Search found 77 matches

by ossivirt
Jul 02 2020 1:53pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

I would like to ask users of kWeld, how is the status of heat, working temperature? I do not see any sink heaters, or fan? Thanks for answers... Never had any issues with the unit itself. Electrodes on the other hand get too hot to handle without gloves if pulse energy and time between welds dont a...
by ossivirt
Jun 27 2020 3:48pm
Forum: E-Bike General Discussion
Topic: Stealth Bomber type electric enduro purchase
Replies: 71
Views: 1580

Re: Stealth Bomber type electric enduro purchase

I have a EEB frame on order and suspension and other bits. But the drive train is still up in their air I'm doing as much research as possible before deciding on a Qs205, qs273 or a mid drive. I have EEB frame too. It can take mid-drive but its really meant for hubs. 205 is good for up to 12 to eve...
by ossivirt
Jun 27 2020 3:28pm
Forum: E-Bike General Discussion
Topic: Stealth Bomber type electric enduro purchase
Replies: 71
Views: 1580

Re: Stealth Bomber type electric enduro purchase

Some reason I get the feeling people don’t like it that I’m happy about my purchase lol There is always hub vs mid-drive argument going on somewhere.. Both have their good and bad features and every person has their own preference based on their experience and usage. This kind of bike is not lighte...
by ossivirt
Jun 21 2020 1:13am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

Would the resistance reading after a spot weld be a good proxy for the resistance of the material being welded (assuming the strips are identical in size and are being spot welded to the exact same battery)? I had success in spot welding two different materials (SigmaCLAD and “Nickle Silver”) using...
by ossivirt
May 23 2020 5:03pm
Forum: Large EV General Discussion
Topic: 2m diameter wheel inflatable car-ish build!
Replies: 11
Views: 2735

Re: 2m diameter wheel inflatable car-ish build!

Original vehicle according to video weighs 119kg. Not sure if its with or without batteries. Some of it can be reduced but assuming its 2 person vehicle (It would be nice to go to lake with friend) -10 or 20kg don't matter that much and anything more seems unrealistic with cheap materials and hoverb...
by ossivirt
May 23 2020 3:56pm
Forum: Large EV General Discussion
Topic: 2m diameter wheel inflatable car-ish build!
Replies: 11
Views: 2735

Re: 2m diameter wheel inflatable car-ish build!

Wheel diameter and voltage are something that could be easily changed. Rewinding 4 motors seems like lot of work and something that I have not done before. Could I get 2 or 3 times torque out of rewound motor like from gear reduction? (at same phase amps) Probably not. 1.5m wheel diameter is still h...
by ossivirt
May 23 2020 10:51am
Forum: Large EV General Discussion
Topic: 2m diameter wheel inflatable car-ish build!
Replies: 11
Views: 2735

Re: 2m diameter wheel inflatable car-ish build!

First of all. Old thread but Amazing project! I have been thinking for awhile to built vehicle like this. Biggest concern of mine is how the wheels will last and how expensive those will be to build (some pvc fabrics that I looked at 600-900g/m2 were +500€ for the required 2.5x20m piece to cut 8x2.5...
by ossivirt
May 07 2020 12:50pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 99
Views: 9842

Re: KTM 200 exc goes electric

I was just thinking why you have different experiences with the same chain and motor/controller. Maybe it just has to do with most likely little different gearing ratios. Atv could have smaler wheelsize so at same "ground" speed chain travels faster and with less torque/stress. Or maybe motor sproke...
by ossivirt
Apr 28 2020 4:38am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

I quess it would be neat for storage to disconnect it but since it leaves electrodes and battery leads still hanging there its not that big deal. And making plugs for high power wires is more expensive and reduces performance :roll: Or you can just make nice box/case for it that has place for welder...
by ossivirt
Apr 26 2020 1:19pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Another "stealth bomber" build.
Replies: 124
Views: 17975

Re: Another "stealth bomber" build.

So any thoughts to my question about the mount? Hard to say. Even small changes to suspension geometry can have big difference how it will feel/work. I have eeb enduro frame and suspension always felt like there is way too much weight for suspension to handle. I moved the shock just 1.5cm away from...
by ossivirt
Apr 24 2020 5:25pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

I've been working through this thread reading up on the unit and will be ordering one, probably next week, but I have one question that I haven't really seen the answer to. Is the 'kSupply' able to be used to run the kWeld instead of using a battery pack, or is it just meant to charge/power the kCa...
by ossivirt
Apr 11 2020 2:54pm
Forum: E-Bike General Discussion
Topic: Another Stealth bomber (clone) build
Replies: 287
Views: 43579

Re: Another Stealth bomber (clone) build

I think its better option than under swingarm but I also am not an engineer. I have been watching your progress and it seems like you are skilled fabricator so I would like to point out one other possible way to do it. Mout the motor "inside" swingarm or kinda build your swingarm around the motor so...
by ossivirt
Mar 27 2020 12:32pm
Forum: E-Bike Technical
Topic: Is this a QS 205 motor?
Replies: 14
Views: 374

