Search found 841 matches

by Ohbse
Aug 12 2014 10:13pm
Forum: E-Bike General Discussion
Topic: Descendence bikes open-source electric bike frame
Replies: 292
Views: 34503

Re: Descendence bikes open-source electric bike frame

Yes please - would love to have a play. I'm not even on the same plane of existence regarding geometry or the ins and outs of frame building, just hoping to expand my knowledge and hopefully contribute something worthwhile :) One thing noted in the development of the Raptor frames etc is that 150mm ...
by Ohbse
Aug 12 2014 9:35pm
Forum: E-Bike General Discussion
Topic: Descendence bikes open-source electric bike frame
Replies: 292
Views: 34503

Re: Descendence bikes open-source electric bike frame

iv been rethinking the aesthetics a bit cause i love the look of them other ones i posted- i sketched this up on the old puter as a prelim to a cad model- 3kw ebike - Concentric v2.JPG gives you the general idea of what im thinkin...what you all think? the cells shown on it are 38120s cells for a 7...
by Ohbse
Aug 12 2014 9:21pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Another 4Motus Überbike build
Replies: 43
Views: 7557

Re: Another 4Motus Überbike build

Very interested to see how this progresses, please keep us up to date!
by Ohbse
Aug 12 2014 5:56am
Forum: E-Bike General Discussion
Topic: Descendence bikes open-source electric bike frame
Replies: 292
Views: 34503

Re: Descendence bikes open-source electric bike frame

This is an exciting prospect and is of huge personal interest.. the basic specifications you've described are exactly what I'm looking for in a custom frame. Personally my favourite of the currently available commercial frames is the 4motus based primarily on styling, however I've had reservations t...
by Ohbse
Aug 03 2014 6:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: ML DH Comp Cromotor Max-e Build
Replies: 30
Views: 8517

Re: ML DH Comp Cromotor Max-e Build

Weird - this is virtually identical to the build that I'm starting shortly! Hopefully the fact that we arrived at basically an identical spec list means convergent evolution is finding the best bang for buck :)
by Ohbse
Jul 29 2014 5:41pm
Forum: E-Bike Technical
Topic: How to fix or prevent wire cut with Crystalyte HS35 motor
Replies: 45
Views: 15082

Re: How to fix or prevent wire cut with Crystalyte HS35 moto

I removed the plastic hood and the seal on mine and tossed them. ~3000km later and inside looks like new still. My suspicion is it would actually look worse with the seal in place as water would inevitably still get in, but have no way to escape. A properly sealed motor would perhaps be a good thing...
by Ohbse
Jul 24 2014 11:30pm
Forum: E-Bike General Discussion
Topic: Noobie planning an Electric bike with >30 mph
Replies: 165
Views: 19033

Re: Noobie planning an Electric bike with >30 mph

Unless you need more power than one motor can provide, or the accompanying factors with one powerful motor (single heavy axle etc) are not workable for whatever reason then I believe a much more simple single motor, rear driven setup is best for cost, complexity and predictability reasons. A cromoto...
by Ohbse
Jul 24 2014 10:42pm
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1589
Views: 247465

Re: The most advanced Adaptto Mini-E Controller + BMS

22s is best. Above 92v current is reduced progressively, so I don't think you would see much benefit by going higher.

And yes - these things are awesome.
by Ohbse
Jul 24 2014 9:59pm
Forum: E-Bike General Discussion
Topic: Noobie planning an Electric bike with >30 mph
Replies: 165
Views: 19033

Re: Noobie planning an Electric bike with >30 mph

To achieve your stated goals affordably using the minimum amount of parts that are actually available for not ridiculous money: ~5kw, 20km range Crystalyte H40 Direct drive hub, rear wheel drive. Ventilate covers to deal with heat. Dual beefy torque arms. Adaptto mini-e. Set for 60a battery, make su...
by Ohbse
Jul 23 2014 9:24pm
Forum: E-Bike Technical
Topic: What tire can cope the ebike punishment?
Replies: 25
Views: 2764

Re: What tire can cope the ebike punishment?

