Search found 441 matches

by -dg
Oct 04 2018 7:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "Lingbei MM28.250 torque sensor mid drive"
Replies: 274
Views: 24613

Re: New "Lingbei MM28.250 torque sensor mid drive"

(On a side topic: the controller both powers and communicates with the torque sensor through two coils of wire: one fixed and one rotating with the pedal spindle, with only two wires from the controller to the fixed coil.. quite clever! This is needed because the torque sensor is rotating with the ...
by -dg
Sep 16 2018 12:47am
Forum: Polls & Surveys
Topic: Has interest in ebikes increased decreased or stayed the same at your location compared to 10 years ago?
Replies: 18
Views: 845

Re: Has interest in ebikes increased decreased or stayed the same at your location compared to 10 years ago?

But so far the mouth-breathers and dude brahs are disproportionately going for donut wheeled dockless scooters. That doesn't lead anywhere, unless it's the emergency room. I know you hate the scooters, and I know that you are right to do so for all the reasons. But, they are really tempting, just t...
by -dg
Sep 12 2018 8:28pm
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 116
Views: 5233

Re: List of small hatchback cars

I hated the Yaris I drove as a rental. As I remember, it did not ride well and the there was no feedback from the steering or controls so it was hard to drive smoothly. Was it the hatchback? because yes, i would agree with you, but that's a completely different car than the Yaris IA. Yes, it was th...
by -dg
Sep 11 2018 6:13am
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 116
Views: 5233

Re: List of small hatchback cars

The Fit would be my new #2 choice because the power it has.. the unfortunate thing is that it has smaller tires than the Yaris IA.. so the ride was rougher on our roads which are potholey nightmares. I hated the Yaris I drove as a rental. As I remember, it did not ride well and the there was no fee...
by -dg
Sep 11 2018 6:06am
Forum: E-Bike Technical
Topic: Rear Q100 on 130 mm dropout
Replies: 18
Views: 595

Re: Rear Q100 on 130 mm dropout

I'm looking at a similar problem, I have a really nice 1984 steel road bike that is 126mm spaced that I want to put a Q100 into. Spreading a steel frame 3mm is not a big problem but for more than that it is better to cold set the frame and then straighten the dropouts. The issue is that if you just ...
by -dg
Sep 08 2018 4:41am
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 116
Views: 5233

Re: List of small hatchback cars

I have a 2013 Honda Fit. Great little car. The interior space is very flexible. When we moved my son to college he had the whole living room piled with stuff, bike, guitar, small furniture, boxes, bags, I was sure we were going to have to rent a van, but somehow went into the Fit. However, I hardly ...
by -dg
Sep 08 2018 4:21am
Forum: Motor Technology
Topic: S12S vs S09 controller for a 20" folding e-bike
Replies: 5
Views: 313

Re: S12S vs S09 controller for a 20" folding e-bike

I have some doubts about what controller would be better for a q128c motor. I'm heasitating between two models: 1. S09: https://m.es.aliexpress.com/item/32806406829.html 2. S12S: https://bmsbattery.com/ebike-kit/552-s12s-500w-torque-simulation-sine-wave-controller-ebike-kit.html I think the S12S wi...
by -dg
Aug 30 2018 12:58am
Forum: E-Vehicles General Discussion
Topic: How much did you save driving your electric car last year?
Replies: 29
Views: 1471

Re: How much did you save driving your electric car last year?

