Search found 87 matches

by KD5ZXG
Aug 13 2018 4:02pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6637
Views: 672866

Re: New "TSDZ2 Torque Sensor Central Motor"

I dunno. Around 3:30 redshirt trike blows past like he's standing still.
Firmware may not be cheating hard enough. More cheat, more win...
by KD5ZXG
Aug 13 2018 9:16am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6637
Views: 672866

Re: New "TSDZ2 Torque Sensor Central Motor"

You seem to object to an unrelated cadence runaway mode. Should be no cadence assist unless spokes are already moving, and live cadence sensed from pedals. I'm not saying anyone pays attention to spokes, maybe they should. None of these checks rule-out torque based assistance from a dead stop. Weigh...
by KD5ZXG
Aug 13 2018 8:46am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6637
Views: 672866

Re: New "TSDZ2 Torque Sensor Central Motor"

Why does zero only measure on powerup? Could we re-interpret zero torque as the most recent low, associated with no cadence, and that wasn't a momentary glitch? I agree that torque assist should be available from dead stop. I'm not sure how much battery current you want to put through one wind while...
by KD5ZXG
Aug 13 2018 8:23am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6637
Views: 672866

Re: New "TSDZ2 Torque Sensor Central Motor"

I can confirm that KD5ZXG appears to be correct that the value in 4002 is hex. I have several low watt motors that came from the factory with 0D in the data slot at 4002. Definitely hex, so these motors had a value of 13 decimal. I am not sure how those values translate into amps. Perhaps 0.4 batte...
by KD5ZXG
Aug 11 2018 12:31pm
Forum: E-Bike Non-hub Motor Drives
Topic: Annoy bike friction kit: any one tested?
Replies: 8
Views: 1371

Re: Annoy bike friction kit: any one tested?

Must be annoyed with some serious friction.
Shipping: $959.34 to United States via DHL
Or EMS for a mere $1,458.81

Shenzhen China Post does not appear to be an option.
Last time I used, the donkey cart got eaten by a Grue.
by KD5ZXG
Aug 10 2018 4:00pm
Forum: Battery Technology
Topic: DIY battery pack question.
Replies: 2
Views: 442

Re: DIY battery pack question.

This might not be the best answer, but I'll give it a try. Cells are often shipped at less than full charge, and might make sense to weld them in that state, rather than full. So get a resistor and bleed them all down to 3.3V Open the circuit occasionally to measure, not just how it pulls down with ...
by KD5ZXG
Aug 10 2018 10:28am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1642
Views: 225529

Re: Thread for new battery breakthrough PR releases

Further experiment to determine suitability may follow (or not):
Not the soup, the shrink wrap! Was able to tease mine off the
box without tearing. Feels 2 layers might be better than one...
by KD5ZXG
Aug 09 2018 2:23am
Forum: E-Bike General Discussion
Topic: Can anyone recommend a good balance charger?
Replies: 10
Views: 867

Re: Can anyone recommend a good balance charger?

You can find this 13S BMS at site watermarked in the image, or slightly from less from the SuPower store on Aliexpress. Not saying this is anything special BMS, only that its a convenient picture to illustrate a point. Here you can clearly see dissipative components to balance each cell at the thres...
by KD5ZXG
Aug 08 2018 10:27am
Forum: E-Bike General Discussion
Topic: Can anyone recommend a good balance charger?
Replies: 10
Views: 867

Re: Can anyone recommend a good balance charger?

So much for my earlier BMS theory. Here's an example that seems to lack dissipative balance. Not that its a bad 48V BMS. I might even buy it. But never going to balance anything by itself. https://www.aliexpress.com/store/product/13S-48V-6P-13S-78-holes-battery-holder-nickel-BMS-6P13S-6-13-holder-ni...
by KD5ZXG
Aug 08 2018 1:27am
Forum: E-Bike General Discussion
Topic: Can anyone recommend a good balance charger?
Replies: 10
Views: 867

Re: Can anyone recommend a good balance charger?

BMS can be found on aliexpress for little as $14. Leaning toward ANN power, as they supply nickle strips and everything else for DIY, they might have the right sort of junk to upgrade your pack. But beware that each cell's shunt can only bypass very little current, and the BMS will almost certainly ...
by KD5ZXG
Aug 06 2018 2:41am
Forum: E-Bike General Discussion
Topic: Monarch Fork Fail.
Replies: 22
Views: 3017

Re: Monarch Fork Fail.

I just hit a curb at full speed, not intentionally. Was listening for front fender mounts to rattle, not paying attention the concrete in front of me. Oddly enough, I didn't go ass over teakettle??? Didn't break any spokes, checking all over for damage, just wasn't any. Fork seems to have saved my b...
by KD5ZXG
Aug 06 2018 1:06am
Forum: E-Bike General Discussion
Topic: Stretch cruiser Rat Rod Build. What Motor best for single speed?
Replies: 15
Views: 866

Re: Stretch cruiser Rat Rod Build. What Motor best for single speed?

For what it's worth, hub motor plus rear pannier battery makes the thing look like a real bike. My plan was to sheet-in the tank area. Mount a pair of ANN 36V bottles to either side, with headlamps covering the forward facing bottom ends and connectors. Way my knees bend, should easily clear the ro...
by KD5ZXG
Aug 06 2018 12:33am
Forum: E-Bike General Discussion
Topic: Stretch cruiser Rat Rod Build. What Motor best for single speed?
Replies: 15
Views: 866

Re: Stretch cruiser Rat Rod Build. What Motor best for single speed?

