Search found 90 matches

by ossivirt
Oct 09 2020 6:49am
Forum: Items for Sale - New
Topic: Mobipus Controller Official
Replies: 70
Views: 11583

Re: Mobipus Controller Official

Does anyone have a pre-charger he could recommend me for the 72600? I don't want the big bang when connecting my 20s 600A battery to the mobipus. Don't want to destroy it without riding it beforehand :D Resistor with right value and size must be most common setup since I have not seen many ready ma...
by ossivirt
Oct 02 2020 7:06am
Forum: Items for Sale - New
Topic: Mobipus Controller Official
Replies: 70
Views: 11583

Re: Mobipus Controller Official

Anyone else having experience with troubleshooting installation of the Mobipus Software? http://52.25.253.50/forums/viewtopic.php?f=7&t=104620&sid=5990ede7415f58fdfa22adbe4b11229a Weird problem: I've got the software for my Mobipus 72600 from https://ballaratebikes.com/pages/downloads but when I tr...
by ossivirt
Sep 19 2020 2:35pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5428

Re: ”The barge” efoil build

larsb wrote:
Sep 19 2020 2:31pm
I’ve got a drysuit so my season is eternal :wink:
Its all good and fun untill lake freezes over :lol:
by ossivirt
Sep 19 2020 2:06pm
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 386
Views: 64978

Re: Spot Welding Copper Strips to 18650 Battery Cells

I have not tried thicker than 0.2mm copper so 2mm must be totaly different beast to weld. Maybe if electrodes are placed on opposite sides (one against 2mm copper and another 0.15mm nickel side) it would be easier or even possible to weld :roll:.
by ossivirt
Sep 06 2020 2:49am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1194
Views: 173085

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

Also if you have more batteries you should try to ad one more paralel so weld current goes up to 1500-1800A and that gives you shorter pulse times what means in copper welding that more energy goes to weld and less for heating the copper around the weld. I bet you can turn down joule setting with m...
by ossivirt
Sep 04 2020 7:57am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1194
Views: 173085

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

0.1mm copper 0.2mm nickel 90 joules 1150-1200 amps Looks a little hot, but during tests, this is where Good adhesion is. https://drive.google.com/file/d/1-K7nLbpHJJgJjSZHHYbwyDEvOcehPNMV/view?usp=drivesdk 90 joules sound like a lot to me. I think I used 50-60 just for 0.1mm copper. It is not very s...
by ossivirt
Aug 25 2020 4:10pm
Forum: Items for Sale - New
Topic: Mobipus Controller Official
Replies: 70
Views: 11583

Re: Mobipus Controller Official

Does anyone know by the way how to connect the hall sensors? The Mobipus has Hall B, G Y on its datasheet, meanwhile my me1304 Motor has "sin", "cos" and "shield". How do I connect them now? Hard to say for sure. I would put blue to blue and green to green so that leaves yellow to white. Test it wi...
by ossivirt
Aug 17 2020 3:33am
Forum: Items for Sale - New
Topic: Mobipus Controller Official
Replies: 70
Views: 11583

Re: Mobipus Controller Official

A couple of questions, if anyone knows. I get an occasional "Motor Coil Fault Type B" error with shutdown, what should I look for? Also, it appears that there is a firmware update available for the controller itself, is that advisable? I'd hate to turn the controller which is mostly working ok into...
by ossivirt
Aug 12 2020 1:53am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 152
Views: 21037

Re: KTM 200 exc goes electric

I have similar looking ant bms that just one time when I installed my battery back after some tire work gave the discharge mosfet abnormality error. I pulled one leg up from every mosfet and found the shorted one. Really strange way to go imo since it didn't faill under any load.. Anyway since I did...
by ossivirt
Aug 12 2020 1:32am
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 386
Views: 64978

Re: Spot Welding Copper Strips to 18650 Battery Cells

Kweld is probably best at that price point but 0.3mm copper could be too thick for it. Depends really how thick the nickel plating is on that strip. If you buy kweld for that job you want to go for dual lipos that will give close to 2000A weld current and thicker leads on electrodes to have any chan...
by ossivirt
Aug 03 2020 7:11am
Forum: Items for Sale - New
Topic: Mobipus Controller Official
Replies: 70
Views: 11583

Re: Mobipus Controller Official

Connector name: "16 Pin FW-C-16M-B FW-C-16F-B " on google or on alibaba "hall sensor connector white 16 pin" Took me an hour of research. Show some love pls. thx Cheers Thats a lot of pins for just hall sensors.. Controller has 26 pin d-sub connector for all low power connections. Atleast my 72200 ...
by ossivirt
Aug 01 2020 1:41pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5428

Re: ”The barge” efoil build

Improving the heat management of the controller: mounting a 400g alu block with heat paste between the two. Simple, crude but effective for a while :D 27DDDC34-DD3C-4ACB-889D-C1E9926A684D.jpeg That reminds me of a guy from other forum that mounted about same sized block of copper to his cpu and was...
by ossivirt
Jul 17 2020 3:50pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 152
Views: 21037

Re: KTM 200 exc goes electric

j bjork wrote:
Jul 17 2020 3:33pm
180 holes later:

I hope I didn't overdo it :shock:
It is pretty light anyway, under 1kg on the scale..
Lets hope it survives. That looks like radialy laced rim and we all know cross laced is stronger but I have no idea what will happen next :lol:
by ossivirt
Jul 02 2020 1:53pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1194
Views: 173085

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: 84
Views: 3058

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: 84
Views: 3058

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: 1194
Views: 173085

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: 3184

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: 3184

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: 3184

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: 152
Views: 21037

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: 1194
Views: 173085

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: 128
Views: 20030

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: 1194
Views: 173085

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: 290
Views: 48421

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...