I'm running 26x2.5" Hookworms with Maxxis downhill 2.5" tubes. ~2500km's and have smashed through some BIG potholes at 35mph many times. Glass, thorns and gravel - zero punctures.
by Ohbse
Jul 17 2014 5:50pm
Forum: Items for Sale - New
Topic: Replacement motor axles
Replies: 83
Views: 11592

Re: Replacement motor axles

Does the Cromotor really need a replacement axle? My understanding was it would take some pretty serious forces to damage one as they're significantly more beefy. On the other hand my HS3540 axle is made of cheese and has lateral movement that occasionally results in the hall sensors leads rubbing o...
by Ohbse
Jul 16 2014 4:37pm
Forum: E-Bike General Discussion
Topic: A Collection of Power Supplies and Charging Solutions
Replies: 46
Views: 13368

Re: A Collection of Power Supplies and Charging Solutions

By the time I was investing the time to parallel harness that many batts, I'd do series/parallel and take full advantage of the charger... You hit the problem again @ anything>4s though and that's what pisses me off as someone who owns two of the damned things. They should be internally isolated so...
by Ohbse
Jul 15 2014 11:47pm
Forum: Large EV General Discussion
Topic: BMW i3-MiscInfo+DetailedReviewByVoltOwner(WhyBuyA Volt?!)
Replies: 14
Views: 1479

Re: BMW i3-MiscInfo+DetailedReviewByVoltOwner(WhyBuyA Volt?!

You're right on the warranty issues - however $12-14k buys quite a lot of Leaf technician time if ever required. Frankly I would take punt and hope for no issues inside of the 3 year period, then swim in a pile of money. If I could drive a leaf with a straight face. They're only ~$42k RRP because ap...
by Ohbse
Jul 15 2014 9:17pm
Forum: E-Bike General Discussion
Topic: A Collection of Power Supplies and Charging Solutions
Replies: 46
Views: 13368

Re: A Collection of Power Supplies and Charging Solutions

Guys - for those in the UK (and maybe elsewhere) HERE is a source for 2x brand new 2KW units very similar (but more powerful) than the ones that I bought. Not quite as cheap at ~$60USD, but still very affordable for a top notch PSU.
by Ohbse
Jul 15 2014 9:04pm
Forum: E-Bike General Discussion
Topic: A Collection of Power Supplies and Charging Solutions
Replies: 46
Views: 13368

Re: A Collection of Power Supplies and Charging Solutions

....I have updated to two Lineage Power CP1800AC52 PSU's that I bought for $24 USD each Ohh :shock: nice , useful power supply. did you source those locally, or luck into a USA Ebay sale ? Ebay :) Brand new, but missing their plastic facias. Shipping them to NZ cost me double their purchase price, ...
by Ohbse
Jul 15 2014 8:54pm
Forum: Large EV General Discussion
Topic: BMW i3-MiscInfo+DetailedReviewByVoltOwner(WhyBuyA Volt?!)
Replies: 14
Views: 1479

Re: BMW i3-MiscInfo+DetailedReviewByVoltOwner(WhyBuyA Volt?!

I can purchase virtually a new japanese import Leaf in NZ for ~28k AUD on the road, however it still makes very little sense to replace my existing (and much nicer to drive) conventional petrol powered toyota. The savings just can't justify the upfront cost. Petrol really needs to double in price. 2...
by Ohbse
Jul 14 2014 6:33pm
Forum: E-Bike General Discussion
Topic: A Collection of Power Supplies and Charging Solutions
Replies: 46
Views: 13368

Re: A Collection of Power Supplies and Charging Solutions

When I first got into this I did a lot of reading. I too run bricks of 4s hardcase turnigy lipo, but in a 20s/10ah configuration. I ended up skipping a lot of the smaller stuff and went straight to a Powerlab 8 and have found it for the most part to be excellent. What I really hate is having to reco...
by Ohbse
Jul 09 2014 11:36pm
Forum: E-Bike Technical
Topic: Adaptto Mini-E/Max-E Owner's Thread
Replies: 5146
Views: 603746

