Search found 1089 matches

by ZOMGVTEK
Sep 17 2013 5:46pm
Forum: E-Bike Reviews & Testing
Topic: Farfle swing arm broken!
Replies: 35
Views: 5339

Re: Farfle swing arm broken!

I have a farfle swingarm, running whatever my aging 20C Turnigy packs put out, which is generally something over 15kW on a good day. No axle nuts and the steel is holding fine so far. I have yet to notice any axle movement when going from WOT to about 3.5kW regen, which is really harsh stuff. Thats ...
by ZOMGVTEK
May 24 2013 7:36pm
Forum: Battery Technology
Topic: Getting cozy with LiPo
Replies: 13
Views: 961

Re: Getting cozy with LiPo

Resting.

If the loads are sane don't pay much attention to what voltage the cell is at while loaded, from a cell perspective. Obviously the IR needs to otherwise be accounted for electrically.
by ZOMGVTEK
Apr 25 2013 10:21pm
Forum: E-Bike Technical
Topic: To fuse or not to fuse?
Replies: 14
Views: 1079

Re: To fuse or not to fuse?

Most commonly, a fuse is used to protect wiring. If the controller has a fault that causes the fuse to pop, it most likely has a big problem and is toast anyways. No fuse would simply allow the fault to correct itself, typically by going up in smoke. Lets say you are using the fuse to 'protect the c...
by ZOMGVTEK
Apr 25 2013 10:00pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

I managed to dump the bike at something like 20 a few days ago. Apparently one hand on the bars is not terribly sufficient with a bit of unintended throttle. I'm mostly fine and the bikes fine. Just burned a hole in jeans and a shirt, a little road rash and an ankle injury. I'll be fine in a few day...
by ZOMGVTEK
Apr 09 2013 8:24pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

It was never really the plan, it just ended up like that. I've repaired most of the controllers without fuss. A lot of failures were really 'soft' and I often only replaced the FET's that shorted. My current 12 FET LYEN has most of its original MOSFETs. No matching or anything special, just some snu...
by ZOMGVTEK
Apr 09 2013 1:15pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

Zomgvtek, is there a possibility that you have the max throttle v set too high. That could possibly exacerbate the delay. Its strange that so far you are the only one reporting it as a major issue. I can feel it on mine when I'm looking for it but its really tiny and not a safety concern at all on ...
by ZOMGVTEK
Apr 09 2013 12:03pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

I do a lot of stupid things with the bike, all the time. The throttle sticking on, even for a relatively brief period, is a very bad thing. Sure, I could grab the switched brake lever, but that would turn regen on, which given my very high regen power, can be just as bad as unintended acceleration i...
by ZOMGVTEK
Apr 09 2013 8:33am
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

If I roll off the throttle it's fine, but I'm not a big fan of the fact that the throttle 'sticks' on for a bit should I need to snap off. However I have the board configured, even with all filtering 'off', it feels like the throttle input gets lost for a brief period, and it sticks on when I snap o...
by ZOMGVTEK
Apr 08 2013 6:26pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

It's most noticeable to me I slam the throttle on from a stop, get up to 20, and snap it off. I continue to accelerate at full throttle (or nearly) for what feels like about .2 seconds. It's very repeatable and I consider it to be very noticeable. As long as you can easily feel the bike accelerating...
by ZOMGVTEK
Apr 08 2013 12:04pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

The delay is BY FAR the most noticeable on my bike when accelerating at full throttle then slamming off while the bike is still pulling. It's been extremely noticeable 100% of the time I do this.

Certainly would be nice to have another opinion on this delay.
by ZOMGVTEK
Apr 06 2013 3:21pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

I almost dumped the bike twice while doing rolling heaters. The throttle sticking WOT is a bit more of an issue than I initially assumed, even if its only 120ms or so.
by ZOMGVTEK
Apr 06 2013 10:41am
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

You might need to put a big yellow sheet in there that says RTFM. I assumed no documentation would be included, and ended up ripping the instructions in half opening the mailer. That certainly didn't help my odds of reading it. Little arrows with +'s on the silkscreen might be a reasonable idea if y...
by ZOMGVTEK
Apr 05 2013 11:04pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

