Search found 3006 matches

by Sunder
Feb 15 2021 4:39pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Man, I wish I had time to work on my own bike, let alone comment on yours. Been doing 12 hour days 5 days a week and 6 hour days on weekends. Once I fall behind in keeping up with your posts, it's even harder to make the time to catch up. Sorry man, it's not a lack of interest. It's a lack of time. ...
by Sunder
Feb 05 2021 12:03am
Forum: Battery Technology
Topic: BIFRC Spot Welder Uprated Voltage.
Replies: 2
Views: 118

Re: BIFRC Spot Welder Uprated Voltage.

Thanks Amberwolf. I'm wondering if 12.6v was used because it's 3S x 4.2v (Fully charged LiPo). and 7.0v, because it's 2S x 3.5v (flat LiPo) There's no SMPS circuitry there that I can see. However, there is some kind of microcontroller that detects a short (so it can start the weld without a trigger ...
by Sunder
Feb 03 2021 8:44pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Solar panel still have a pretty long payback period for good quality ones. Cheap ones can be fire risks, and their performance drops pretty fast after a year or two. Due to a pretty hefty government subsidy, I could either install a $6k Chinese system, which after subsidy was down to $1k, or a $14k ...
by Sunder
Feb 03 2021 7:04pm
Forum: Battery Technology
Topic: BIFRC Spot Welder Uprated Voltage.
Replies: 2
Views: 118

BIFRC Spot Welder Uprated Voltage.

Hi All, Right before Covid, I bought a spot welder identical to this: https://www.reddit.com/r/18650masterrace/comments/evvs44/bifrc_spot_welder_from_aliexpressebay/ But as I was bogged down with work, and working from home under covid lockdown, I never had a chance to assemble it or use it. I'm fin...
by Sunder
Jan 26 2021 4:43pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Have you given any more thoughts about one of those 12v spot welders? Probably about the same price as a new iron. You have the battery packs capable of running them. Even if you didn't want to spot weld packs together, you can spot weld nickel tabs onto each cell, then solder the tabs. It will be a...
by Sunder
Jan 21 2021 5:24pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Those QS273 are capable of well more than 10kw out the factory floor. (There are also different models with different rating too.) I bought thr 8kw model and had intended to limit it at 16kw constant and 24kw 5 second short burst. I've heard of others getting over 30kw out of them reliably with just...
by Sunder
Jan 19 2021 4:09pm
Forum: EBike General Discussion
Topic: How much battery capacity is lost annually?
Replies: 11
Views: 499

Re: How much battery capacity is lost annually?

It all depends on how you treat the battery. - Depth of discharge, do you use 5Ah of a 15Ah battery or do you use it all. - Charge rate, 1A charge or 10A charge - Do you use battery in the cold - How battery are stored, temperature and voltage - The biggest aspect is how many amps are you pulling f...
by Sunder
Jan 15 2021 9:40pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

You need to learn how to do a linesman's splice to join two wires together. Even though your wire wrap is neat, once soldered, all the force if you pull on rhe wire is then on the solder and eventually you can get a bad join. A linesman's splice puts the stress on the wire itself, and it has been pr...
by Sunder
Jan 11 2021 5:10pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Don't forget most of LC's builds have two chains - The normal crank to rear gear one, and the motor to the wheel drive one. The motor driven chain could probably be an up-rated chain without rubbing on anything. In fact, good chance he could design it to be a belt drive without needing a split frame...
by Sunder
Jan 08 2021 12:43am
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Well, it ain't your muscle mass that's lacking. I'd be looking at your diet. Politics ain't easy when the nation is divided as the US is now, and Australia is heading that way. It used to be we'd have a lot of centrists and middle left/middle right. The left recognised that we don't have endless pil...
by Sunder
Jan 06 2021 7:07am
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