Oh, you may want to choose a motor that conforms to the proposed new NJ regulations - https://legiscan.com/NJ/text/A1810/2018 . With so many bills with the same wording being approved in the assembly and senate , it looks like the political climate in Trenton is favorable . Torque sensing with no t...
by KD5ZXG
Aug 05 2018 10:24pm
Forum: E-Bike General Discussion
Topic: Stretch cruiser Rat Rod Build. What Motor best for single speed?
Replies: 15
Views: 866

Re: Stretch cruiser Rat Rod Build. What Motor best for single speed?

I wanted to try the S/A 5speed drum brake in place of my coaster, also a front drum to match my fork, but bought from the wrong shop and got screwed around for two months before having to admit the money was lost and i had been ripped off. Now shopping around for reliable seller to buy the same part...
by KD5ZXG
Aug 05 2018 9:57pm
Forum: E-Bike General Discussion
Topic: 16T Mac motor splayed fork dropouts - what next?
Replies: 9
Views: 719

Re: 16T Mac motor splayed fork dropouts - what next?

Invest in a stronger fork still sounds cheaper than other things you said.
by KD5ZXG
Aug 03 2018 10:48pm
Forum: Motor Technology
Topic: Minimising rotor losses
Replies: 94
Views: 7517

Re: Minimising rotor losses

One way to eliminate eddy losses in the rotor is to run a constant flux through the rotor in one constant direction. Then, only a solid chunk of iron without laminations or permanent magnets is required. And no cogging when idle. Its called a reluctance motor. Some Dyson vacuum recently had a solid ...
by KD5ZXG
Aug 01 2018 1:37am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6637
Views: 672866

Re: New "TSDZ2 Torque Sensor Central Motor"

And here OpenSource firmware for STM8 read DS18B20: https://github.com/eddyem/STM8_samples/blob/master/1-wire/onewire.c STM8 chip also offers free internal temperature sensor, already in the same enclosure as the motor. Not saying as accurate or fast as direct contact... https://www.st.com/content/...
by KD5ZXG
Jul 31 2018 10:54am
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 203397

Re: Upload Your Circuit Schematics & Requests Here...

I tried using a rolling ball tilt switch on another project and it failed due to too much current on the contacts. Only a few mA was enough to trash it, so for sure you need a transistor to boost it. They might not work well on a bike that's going over bumpy ground. The ones I've seen for brake lig...
by KD5ZXG
Jul 28 2018 4:16am
Forum: E-Bike General Discussion
Topic: Monarch Fork Fail.
Replies: 22
Views: 3017

Re: Monarch Fork Fail.

I can say now, Homely Despot galvanized sealing washers are a complete fail for this app. Under no stress, they may look the Belleville shape. But this cheap metal smashes flat too easily, leaving only rubber to do any springwork. A few cones even folded through the hole and popped out the other sid...
by KD5ZXG
Jul 27 2018 6:29pm
Forum: E-Bike General Discussion
Topic: Monarch Fork Fail.
Replies: 22
Views: 3017

Re: Monarch Fork Fail.

Just received my Sunlite Deluxe Double Springer. Paid about $125 on Amazon. Took about 3 days. So anyways, its HEAVY. And comes with no crown race. It does have the land for one... Race of my old Electra fork too hard stuck to get off in usable shape. Hopefully I picked the right size PVC pipe to sl...
by KD5ZXG
Jul 27 2018 3:00am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6637
Views: 672866

Re: New "TSDZ2 Torque Sensor Central Motor"

0x82h = 0.4V*((8*16)+2) = 52V Tried setting your median a little higher +1.2V, 0x85h maybe?? No sense trying much higher than 58.8V, which would be 0x93h. Your original number 0x77h probably equated to only 47.6V. I dunno what those mean in terms of real high and low cutoff. Especially since a separ...
by KD5ZXG
Jul 25 2018 11:44pm
Forum: E-Bike Non-hub Motor Drives
Topic: Improving original firmware - TongSheng TSDZ2 mid drive motor
Replies: 124
Views: 12270

Re: Improving original firmware - TongSheng TSDZ2 mid drive motor

Sadly, despite amazing xray photography of oddly shaped vacuum tubes that were possible with the old machine, this one hates anything that doesn't lay flat like a board. Propped it up with foam level as I could in limited time. The operator most familiar with it had no interested in tweaking for a b...
by KD5ZXG
Jul 25 2018 2:27am
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 203397

Re: Upload Your Circuit Schematics & Requests Here...

Nothing requiring a schematic. Just picked up a wireless turn signal and disappointed to discover the brake button cycles through four patterns instead of ON/OFF. Actually I was expecting a decelerometer... Well, this looks fixable on the cheap. I'm looking at a ball tilt switch, and maybe some scho...
by KD5ZXG
Jul 25 2018 2:12am
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 7570

Re: Panosonic 25ah Prismatic cells for sale $22

So, how many would I need to buy from you to get them in an original frame? I'm not even sure how many different sized frames you might have collected. I'm on the north side of Dallas. How best might they get here from Houston without the delivery man setting himself on fire? Even Greyhound won't sh...
by KD5ZXG
Jul 21 2018 12:44am
Forum: E-Bike Non-hub Motor Drives
Topic: Improving original firmware - TongSheng TSDZ2 mid drive motor
Replies: 124
Views: 12270

Re: Improving original firmware - TongSheng TSDZ2 mid drive motor

Nevermind till Monday I guess. I was working late in my own lab when those guys shut the machine down and went home for the weekend. Usually that department stays busy till 2AM. But being Friday, seems they bailed at a more sensible hour... Uncertain of all proper steps to safely turn it back on (wa...