Turns out the instructions are somewhat useful and fairly comprehensive. I have the min and max voltage set about 1/8 turn away from ideal. 26" 5404, a little over 100A @ 24S LiCo. I set the two adjustments to the minimum an it appears to be quite responsive. I should be able to mess around with it ...
by ZOMGVTEK
Apr 04 2013 7:00pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

I have about 10 minutes of seat time with this installed. No adjustments were made aside from initial min/max throttle voltage. It's about 30ºF outside, so its not the best conditions to be going 50. I will be doing a more detailed review when I get everything dialed in, but this is just my initial ...
by ZOMGVTEK
Apr 04 2013 5:27pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

Image

It should be on the bike in a little bit.
by ZOMGVTEK
Apr 02 2013 10:12pm
Forum: E-Bike Technical
Topic: building my own bike light budget $50
Replies: 32
Views: 2316

Re: building my own bike light budget $50

I would just swing for the 100W LED arrays at that point. They're about $15 and are capable of reasonable light output. You absolutely need a big heatsink with airflow, but they don't put off all that much heat if you drive them at something like 50W. Straight passive will end poorly unless the heat...
by ZOMGVTEK
Mar 30 2013 4:01pm
Forum: Battery Technology
Topic: High Lipo voltage sag and when to stop using batteries?
Replies: 8
Views: 1383

Re: High Lipo voltage sag and when to stop using batteries?

I have 3 year old 20C Turnigy cells that I run around 20C regularly, charge at 2C, and didn't balance in a year. I get about 5V sag at WOT when the pack is cold. They still deliver 4.4-4.5AH, but the IR is a bit higher than new cells.
by ZOMGVTEK
Mar 30 2013 12:21am
Forum: Battery Technology
Topic: Safe, Reliable,100V+ Battery Switch + Precharge +
Replies: 7
Views: 607

Re: Safer, Reliable, 100V+, Precharge plus.

Another option is to simply never disconnect the pack. I didn't disconnect mine in at least a year. I have precharge, and dual main leads. One can be used to discharge while one charges, they both go the same place.

I also consider my 10 gauge wire to be the fuse, so my opinion might not be relevant.
by ZOMGVTEK
Mar 29 2013 7:14pm
Forum: E-Bike Technical
Topic: Throttle interface for sensitive high power setups
Replies: 224
Views: 25187

Re: Throttle interface for sensitive high power setups

As long as its not snowing, I'll have it on the bike the day it shows up. I keep blowing controllers up, so it's only going to be on a 12 FET on the extreme edge. It won't do power wheelies, so I don't know how big of a help it will be just yet. Pots to dial out the slop in both ends might be cool. ...
by ZOMGVTEK
Mar 20 2013 5:40pm
Forum: Battery Technology
Topic: 100v dc volt monitor??
Replies: 8
Views: 432

Re: 100v dc volt monitor??

Avoid having anything attached to any battery for storage. You can probably tolerate a uA or so, but most any meter is going to take a few orders a magnitude more and should not be left attached. That eBay meter claims 15-20mA consumption, which would not be noticeable while using the bike. For stor...
by ZOMGVTEK
Mar 20 2013 5:26pm
Forum: Battery Technology
Topic: For how long do you store your full LiPo?
Replies: 5
Views: 517

Re: For how long do you store your full LiPo?

I charge my bike before any longer use. If I'm just going around the block whatever its sitting at is fine, but its usually never sitting below 3.7V/cell. It sits at whatever it ends up being when I get back. I prefer to have a higher power charger and usually have the pack sit something around 50% ...
by ZOMGVTEK
Mar 19 2013 9:36pm
Forum: E-Bike General Discussion
Topic: TorqArmRev4 failure
Replies: 44
Views: 3225

Re: TorqArmRev4 failure

Regen is a big deal if you ask me. I almost never use friction braking. I think I'm running something like 4kW regen, which happens to be right about the point where the rear tire is at about 80% of its capabilities under normal circumstances. Over a small bump or a little grit on the road and it bo...
by ZOMGVTEK
Mar 19 2013 9:32pm
Forum: E-Bike General Discussion
Topic: 6s charger with a colour 4.3" touch screen $89
Replies: 4
Views: 308

Re: 6s charger with a colour 4.3" touch screen $89

I'll hold out for the 4kW 32S version.