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

Audisport09 wrote:
Mar 27 2020 12:23pm
No?? Does it look off?
I am no expert. To my eye it looks just like qs motor with different label.
by ossivirt
Mar 27 2020 12:07pm
Forum: E-Bike Technical
Topic: Is this a QS 205 motor?
Replies: 14
Views: 374

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

It sure looks like qs made it. :roll:
by ossivirt
Mar 27 2020 11:06am
Forum: E-Bike Technical
Topic: Is this a QS 205 motor?
Replies: 14
Views: 374

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

Audisport09 wrote:
Mar 27 2020 11:01am
Anyone, no one? Is it common to have a QS motor that is not labelled? Seller says all there QS motor are all marked with their own logo NC
Your link is broken atm so no way to be sure. What I know is that they do make motors with customer logos etc so it could be made by qs..
by ossivirt
Jan 26 2020 4:05am
Forum: E-Bike General Discussion
Topic: Another Stealth bomber (clone) build
Replies: 287
Views: 43579

Re: Another Stealth bomber (clone) build

Hi shortcircuit911 It's been long time since and I feel sorry for what happen to your bike and hope you will be back with your bike. I ordred the DNM USD 8 for ½ years ago at EM3EV but didnt have time to assemble it. Now I'm starting to assemble the forks on it, but it looks so wrong. Just checked ...
by ossivirt
Jan 26 2020 3:38am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1347
Views: 272033

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

https://sc02.alicdn.com/kf/HTB1I2vHiRjTBKNjSZFN761sFXXat/202837003/HTB1I2vHiRjTBKNjSZFN761sFXXat.png 3. Package For front & rear wheel, we will new carton package 57*57*25cm for each (no need wooden support now). From qs site. This is how they sent motor with laced rim. I got mine 2years ago like t...
by ossivirt
Jan 21 2020 3:37am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

Silly question but has anyone made up their own supply pack for their kweld using 18650s? Will likely use a ~65AH car battery most of the time but it would be great to use them for a more portable setup. On another note, drew this electrode holder up for anyone that may find it useful, shaped to be...
by ossivirt
Jan 18 2020 8:25pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

I'm set to 1000 amps...I think. =) That can't be adjusted, it's always the short circuit current that just happens. To check the actual reading, keep the foot pedal down after a weld. OK...what's the setting in the welder do? There's a setting for amps in there. Welder has setting to abort weldingp...
by ossivirt
Jan 16 2020 4:12am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

I welded 5 batteries with it in the last hour and I did around 4200 pulses at 10J which used 37Wh from a 2S 10Ah 130C graphene lipo. The electrodes didn't go past 45C with a rate of around 70 welds a minute, the lipo was around 30C, the 8AWG cables and terminals were around 35C, the mosfets were ar...
by ossivirt
Jan 13 2020 12:02am
Forum: E-Bike Build Threads / Photos & Video
Topic: Noob EEB Enduro Build
Replies: 90
Views: 10969

Re: Noob EEB Enduro Build

That style of brake rotor is very thick and makes it even harder to make wires fit. I took the "easy" way out and run my setup without real rear brake and have variable regen on rear brake lever. Most part its just like normal brake but it has just a little lag and it cuts out if battery is full and...
by ossivirt
Jan 05 2020 12:01pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

Searching a bit more I discovered the exact unit in the picture posted by flashtel: On eBay. https://www.ebay.com/itm/Integrated-Hand-held-Spot-Welding-Pen-Spot-Welder-Automatic-trigger-Home-Use-DIY/402009868337?hash=item5d99a7c831:m:mdHw1HlIH_Ejthcn_yxsq2g They even have 3 colors to choose from. I...
by ossivirt
Dec 27 2019 4:08am
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 272
Views: 55711

Re: Spot Welding Copper Strips to 18650 Battery Cells

Is anybody selling .10 Copper strip to spot weld fuse with Nickle, sold in roll for like the Nickel is? Or must you cut your own? Lastly, anyone have any experience with Nickel plated copper for serial connections? Does is spot weld just as well as the Nickel Does? I have not seen anything that is ...
by ossivirt
Dec 26 2019 8:26am
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 272
Views: 55711

Re: Spot Welding Copper Strips to 18650 Battery Cells

Is anybody selling .10 Copper strip to spot weld fuse with Nickle, sold in roll for like the Nickel is? Or must you cut your own? Lastly, anyone have any experience with Nickel plated copper for serial connections? Does is spot weld just as well as the Nickel Does? I have not seen anything that is ...
by ossivirt
Nov 19 2019 1:25pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1169
Views: 161340

Re: kWeld - "Next level" DIY battery spot welder

For average user high c-rate lipo in 3-4s is ok. Or if you don't have one you can take battery out of your car. You cant drive it anyway when welding :lol: I don't have clue how many welds 3s 5ah pack can do but when it is "empty" you can just take little recharge break.. BTW: If I use lipo with kwe...