Well, I did it. I bought a Samsung Tab A 10.1 inch Tablet at Costco for $179 ($90 off) and downloaded Canion (an app for the Mitsubishi i-miev) and synced up to the car. It gave me the pack voltage and temperature, etc. but I haven't tried driving around with it yet. All in good time. :mrgreen: It ...
by -dg
Aug 19 2018 1:55am
Forum: E-Bike Non-hub Motor Drives
Topic: New "Lingbei MM28.250 torque sensor mid drive"
Replies: 274
Views: 24613

Re: New "Lingbei MM28.250 torque sensor mid drive"

Lets take a look at the TSDZ2 torque sensor below. it seems to look alot more like the MM28 sensor, and is mounted in practically the same location... Well, sure, if by "look alot more like" you mean "a small circuit board with electronic thingys on it" and if by "mounted in practically the same lo...
by -dg
Aug 16 2018 4:02am
Forum: E-Bike Non-hub Motor Drives
Topic: New "Lingbei MM28.250 torque sensor mid drive"
Replies: 274
Views: 24613

Re: New "Lingbei MM28.250 torque sensor mid drive"

TSDZ2 original firmware as also our OpenSource firmware, they both drive the motor coils with pure sinewave / SVM Space Vector Modulation. I bet Lingbei does the same. Hmm, I don't see why they would need to, STM32 at 48Mhz is probably fast enough to do real FOC. Someone should look inside and coun...
by -dg
Aug 16 2018 12:55am
Forum: E-Vehicles General Discussion
Topic: How much did you save driving your electric car last year?
Replies: 29
Views: 1471

Re: How much did you save driving your electric car last year?

That's a good point. The CA might not be built for that kind of voltage. Plus, I don't know if I'd want to work around that kind of live voltage. Another alternative is to see if you can read the CAN bus and find the data you want there. Since that is a fairly rare car it may be hard to find the in...
by -dg
Aug 14 2018 8:16pm
Forum: E-Vehicles General Discussion
Topic: How much did you save driving your electric car last year?
Replies: 29
Views: 1471

Re: How much did you save driving your electric car last year?

5.1 mile per Kw is really good for a car with a 0.326 coefficient of drag. Just for comparison the older Leafs are 0.28 but my i-miev is 0.35 which is terrible. It's shaped like a tiny minivan but still has the same drag as some SUVs and trucks. :shock: Since i-mievs don't come with any real way to...
by -dg
Aug 13 2018 4:19am
Forum: E-Scooter and Motorcycle General Discussion
Topic: thinking about buying a scooter need advice
Replies: 5
Views: 455

Re: thinking about buying a scooter need advice

I'd avoid that particular scooter for a number of reasons: - Lead acid batteries are poor performers for this application - Lead acid batteries are very heavy, three of them will be 20 lbs or more just for the battery, the whole scooter is probably 50 lbs. - The bulky batteries under the foot deck r...
by -dg
Aug 13 2018 3:17am
Forum: E-Vehicles General Discussion
Topic: How much did you save driving your electric car last year?
Replies: 29
Views: 1471

Re: How much did you save driving your electric car last year?

4.7 is very good, I think the Leaf is a bit larger, and the hills and freeways here drive it lower. I do better on surface streets, but 4.1 is overall. On the freeway when the traffic gets thick and speeds go down the efficiency goes up. :) I agree freeways are range killers. But, if you limit your...
by -dg
Aug 11 2018 12:43am
Forum: Motor Technology
Topic: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor
Replies: 1972
Views: 75922

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

casainho wrote:
Aug 10 2018 10:43pm
That ihx is an hex file, I think. Try to rename to hex...
The ihx file is an "intel hex file" and is a standard format and name for embedded toolchains. See: https://en.wikipedia.org/wiki/Intel_HEX
by -dg
Aug 10 2018 7:46pm
Forum: E-Bike General Discussion
Topic: Who here has/uses a Spoke Tension Meter?
Replies: 12
Views: 577

Re: Who here has/uses a Spoke Tension Meter?

Wheel building is a very satisfying job when it goes well. Oh yes. I just finished a wheel a couple days ago and when I spin it in the stand the dial indicator needle just sits there dead except for a little blip at the rim joint. I'm so pleased with this that I haven't taken the wheel out of the s...
by -dg
Aug 10 2018 7:38pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 3442
Views: 169532

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

I've experimented a little with using the EEPROM for parameter storage instead of defining them in the config.h https://github.com/stancecoke/BMSBattery_S_controllers_firmware/tree/EEPROM_experimenting As an example the speed limit is read from the EEPROM address (offset) 1 in this fork. This gives...
by -dg
Aug 09 2018 8:07pm
Forum: E-Bike General Discussion
Topic: Who here has/uses a Spoke Tension Meter?
Replies: 12
Views: 577

Re: Who here has/uses a Spoke Tension Meter?

