Search found 186 matches

by tomtom50
Jan 20 2019 5:10pm
Forum: Motor Technology
Topic: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor
Replies: 3765
Views: 176720

v0.17 Issues on new installation

I successfully loaded v0.17 beta 4 following the github instructions and jbalat's video. Thanks to all, especially casainho, jbalat, and everyone who contributes to the github instructions. I have worked out a nice connectorized solution that connects throttle and brakes with waterproof connectors h...
by tomtom50
Jan 19 2019 8:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Open Source Upgrade with Waterproof Connectors

Here is how to wire an Open Source system with Only one splice Brakes and throttle Waterproof Connectors Connectorized KT-LCD3 display for easy firmware flashing Here all unplugged DSC00378 annotated.jpg All buttoned up DSC00380.jpg The one splice cable info is at https://endless-sphere.com/forums/v...
by tomtom50
Jan 06 2019 3:03am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Re: New "TSDZ2 Torque Sensor Central Motor"

I set up a 52v 750w tonsheng today with a 52v 13ah u.p.p. battery.. only turns on for a split second then turns off. What could I be doing wrong?? I had the same problem. 52V battery and 52V tsdz2. It turned out that even though the motor was marked 52V it had 48V firmware installed. Apparently a b...
by tomtom50
Jan 01 2019 5:37pm
Forum: Motor Technology
Topic: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor
Replies: 3765
Views: 176720

Options for higher cadence

TSDZ2 too little assist if you have a high cadence There is no easy way to up the cadence I'm afraid with the standard motor direct from the factory, it is a pain for any body who cycles a lot and has a slightly more higher cadence than you average commuter. Do consider though to simply revise your ...
by tomtom50
Dec 29 2018 4:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Re: New "TSDZ2 Torque Sensor Central Motor"

Connectorized KT-LCD3. Flashing the KT-LCD3 requires opening the case and making connections to the J7 holes on the PCB. Various ideas are on the forum, here is another. I used a 4-pin JST-XH connector, which can be soldered directly to PCB holes and fits nicely after a clearance hole is cut in the ...
by tomtom50
Dec 29 2018 1:39pm
Forum: Motor Technology
Topic: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor
Replies: 3765
Views: 176720

Re: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor

Hi all. I just flashed KT-LCD3, next I flash the motor. Thanks jbalat & andyme for instructions and of course casainho for the development. A couple questions: 1. Before I flash the motor, where are the torque sensor calibration constants stored? In the motor or the VLCD5? How do I prevent losing co...
by tomtom50
Dec 29 2018 9:23am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Re: New "TSDZ2 Torque Sensor Central Motor"

Hi all. I just flashed KT-LCD3 on the way to trying the open source firmware. Thanks jbalat & andyme for instructions and of course casainho for all the effort. A couple questions: 1. The ST V link I have puts out 3.3V, not 5V. It seemed to work but the LCD was super dim. Is it OK to use 5V from ano...
by tomtom50
Dec 29 2018 9:01am
Forum: E-Bike General Discussion
Topic: Middrive vs. rear hub for my first e-bike
Replies: 33
Views: 2721

Re: Middrive vs. rear hub for my first e-bike

...200w is a lot of effort, you have to be pretty strong to maintain 200w for 1/2 hour Yup, but we were talking about motors. Mine could have maintained 3000 w continuous for a year and a half, since this conversation took place. :D Right. 200w is a benchmark to use in bikecalculator.com to get a f...
by tomtom50
Dec 28 2018 6:57pm
Forum: E-Bike General Discussion
Topic: Middrive vs. rear hub for my first e-bike
Replies: 33
Views: 2721

Re: Middrive vs. rear hub for my first e-bike

I think you'll be a lot happier with a mid drive like BBSHD or BBS02 than you will with a hub motor. Hub motors are easier to install, and they don't punish your bike's pedal gears. But they don't excel at a big range of loads unless you use a really powerful one, which means lots of weight and a c...
by tomtom50
Dec 28 2018 6:24pm
Forum: E-Bike General Discussion
Topic: Middrive vs. rear hub for my first e-bike
Replies: 33
Views: 2721

