Search found 29 matches

by that1guy
Aug 23 2019 1:01am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4397
Views: 414990

Re: Sur-Ron - New Mid drive Bike

spray some water on it and then pull away hard .... see if the buzzing noise stays away. if so then you can provide the edges of the belt (not the tread / teeth themselves) with a thin layer of bee wax or other natural fat without plasticizers that can damage the rubber of the belt. I tried basical...
by that1guy
Jun 03 2019 12:27am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4397
Views: 414990

Re: Sur-Ron - New Mid drive Bike

I did an experiment to find maximum charging current that the surron BMS will allow:
20A is ok, but it will shut off at 25A. Thought this would be useful for those experimenting with a non-surron chargers.
by that1guy
Jun 02 2019 10:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4397
Views: 414990

Re: Sur-Ron - New Mid drive Bike

I've been using my own power supply to charge the surron at work for the past week - it's been working fine. But today I arrived with 14% charge and my power supply won't charge the surron battery. I measured 53V on the surron charge connector and main terminals. Anybody else experience this? I wond...
by that1guy
May 26 2019 4:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4397
Views: 414990

Re: Sur-Ron - New Mid drive Bike

@Joachim, @captain387 - thanks for links, quite helpful. :) Why do they list tires as "Front". Something to do with load rating perhaps? Maybe this applies to more powerful motorcycles where the rear tire would see more sheering force. You guys are using these in both rear and front I presume. Do yo...
by that1guy
May 25 2019 8:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4397
Views: 414990

Re: Sur-Ron - New Mid drive Bike

Looks like there are no practical options for 19 inch (rim size) street tires. Only thing I can find is the Avon AM6 Speedmaster Motorcycle Tire, 27-19 for $167 at bikebandit.com https://www.bikebandit.com/tires-tubes/motorcycle-tires/avon-am6-speedmaster-motorcycle-tire/p/3324?b=44372&CRTP=psc :con...
by that1guy
May 25 2019 8:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4397
Views: 414990

Re: Sur-Ron - New Mid drive Bike

Maybe someone can help me out also, I'm almost done with my 2nd Sur-Ron charger. I am wondering why the Sur-Ron uses a 3 prong connector for the charger. I can't think of any reason why they would use a 3 prong connector because unless its 4 prong to help split the current, there is no benefit. Is ...
by that1guy
Apr 28 2019 9:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: SURRON LB: RESEARCH & DEVELOPEMENT
Replies: 206
Views: 23592

Re: SURRON LB: RESEARCH & DEVELOPEMENT

Anybody have pictures of the battery internals? Also looking for battery case dimensions. I am considering building a custom pack with 2170s.
by that1guy
Jul 10 2018 3:06am
Forum: Battery Technology
Topic: ULtra Compact 1800W charger + Eltek programming
Replies: 288
Views: 49938

Re: ULtra Compact 1800W charger + Eltek programming

Another alternate way to control the eltek:
Use raspberry pi + python + cheap CAN-USB dongle
https://github.com/jutshanahan/eltek-control
http://canable.io/
by that1guy
Dec 20 2016 3:17pm
Forum: Battery Technology
Topic: ULtra Compact 1800W charger + Eltek programming
Replies: 288
Views: 49938

Re: ULtra Compact 1800W charger

Merlin wrote: i got also the bad news from eltek about the price BUT if i take enough(50!!!) i could sell them for 275€ each.
still not that cheap. but theres no other PSU out there to beat that power/size.
how many guys are interessted if i can get that price?
+1 for a 1.8kW
by that1guy
Sep 30 2016 3:27pm
Forum: Battery Technology
Topic: ULtra Compact 1800W charger + Eltek programming
Replies: 288
Views: 49938

Re: ULtra Compact 1800W charger

Dawn, is CAN termination required?
by that1guy
Aug 04 2016 12:25am
Forum: Battery Technology
Topic: About to order from NKON.nl - What to expect?
Replies: 41
Views: 6505

Re: About to order from NKON.nl - What to expect?

Neo, thanks for feedback. I'm in the US too. Looks like shipping is ~50USD. How long did it take on average?

You have any means of verifying the cells are legit?
by that1guy
Aug 02 2016 12:33am
Forum: Battery Technology
Topic: About to order from NKON.nl - What to expect?
Replies: 41
Views: 6505

Re: About to order from NKON.nl - What to expect?

Neo2172, did you get charge import fees (aka duties)?
by that1guy
Jul 03 2016 1:28am
Forum: E-Bike General Discussion
Topic: Battery Build - Qulbix Q76R and Raptor 140 Battery
Replies: 5
Views: 1244

Re: Battery Build - Qulbix Q76R and Raptor 140 Battery

Here's a dxf of the Q76R battery window.
by that1guy
May 20 2016 1:51am
Forum: Items for Sale - New
Topic: MXUS 3K Turbo (V3) 45mm Direct Drive Hub Motor
Replies: 179
Views: 51260