I have the Park TM-1. It works well, but the Xtools actually looks nicer. The main problem I have with the Park is that it needs a fair amount of exposed spoke. I can just barely get it to work building a small geared hub motor into a 20" wheel. A smaller wheel or a larger motor would not leave enou...
by -dg
Aug 06 2018 9:07am
Forum: E-Bike Technical
Topic: Xaomi controller circuit
Replies: 19
Views: 596

Re: Xaomi controller circuit

As a personal challenge more than nessesity I want to try creating an arduino software to communicate with this controller. I have a friend who owns a working complete scooter. I can connect to intercept data signal. What device could forum members recomend to record serial data stream. Sounds like...
by -dg
Aug 06 2018 8:54am
Forum: E-Bike General Discussion
Topic: What causes a rim to crack or split on a rear hub motor?
Replies: 30
Views: 925

Re: What causes a rim to crack or split on a rear hub motor?

As far as keeping a true rim goes, I've been lucky. As long as it's a rim that comes already attached to the hub motor and all, I don't encounter any issues. At least none that are obvious. It's only when I try to add a rim myself that I run into problems. Though, I haven't done it enough ... Keep ...
by -dg
Aug 05 2018 7:18pm
Forum: E-Vehicles General Discussion
Topic: How much did you save driving your electric car last year?
Replies: 29
Views: 1471

Re: How much did you save driving your electric car last year?

Alan B wrote:
Aug 05 2018 5:28pm
2013 Leaf 4.1 miles/kwh; $0.12753 per kwh; maintenance 0; $0.0311 per mile aggregate
Spark EV is rated at 4.4 miles/kwh, but we usually do better except on cold days. This summer we have been averaging 4.7 miles/kwh.
by -dg
Aug 05 2018 5:20am
Forum: E-Vehicles General Discussion
Topic: How much did you save driving your electric car last year?
Replies: 29
Views: 1471

Re: How much did you save driving your electric car last year?

Was the Honda Fit owned outright or were you still making payments? Did you sell the Honda Fit, trade it in on the Spark or what? Do you own the Spark outright, or are you making payments? Are registration and vehicle license taxes different for the two cars? New cars tend to pay a higher license t...
by -dg
Aug 05 2018 4:07am
Forum: E-Bike General Discussion
Topic: What causes a rim to crack or split on a rear hub motor?
Replies: 30
Views: 925

Re: What causes a rim to crack or split on a rear hub motor?

Until that day you don't need rim breaks, you will also need to become more expert at wheel truing and brake and brake cable adjustment. It will take something like 30 - 60 minutes per week to keep them in shape. Why do you say this? A properly built wheel that is not damaged should only need minor...
by -dg
Aug 04 2018 8:08am
Forum: E-Bike General Discussion
Topic: What causes a rim to crack or split on a rear hub motor?
Replies: 30
Views: 925

Re: What causes a rim to crack or split on a rear hub motor?

I try to use front and back evenly but since having to replace my headset bearings twice in the space of a few months last year, I now squeeze the back first and the front second. ... We're having a brutal rain season here in Perth Western Australia and I've noticed that every time it rains, my bra...
by -dg
Aug 04 2018 8:00am
Forum: E-Bike General Discussion
Topic: What causes a rim to crack or split on a rear hub motor?
Replies: 30
Views: 925

Re: What causes a rim to crack or split on a rear hub motor?

Another alternative to a disc brake is a drum brake. Sturmey Archer make them. They handle wet conditions well. But, your wear experience is really unusual, I don't know if it is local conditions or weather or something you are doing, but normally rims should last years. I just retired a set of whee...