Re: Middrive vs. rear hub for my first e-bike

7% is climbing 7 ft on a 100 ft course. If you find it steep, you must be living on the salted flats. :wink: 7% is 4 degrees of slope. 7% is steeper than it sounds. I live in Seattle. Our hills are steep. Very few exceed 8% for more than 2 or 3 blocks. I think this is about perception. 8 foot rise ...
by tomtom50
Dec 21 2018 8:25pm
Forum: E-Bike Technical
Topic: Q100h planetary needed
Replies: 2
Views: 314

Re: Q100h planetary needed

Topbikekit.com also sells the q100h. They say they can order parts for these and other Aikema motors.

I’ve ordered stuff from topbikekit, good results. They have a lot of interesting stuff not available elsewhere, and good prices.
by tomtom50
Dec 20 2018 7:14am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 143
Views: 19847

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Anyone tested the g310 against a xiongda YTW-S (the famous 2 speed motor) ? What would you test, they are so different? The xiongda in low is low. 125rpm. Able to climb steep hills without overheating. The G310 is 300 rpm at 36v / 400rpm at 48v. Good for high speed on the flat, but not safe on a st...
by tomtom50
Dec 13 2018 6:29pm
Forum: E-Bike General Discussion
Topic: Where are the hq geared hub motors?
Replies: 20
Views: 1136

Re: Where are the hq geared hub motors?

I've been rebuilding 2 MACs for my AWD Fatty . Standard Stator and runner, standard gears (but greased with Aeroshell), and with a beefy clutch (up to 170Nm). It has a side entry motor cable and internal gear & temp sensor. Heavy duty use, so far no problem. Been tinkering with the idea of a 2-spee...
by tomtom50
Dec 13 2018 3:20pm
Forum: E-Bike General Discussion
Topic: Where are the hq geared hub motors?
Replies: 20
Views: 1136

Re: Where are the hq geared hub motors?

Because hub motors in general suck due to adding mass in the worst possible place and it's not worth making expensive high end geared hubs. It would be too much of a niche product and by the time you get around making everything decent quality and in low volume it will cost over twice as much. Basi...
by tomtom50
Dec 13 2018 9:32am
Forum: E-Bike General Discussion
Topic: Lightest motor for hill climbing and 135mm dropout with disk brake?
Replies: 19
Views: 1436

Re: Lightest motor for hill climbing and 135mm dropout with disk brake?

I'm not familiar with measurements from geared hub motors, but I'm familiar with the range of gearhub efficiencies ranging from low 90% range (Sturmey Archer 3sp and comparable) to below 80% (NuVinci). I assume these efficiencies include chain losses, so it's not all gear losses. At the same time, ...
by tomtom50
Dec 12 2018 9:28pm
Forum: E-Bike General Discussion
Topic: Lightest motor for hill climbing and 135mm dropout with disk brake?
Replies: 19
Views: 1436

Re: Lightest motor for hill climbing and 135mm dropout with disk brake?

Remember when you're doing your thermal limit estimates that the reduction gearing also suffers some power loss and heat accumulation. I'm guessing on the order of 10%. I got off track on plastic vs metal (confused with another thread). You are totally right gear loss needs to be added to motor eff...
by tomtom50
Dec 12 2018 9:21pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Re: New "TSDZ2 Torque Sensor Central Motor"

Ron Paul's Blimp wrote:
Dec 12 2018 1:44am
tomtom50 wrote:
Dec 11 2018 11:29pm
Yeah, I bought one and didn't use it. The machining was defective, the offset was less than claimed, really no better than the stock dished 42T spaced back with 1mm washers.
Ugh that sucks. Thanks for the warning.
Yeah. I was too lazy to return it.
by tomtom50
Dec 12 2018 9:18pm
Forum: E-Bike General Discussion
Topic: Lightest motor for hill climbing and 135mm dropout with disk brake?
Replies: 19
Views: 1436

Re: Lightest motor for hill climbing and 135mm dropout with disk brake?