Re: Adaptto Mini-E/Max-E Owner's Thread

I'm quite familiar with the insides as I had previously repaired mine with guidance from Adaptto after my shitty motor shorted out hall sensors to the cover. Thankfully this blew a protective resistor rather than anything complicated, that particular repair was very easy and cheap. This time round A...
by Ohbse
Jul 09 2014 8:59pm
Forum: E-Bike Technical
Topic: Adaptto Mini-E/Max-E Owner's Thread
Replies: 5146
Views: 603746

Re: Adaptto Mini-E/Max-E Owner's Thread

On topic, my mini-e failed on the way home a couple of weeks ago - blown FET/phase :( Happened during wet weather and seems likely to be related to water ingress, Adaptto have been very helpful and communicative in arranging to have it shipped back for diagnosis and repair, unfortunately I have not ...
by Ohbse
Jul 09 2014 7:09pm
Forum: E-Vehicles General Discussion
Topic: Long Distance Ebike Design
Replies: 69
Views: 11844

Re: Long Distance Ebike Design

Another alternative would be to build up one of the many 'monocoque' style frames, for example Stealth Bomber, Chaika, 4motus, Raptor etc. Some of these frames can fit *lots* of wh onboard without resorting to any external storage. The 4motus frame in the 'narrow' variety can hold 3kwh+ of high powe...
by Ohbse
Jul 08 2014 9:49pm
Forum: E-Bike Technical
Topic: FIXED Cromotor v2 RUB, MAGNETS came UNGLUED!
Replies: 124
Views: 13179

Re: Cromotor v2 noise, help! UPDATE with MOTOR pictures DAMA

I'm surprised a lot of you are thinking all those crack marks are normal. One side doesn't have any at all, and the other side has so many of them. That's precisely why I suspect that the cracks aren't all that serious and probably aren't contributing to your clearance issues. That type of cracking...
by Ohbse
Jul 07 2014 10:45pm
Forum: E-Bike Technical
Topic: FIXED Cromotor v2 RUB, MAGNETS came UNGLUED!
Replies: 124
Views: 13179

Re: Cromotor v2 noise, help! UPDATE with MOTOR pictures DAMA

How do the bearings feel? Remove bearing from the axle, press into the side cover. Use your finger as an axle and spin the cover. Any vibrations? High spots? lateral movement? How long does the cover take to spin down? Can you deflect the inner race compared to the outer race? To give you an idea, t...
by Ohbse
Jul 07 2014 8:27pm
Forum: E-Bike Technical
Topic: FIXED Cromotor v2 RUB, MAGNETS came UNGLUED!
Replies: 124
Views: 13179

Re: Cromotor v2 noise, help! UPDATE with MOTOR pictures DAMA

What are the bearings like? Without seeing in person I can't say for certain, but my guess is that those side cover cracks are actually not overly structural. The casting is not amazing but should still be more than strong enough. If your bearing has partially seized and spun in its seat this could ...
by Ohbse
Jul 06 2014 11:02pm
Forum: E-Bike Technical
Topic: FIXED Cromotor v2 RUB, MAGNETS came UNGLUED!
Replies: 124
Views: 13179

Re: Cromotor v2 grinding noise, help!

Just pull it apart already! Sounds like you've definitely got mechanical issues if with everything disconnected you're still finding it difficult to turn by hand. You're only going to do more damage by continuing to ride with it hurt.
by Ohbse
Jun 30 2014 11:49pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: jonescg's NEW electric racebike BUILD thread!
Replies: 1267
Views: 210081

Re: jonescg's NEW electric racebike BUILD thread!

Chris - congratulations! Awesome machine and a supreme effort that has paid off in some dominating wins :D Out of interest, how much current are you pulling to achieve the 140kw figure? Where to from here as far as power production? I presume you're at some hard limits of the controller, given that ...