Search found 2997 matches

by madin88
Feb 06 2021 11:52am
Forum: Battery Technology
Topic: Self-Discharge UPDATE On 30Q 141 Cells
Replies: 62
Views: 2088

Re: Self-Discharge UPDATE On 30Q 141 Cells

im not disputing any numbers youre putting out lets do 1 question at a time you desulfated the self discharging cell is it still losing capacity everyday? or holding steady? If those cells which have a problem with self discharge could be healed by discharging to 2.5V, they all would repair themsel...
by madin88
Feb 04 2021 8:01am
Forum: EBike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 1087
Views: 99400

Re: E-S LMX 64 Bike Owners

About belts, i ordered 3pcs polychain belts, those are strongest belts what we been using in industry. Lets see how those will last, once get them into testing. I think you wont be able to use Polychain as it has different tooth profile and if you would use it with 15T pulley it will crack in no ti...
by madin88
Feb 02 2021 11:13am
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1046

Re: Spring or air??

You can't judge what is really the best by looking at what pro riders use. They are sponsored and heavily controlled by manufacturers whose business model dictates them to show marketable and profitable wares. The bike industry is sadly a 'fashion' hardware industry as well. Better to sell limited ...
by madin88
Feb 02 2021 10:59am
Forum: Battery Technology
Topic: Speedict neptune lite
Replies: 179
Views: 19710

Re: Speedict neptune lite

you can compare with speed controller 3 phase wire's gauge#, motor 3 phase gauge#, it should use 12 AWG for 100A as well right ? if connectors is overheated and melt solder down (~130C) then the speed controller's switching MOSFETs should already been damaged, or the bad contact of connector caused...
by madin88
Feb 02 2021 7:28am
Forum: Battery Technology
Topic: Speedict neptune lite
Replies: 179
Views: 19710

Re: Speedict neptune lite

Amp ratings? Almost no info on your webpage. In the user guide it says "DISCHARGE CURRENT RANGE 0 - 59.00A" So I expect it to handle 50A. It comes with tiny 14AWG wires which are only rated to 15A. So the 15 in "NEPTUNE 15" is the Amp rating? False advertising! Don't need to wor...
by madin88
Jan 31 2021 9:07am
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1046

Re: Spring or air??

Nope. Go look at any race results and what forks are being used. Go look at any website that reviews and ranks forks. Air > coil. Show evidence to the contrary. Yes thats true but thats probably because MTB or DH have other priorities. Weight is one of the most important things with all bicylce par...
by madin88
Jan 30 2021 7:31am
Forum: Battery Technology
Topic: Self-Discharge UPDATE On 30Q 141 Cells
Replies: 62
Views: 2088

Re: Self-Discharge UPDATE On 30Q 141 Cells

i just do a 0.6amp discharge to 2.5v then charge it back to 4.2v then do the 0.6amp discharge to 2.5v and charge it back up and its done heres the link https://endless-sphere.com/forums/viewtopic.php?f=14&t=109601 Pretty interesting what you found out :thumb: If this desulfating would help to h...
by madin88
Jan 30 2021 7:03am
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1046

Re: Spring or air??

The reason air doesn't work as well in a rear shock is because the shaft has to be enlarged for air, which carries a larger sticktion penalty than a thin shaft on a coil spring shock. Sticktion reduces small bump and low (shaft) speed tracking. So air shocks just aren't as smooth as coil shocks. Ye...
by madin88
Jan 29 2021 12:41pm
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1046

Re: Spring or air??

Spring > Air. As long as weight is not an issue YES, spring will always be better (with the right spring which doesn't need preload) because it has better sensitivity at the beginning of the stroke, whereas an air system always needs to overcome the preload first before it starts moving so it canno...
by madin88
Jan 25 2021 12:16pm
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 460
Views: 45541

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

I am trying to understand the settings for PAS when using a torque sensor. My plan is to work out some basic values one can start with to get a smooth assistance (as usual ebikes feel) from 100W to something like 2000W max. As Torque sensor the Sempu 4.3 is known to work but also Erider can be used....
by madin88
Jan 25 2021 5:51am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1430
Views: 126545

Re: APL's DIY axial-flux motor

As discussed before once the two halfs are resting on the spacers no magnet axial load are taken by the bearings assuming the functionnal play is good on the axle ( some 1/10 of a mm is good enough with a 1 mm airgap) Exactly. A tiny gap between sidecovers and spacer to preload the bearing when ass...
by madin88
Jan 25 2021 5:42am
Forum: Battery Technology
Topic: Self-Discharge UPDATE On 30Q 141 Cells
Replies: 62
Views: 2088

Re: Self-Discharge UPDATE On 30Q 141 Cells

30Q selfdischarge (test from docware): https://endless-sphere.com/forums/viewtopic.php?f=14&t=103092&sid=abc8b7e2259830a0147f423c4c907f9f&start=500#p1613728 from 100% soc to 50% (3,7V) within 32h :lowbatt: :lowbatt: 40T shares the same characteristics as the 30Q and es member rg12 mentio...
by madin88
Jan 21 2021 7:46am
Forum: Battery Technology
Topic: Self-Discharge UPDATE On 30Q 141 Cells
Replies: 62
Views: 2088