Remember when you're doing your thermal limit estimates that the reduction gearing also suffers some power loss and heat accumulation. I'm guessing on the order of 10%. A common number for a planetary stage is 3%. That doesn't increase for double reductions that are achieved using planet gears that...
by tomtom50
Dec 12 2018 12:32am
Forum: E-Bike General Discussion
Topic: Lightest motor for hill climbing and 135mm dropout with disk brake?
Replies: 19
Views: 1436

Re: Lightest motor for hill climbing and 135mm dropout with disk brake?

I went to bikecalculator.com. 300 lb up a steep (10%) grade at 5mphis 330W. Very doable, if you are at an efficient hub rpm you will draw 415W, 85W will go to heat in the hub, and a hub can shed 85W. 5mph on a 20 inch wheel is 84rpm, that is where it gets hard. To still be in an efficient motor rang...
by tomtom50
Dec 11 2018 11:48pm
Forum: E-Bike General Discussion
Topic: Where are the hq geared hub motors?
Replies: 20
Views: 1136

Re: Where are the hq geared hub motors?

Are the gears a problem? I've seen photos where they failed in over-heated hubs, but how important is it to make gears that are fine but the magnets are ruined? Metal gears could handle more torque, but more torque means more heat, and the heat path in geared hubs is worse than DD hubs. The Aikema Q...
by tomtom50
Dec 11 2018 11:29pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Re: New "TSDZ2 Torque Sensor Central Motor"

Has anyone used https://www.electrifybike.com/store/p65/42_Tooth_Narrow%2FWide_CNC_7075_T6_Chainring_%2810mm_offset%29_for_TSDZ2.html ? Looking at my motor and the pictures I wonder if it'd interfere where the cables come out of the controller. Yeah, I bought one and didn't use it. The machining wa...
by tomtom50
Dec 09 2018 9:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

How to make Waterproof Open Source Firmware Cable

Here is a cable that: Plugs into a standard TSDZ2 motor Doesn't modify the stock setup, so the upgrade can be undone Uses waterproof connectors Plugs directly to the green 5-pin KT-LCD3 cable Works with 8-wire (throttle) TSDZ2 You need two cables: Higo B8 This plugs into the TSDZ2 I bought from http...
by tomtom50
Dec 09 2018 4:36pm
Forum: E-Bike General Discussion
Topic: Best Sub 4KG hub motor ?
Replies: 29
Views: 1900

Re: Best Sub 4KG hub motor ?

Title sums it up: what's the most powerfull hub motor under 4KG currently available - APART FROM THE XIONGDA 2 SPEED ? That one does not fit into my aluminium (disc only) frame. I'm surprised no one mentioned the Aikema 128 in this thread. 2.8kg Two basic versions, 500W and 800W "H" Sold by BMS bat...
by tomtom50
Dec 09 2018 2:33pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Re: New "TSDZ2 Torque Sensor Central Motor"

[quote=tomtom50 post_id=1430428 time=1544321617 Are you guys building your own packs? GA cell 13S2P is hard to find. I almost had one custom built, but I already have a (heavy) 14S3P pack I can use on both bikes so it was hard to justify. I do..I love the flexibility and you can save alot of money....
by tomtom50
Dec 08 2018 9:13pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5781
Views: 475212

Re: New "TSDZ2 Torque Sensor Central Motor"

Exactly Andy.. I like 14s but 14s2p is not enough and 14s3p would be way too heavy unless there are some better cells out there than the GA's ? 15s2p is tempting but will it blow the display ? And can you get a 15s bms to suit ? It really depends if you want a heavy commuter or playful jump bike.. ...