I need to lose > 30 pounds but is impossible due to my slow metabolism. It really sucks. Unless you have hypothyroidism, or your body temperature is abnormally low, slow metabolism means only one thing - You don't have enough muscle mass compared to how much you eat. There's really no other explana...
by Sunder
Jan 05 2021 7:37am
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Not impossible, but as others have said, I suspect there was a fair bit of artistic license in that video. The whole thing smells of a set up. Dad does it first off camera, gets the clicks using the son "oh wow child genius!". Not sure how he's still alive after breaking a couple front for...
by Sunder
Jan 04 2021 5:40pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Good luck fitting that to a normal bike without a fair bit of engineering the dropouts and frame... not to mention the size of battery that could both get the performance out of it and have a decent life. Thought the Greyborgs could do more than 6kw too, maybe it's a different model or under rated. ...
by Sunder
Jan 02 2021 7:50am
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Not that familiar with US geography, but I thought Florida was really hot all year round. Didn't know it was flat. One of the few places in the US I have an interest in going is Boulder, Colorado. Years ago, I bought a book called "The cyclist's bucket list". Boulder was my number one in t...
by Sunder
Jan 02 2021 3:40am
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

That is one thing I do not understand about DC motors and how they function. Is current a constant by design ? I know RPMs change according to voltage and watts also change by voltage but what about rated current and max. current. Current is not constant in a dc brushless motor. Conservation of ene...
by Sunder
Dec 30 2020 9:13pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

latecurtis wrote:
Dec 30 2020 9:03pm

I do see a spot on the cell that got damaged. Not sure if it was me. The arrow on the bottom points to it.
Tape over it. The metal case on some 18650s is negative. Might or might not be on this one, but you don't want to risk shorting it there.
by Sunder
Dec 30 2020 8:29pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

I may have missed the context of when you ordered these, but they are obviously for a specific application. See the photo of the numbers with the grille just above those? In between each gap is a metal contact. They make it that way so the contact can't short in a toolbox or something, and the grill...
by Sunder
Dec 30 2020 8:18pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

I was in the process of switching them to Zipp 302 carbon deep V wheels Plastic toy bike parts are for playing around, not getting to work. If your need for transportation is serious, be serious. https://i.kym-cdn.com/photos/images/newsfeed/000/538/731/0fc.gif I just had more dollars than sense. I ...
by Sunder
Dec 29 2020 4:53pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

I am worried about SUNDER. Have not heard from him for awhile now. Hey mate, thanks for caring. I actually came off my motorbike (still petrol) at speed without protective gear on. (Except the mandated helmet - it's pretty rare I ride without at least a jacket, though I usually go without kevlar je...
by Sunder
Nov 09 2020 9:01pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

You need to get it together and start riding! Wish I was in someplace where the weather is warm, I'd be out riding every single day. I'd be seeing granola's with turtle necks and fleece and I'd be shirtless. You know what? You're right. I've let my bike sit too long unfinished because I have nowher...
by Sunder
Nov 05 2020 5:57pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Not really had time to read through your thread lately, and not sure what you asked me to respond to. But to charge the car from inside, you're on the right track. Find a place to wire up a connector that doesn't require ignition to be on. Get a voltage regulator that will do 14.8v @ 9A (a bit of he...
by Sunder
Nov 03 2020 6:26pm
Forum: EBike General Discussion
Topic: The downside of more electric bikes
Replies: 32
Views: 1155

Re: The downside of more electric bikes

Good to see a variety of feedback from people, and that the movement is worldwide. For Sydney, heaps of the new riders are just food delivery, but still a sizeable chunk I see are commuters. People who can't afford to drive into the city but don't want to risk public transport. I did find an old mem...
by Sunder
Nov 01 2020 7:03am
Forum: EBike General Discussion
Topic: The downside of more electric bikes
Replies: 32
Views: 1155

The downside of more electric bikes

I didn't think there would be one. More parts, greater general acceptance, used bikes to buy and modify, etc. At worst, I thought if they were mostly home made, one or two incidents would cause police to start cracking down on the obvious duct tape bikes. But since Covid, almost all increases are fa...
by Sunder
Oct 16 2020 8:26pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6605
Views: 533966

Re: new eZip motor

Hi LC, goos to see your projects advancing. I've been out of action on work projects for a bit, so haven't contributed. Bit of reading to catch up, but it seems like you are having some successes, even if you are also having some frustrations. Good luck with the projects. I should be here a bit more...
by Sunder
Aug 31 2020 6:03pm
Forum: EBike General Discussion
Topic: What will it take to make ebikes, More mainstream ?
Replies: 173
Views: 16204

Re: What will it take to make ebikes, More mainstream ?

I suspect that it's similar in some other cities around the world, but here in Sydney, a full day of parking is around $80, lower in the more residential parts of the city, and higher in the retail and financial parts of the city. The minimum wage is about $20, so after tax a minimum wage earner, if...