Re: MXUS 3K Turbo (V3) 45mm Direct Drive Hub Motor

I don't understand what's meant by "twisted" hall sensors? You mean they're place in the wrong order? As in the hall phase does not match the motor phase? when i was saying twisted, i meant that the Hall wasn't mounted properly. the surface with the magnet sensitive part should face the magnets. th...
by that1guy
May 20 2016 1:49am
Forum: Items for Sale - New
Topic: MXUS 3K Turbo (V3) 45mm Direct Drive Hub Motor
Replies: 179
Views: 51260

Re: MXUS 3K Turbo (V3) 45mm Direct Drive Hub Motor

I don't understand what's meant by "twisted" hall sensors? You mean they're place in the wrong order? As in the hall phase does not match the motor phase? when i was saying twisted, i meant that the Hall wasn't mounted properly. the surface with the magnet sensitive part should face the magnets. th...
by that1guy
May 17 2016 1:44am
Forum: Items for Sale - New
Topic: MXUS 3K Turbo (V3) 45mm Direct Drive Hub Motor
Replies: 179
Views: 51260

Re: MXUS 3K Turbo (V3) 45mm Direct Drive Hub Motor

further it looks like mxus still don't get it how the middle hall sensor needs to be installed (one is twisted). a hall that is not installed correct will worsen eff and performance and it makes it impossible to fine-tune a modern sine wave controller. i know thats mostly criticism from my side, bu...
by that1guy
May 16 2016 8:52pm
Forum: Battery Technology
Topic: JP spot-welder, FET-switched, timed adj. pulse
Replies: 612
Views: 67722

Re: JP spot welder

Decided to jump in the tab welder game. Specs: 8x 0.11F (rated), 0.15F (measured), 15V ALEL caps => 120J 6x IRFP4004 MOSFETS, 40V, 1.35mΩ 6.35mm thick Al busbars Any more pictures, this looks rad. Did you mill the traces or use a photoresist? Any plans to sell kits/opensource? Voltage or discharge ...
by that1guy
May 12 2016 3:34am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1529
Views: 205056

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

New guy here,... and I LUV my 1500w Leaf! But what would I know,.... I've never had anything else like it!!! My desire began with an old man wanting "one last motorbike". Jus never thought it'd be a battery powered bicycle!!! And that was only lightly considered AFTER I had carefully weighed the pr...
by that1guy
May 12 2016 2:43am
Forum: Battery Technology
Topic: TaK's Battery Build - 18650 w DIY CD Welder- Lessons Learned
Replies: 22
Views: 1700

Re: TaK's Battery Build - 18650 w DIY CD Welder- Lessons Lea

Tak, nice work! And thanks for the pics and explanations. With 40-50J welds, that back calculates to 30V. Prior to your post, I would've guessed 30V welds would result in blow outs. But looks like you're having good success. Check out this for calculating/guesstimating inductance of parallel wires. ...
by that1guy
May 11 2016 2:50am
Forum: Battery Technology
Topic: JP spot-welder, FET-switched, timed adj. pulse
Replies: 612
Views: 67722

Re: JP spot welder

Decided to jump in the tab welder game.

Specs:
8x 0.11F (rated), 0.15F (measured), 15V ALEL caps => 120J
6x IRFP4004 MOSFETS, 40V, 1.35mΩ
6.35mm thick Al busbars
Image
by that1guy
May 05 2016 10:55pm
Forum: Battery Technology
Topic: JP spot-welder, FET-switched, timed adj. pulse
Replies: 612
Views: 67722

Re: JP spot welder

Tom[/quote]
you are kidding right? People have been using 12v - 24v lead acid and coat hangers to spot tack weld for decades
[/quote]

Wow. Lol. Please show me an example of this. Last time i checked coat hangers are made of steel, which is 10x worse conductor compared to copper.
by that1guy
May 04 2016 5:29am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1529
Views: 205056

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

It took a bunch of nagging, but i finally got the NTC thermistor (temp sensor) spec from Leaf. Type = MF5A-4-60MM R25 = 100k B25/50 = 3950 I think some people reported their motor came with R25=10kΩ installed. But IDK if they actually measured it. Luke measured his, https://youtu.be/WZnYc654Nps?t=18...
by that1guy
Apr 28 2016 1:51am
Forum: E-Bike Technical
Topic: Adaptto Mini-E/Max-E Owner's Thread
Replies: 5128
Views: 586276

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

I have a Mini-E "4kW" controller. It only can do max 56A at 45V, so this is 2.5kW. I measured current with my own ammeter to verify adaptto was reporting correct current.

Anybody else have this problem w/their "4kW" controller. It's over promising and under-delivering.
by that1guy
Apr 15 2016 1:27pm
Forum: Items for Sale - New
Topic: CNC parts service for ES members!
Replies: 3
Views: 779

Re: CNC parts for ES members!

Location updated, thank you sir.
by that1guy
Apr 07 2016 2:03am
Forum: Items for Sale - New
Topic: CNC parts service for ES members!
Replies: 3
Views: 779

CNC parts service for ES members!

Hello, I would like to offer a cnc service for my fellow ebike enthusiasts. I have a Shopbot Desktop. It's a 3 axis mill with table size is 24 inch x 18 inch. The machine will cut aluminum ... and of course plastics.. Accuracy / repeatability is about 0.001 inch (0.025mm) Sorry but my small machine ...