once again being scared by a gigantic plug-in spark, I potted the leads with hotglue.

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final product.

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I found a good mounting space, but unfortunately it will cover these decals.

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test fitting. I put some electrical tape around the caps to hold them together and give it some form of abrasion resistance.

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another sticky pad from an ESC somewhere

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all mounted up

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and it works.

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another shot of the wire management

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closeup on the XL2

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body on

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she's back!
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#34 User is offline   aotsukisho 

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Posted 01 February 2013 - 09:24 AM

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I did a short run yesterday in between periods of rain. I wasn't able to fully unload it since I was running it on the street in front of my house, but the numbers look promising. Most important at the moment is the ripple current, which is something in the order of 4% of the input voltage. :D
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#35 User is offline   aotsukisho 

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Posted 17 May 2013 - 02:18 PM

I was jumping with the ERBE a couple weeks ago and the rear suspension arm exploded. It was jimmy-rigged so we could keep running it but I figured since I had some recent downtime due to weather I should probably fix it up properly.

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straight from the field. I didn't have a short enough M3 screw on me at the time so an extra long one had to do in a pinch. Apparently from the damage, some part of the wheel/tire comes into contact with the suspension arms, or it could just be the RPM material being ultra flexy to begin with. :S Also, you can see that the screw hole for the middle ride height setting has been torn out, which is exactly what happened

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Fixed with a proper length screw, and I also used another one to secure the loose end. I did this on both sides, hopefully it prevents another disaster since the material on both sides of the ball link mount seem to be threaded. Also, you can tell how old the parts are on this thing since there's no steel ring around the pillow ball mounts. I wonder if they can be retrofitted?

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The ESC tape wasn't strong enough and I found the MXL2 flopping around the chassis after the last time I ran it. I went to Home Depot and bought some 20lb outdoor mounting tape to use instead. If this doesn't hold it on properly, there is also some 50lb tape I could use...
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#36 User is offline   aotsukisho 

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Posted 29 May 2013 - 05:17 PM

I finally got my hands on the Hot Racing double up slipper clutch system. I installed it during an RC-wrenching night, although I am still only using three pads.

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blurry shot of the ERBE. I decided to remove the XL2 since it was the easiest noninvasive way of accessing the clutch

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all the parts out

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weighing the original part

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weighing in the upgraded version. Come to think of it, I should've done these as side by side photos.

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weighing the stock part

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interestingly, the HR one is lighter.

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another shot of the chassis I took for some reason

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all the stuff side by side

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putting a new 40t spur gear on the new clutch assembly

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time to put on the pads

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the pads mounted are the Hot Racing extra long ones, and as you can see you cannot fit six pads while using the extended ones even if the other three are standard length.

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to reset the wear I flipped em over

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and then magically got the bearing in without removing the spur gear that I just put on >_>;;

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back on the input shaft

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ready to go

Also, my new lipos finally came in nearly a week after their ETA. They are slightly better rated than the old set, but gave me a difficult situation...

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25-50C isn't bad, but 35-70C is better

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ready to use em for the first time

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aaaaaand they don't quite fit. Damn you hobbyking. ):
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#37 User is offline   aotsukisho 

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Posted 07 June 2013 - 03:40 PM

I modified the ERBE's chassis to accept these larger lipos, and even with the modifications it's a tight fit.

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cut outs in the chassis and removed those black vent things

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did a minor teardown, inspecting the driveline. a lot of transmission scuffing on the bottom skidplate

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moderate damage to the driveshaft dogbone

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drilled some small 7/32" holes in the chassis to route some zipties through

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did to all corners of the battery

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bottom view

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so I could use some RC Monster battery tiedown straps that I got a few years ago

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everything mounted nicely and zipties trimmed

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it looks nearly the same...not

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view from the other side

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shot with the body on after the mod.
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#38 User is offline   aotsukisho 

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Posted 10 June 2013 - 11:23 AM

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did a heavy run this weekend, and an hour into the day I run into this

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the wheel nut had came off and more or less seized right here. Not knowing that it was stuck, I grabbed it to loosen it and it burned the shit out of my finger.

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the wheel itself melted, the inside is stripped of course.

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doesn't quite fit onto the hex anymore.

for now I'm using my truggy tires on the E-Revo, I'm looking around for a set of good monster truck tires to replace the HPI ones.
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