Re: Self-Discharge UPDATE On 30Q 141 Cells

It's my understanding that you need to leave the charger plugged in after the green light comes on in order for the BMS to even do a half-decent job of balancing the p-group cells within 25-30mO of each other. Supposedly this should be done for 12-16 hours once a month and later every two weeks (wi...
by madin88
Jan 21 2021 7:19am
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 460
Views: 45541

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

Blacksword wrote:
Jan 19 2021 6:18pm
Bought a Nucular 12f and plan to use it with a QS205 5T shooting for 10kw, is this going to be to much for this controller?
The 12F could be a bit weak for this motor and overheat if it doesn't get enough fresh air.
Wheelsize and battery voltage also matters if you might be happy with it or not.
by madin88
Jan 21 2021 6:30am
Forum: Items for Sale - New
Topic: li-ion 18650 Adjustable size BATTERY HOLDER - Honeycomb Layout
Replies: 69
Views: 20208

Re: li-ion 18650 Adjustable size BATTERY HOLDER - Honeycomb Layout

They are not wired for Bafang. Ask me how I know... You need to change the wiring. Did you get the ecobike or rapid version? Thanks for the info. I had a similar issue with the wiring that colors are not standard. I ordered both, Thumb and Trigger trottle with the note "Rapid, KT, Bolt". ...
by madin88
Jan 19 2021 12:46pm
Forum: EBike General Discussion
Topic: I need a light enduro frame for next build....
Replies: 39
Views: 1453

Re: I need a light enduro frame for next build....

I would use Sapim Strong 13/14GA spokes with polyax brass nipples 😉
by madin88
Jan 19 2021 12:22pm
Forum: Battery Technology
Topic: How to handle series connection in a moderately large 18650 battery build?
Replies: 6
Views: 282

Re: How to handle series connection in a moderately large 18650 battery build?

Hi David, do you have a spot welder? For 200A and 36P (in your case 18p x 2) it would be be sufficient using one big nickel strip with 0.15mm and i think even the one you have would be already enough (if it is pure nickel with 0.15mm). The distance the current has to flow through those connections i...
by madin88
Jan 19 2021 6:23am
Forum: Battery Technology
Topic: Self-Discharge UPDATE On 30Q 141 Cells
Replies: 62
Views: 2088

Re: Self-Discharge UPDATE On 30Q 141 Cells

This self discharge isn't by itself in most cases isn't a reason to trash the pack...or even the cell. But does require some degree of balancing. I had to trash batteries where i used 30Q cells because of self discharge and know about others who had similar issues with that cell. One pack i was try...
by madin88
Jan 18 2021 1:41pm
Forum: EBike General Discussion
Topic: I need a light enduro frame for next build....
Replies: 39
Views: 1453

Re: I need a light enduro frame for next build....

I ordered this motor over the weekend. A positive note regarding axle is it is solid. Cables do not run through center, but instead pop out side of motor through slot in middle axle section (wider than 12mm axle) that is protected inside frame dropouts. Yes it seems they changed the axle from G060 ...
by madin88
Jan 18 2021 7:45am
Forum: EBike General Discussion
Topic: I need a light enduro frame for next build....
Replies: 39
Views: 1453

Re: I need a light enduro frame for next build....

I think it's fair to compare the geared fatbike motor to the next closest thing markz mentioned (Leaf 1500W). The fatbike motor is lighter by about five pounds. That's significant, but it comes with tradeoffs. It's less efficient, so easier to overheat, and it rejects heat a lot more slowly than th...
by madin88
Jan 13 2021 4:05am
Forum: EBike Non-hub Motor Drives
Topic: GNG / CYC X1 Pro 3000w
Replies: 707
Views: 97165

Re: GNG / CYC X1 Pro 3000w

I have just tried it without the torque sensor connected and I no longer have the running on it's own issue. Seems the torque sensor has some damage. Now the question is...can that cause the display to stop functioning correctly with the non responsive button presses and random headlight icon displ...
by madin88
Jan 13 2021 4:02am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1430
Views: 126545

Re: APL's DIY axial-flux motor

Remember, adhesive bonding is optimal for loading in shear, and sub-optimal for loading in tension or peel. So if there are any tensile or peel type loads, consider additional methods of fixing. As it looks, the two halves from the cores are held together with the countersunk screw so the glue woul...
by madin88
Jan 11 2021 7:09am
Forum: Battery Technology
Topic: Imbalance When Empty?
Replies: 14
Views: 346

Re: Imbalance When Empty?

IR, tab weld resistance/cold tab weld/hot weld, variance in thickness of tab metal, variance in solder thicknesses, wire gauge used, cells at the beginning or end of "S"eries.... .....between the cells will have a more drastic effect then it would at the left part of the charge, more char...
by madin88
Jan 09 2021 10:52am
Forum: EBike Technical
Topic: XT 90 antispark
Replies: 10
Views: 648

Re: XT 90 antispark

XT90s are made for RC model controllers which have lower voltage and way lower capacitance to precharge.

The resistor would have to be one with 50ohm or so that it doesn't blow when using it with 20s on big ebike controller.
by madin88
Jan 07 2021 5:57am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1430
Views: 126545

Re: APL's DIY axial-flux motor

I may not be able to have my cake and eat it too, so it may come down to that yet, but I'm still holding out for a motor that I can take apart and rework easily, as I have done with this one a few times already. Do you think that you can wind the coils when assembled? If so, then i can think of no ...